Pandoc User’s Guide
John MacFarlane
September 9, 2024

Contents
Synopsis1

Description

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Using pandoc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifying formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Character encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Creating a PDF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading from the Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options

General options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reader options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General writer options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options affecting specific writers . . . . . . . . . . . . . . . . . . . . . . . . . .
Citation rendering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Math rendering in HTML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options for wrapper scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Exit codes

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Defaults files

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General options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reader options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General writer options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options affecting specific writers . . . . . . . . . . . . . . . . . . . . . . . . . .
Citation rendering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Math rendering in HTML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options for wrapper scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Templates

Template syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Delimiters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interpolated variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conditionals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For loops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Partials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nesting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Breakable spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Contents
Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metadata variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Language variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for HTML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for HTML math . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for HTML slides . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for Beamer slides . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for PowerPoint . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for LaTeX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for ConTeXt . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for wkhtmltopdf . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for man pages . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for Texinfo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for Typst . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables for ms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables set automatically . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extensions

Typography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: smart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headings and sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: auto_identifiers . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: ascii_identifiers . . . . . . . . . . . . . . . . . . . . . . . .
Extension: gfm_auto_identifiers . . . . . . . . . . . . . . . . . . . . . . .
Math Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Raw HTML/TeX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Literate Haskell support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: literate_haskell . . . . . . . . . . . . . . . . . . . . . . . . .
Other extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: empty_paragraphs . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: native_numbering . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: xrefs_name . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: xrefs_number . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: amuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: raw_markdown . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: citations (typst) . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: citations (org) . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: citations (docx) . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: fancy_lists (org) . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: element_citations . . . . . . . . . . . . . . . . . . . . . . . .
Extension: ntb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pandoc’s Markdown

Philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Paragraphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: escaped_line_breaks . . . . . . . . . . . . . . . . . . . . . . .

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Headings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setext-style headings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ATX-style headings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: blank_before_header . . . . . . . . . . . . . . . . . . . . . . .
Extension: space_in_atx_header . . . . . . . . . . . . . . . . . . . . . . .
Heading identifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: header_attributes . . . . . . . . . . . . . . . . . . . . . . . .
Extension: implicit_header_references . . . . . . . . . . . . . . . . . . .
Block quotations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: blank_before_blockquote . . . . . . . . . . . . . . . . . . . . .
Verbatim (code) blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indented code blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fenced code blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: fenced_code_blocks . . . . . . . . . . . . . . . . . . . . . . . .
Extension: backtick_code_blocks . . . . . . . . . . . . . . . . . . . . . . .
Extension: fenced_code_attributes . . . . . . . . . . . . . . . . . . . . .
Line blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: line_blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bullet lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block content in list items . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordered lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: fancy_lists . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: startnum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: task_lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Definition lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: definition_lists . . . . . . . . . . . . . . . . . . . . . . . . .
Numbered example lists . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: example_lists . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ending a list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horizontal rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: table_captions . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: simple_tables . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: multiline_tables . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: grid_tables . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: pipe_tables . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metadata blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: pandoc_title_block . . . . . . . . . . . . . . . . . . . . . . . .
Extension: yaml_metadata_block . . . . . . . . . . . . . . . . . . . . . . .
Backslash escapes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: all_symbols_escapable . . . . . . . . . . . . . . . . . . . . . .
Inline formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emphasis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: intraword_underscores . . . . . . . . . . . . . . . . . . . . . .
Strikeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: strikeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Superscripts and subscripts . . . . . . . . . . . . . . . . . . . . . . . . . .

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Extension: superscript, subscript . . . . . . . . . . . . . . . . . . . . . .
Verbatim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: inline_code_attributes . . . . . . . . . . . . . . . . . . . . .
Underline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Small caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Highlighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Math . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: tex_math_dollars . . . . . . . . . . . . . . . . . . . . . . . . .
Raw HTML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: raw_html . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: markdown_in_html_blocks . . . . . . . . . . . . . . . . . . . . .
Extension: native_divs . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: native_spans . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: raw_tex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Generic raw attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: raw_attribute . . . . . . . . . . . . . . . . . . . . . . . . . . .
LaTeX macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: latex_macros . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inline links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: shortcut_reference_links . . . . . . . . . . . . . . . . . . . .
Internal links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Images . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: implicit_figures . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: link_attributes . . . . . . . . . . . . . . . . . . . . . . . . . .
Divs and Spans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: fenced_divs . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: bracketed_spans . . . . . . . . . . . . . . . . . . . . . . . . . .
Footnotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: footnotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: inline_notes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Citation syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: citations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-default extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: rebase_relative_paths . . . . . . . . . . . . . . . . . . . . . .
Extension: mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: old_dashes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: angle_brackets_escapable . . . . . . . . . . . . . . . . . . . .
Extension: lists_without_preceding_blankline . . . . . . . . . . . . . .
Extension: four_space_rule . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: spaced_reference_links . . . . . . . . . . . . . . . . . . . . .
Extension: hard_line_breaks . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: ignore_line_breaks . . . . . . . . . . . . . . . . . . . . . . . .
Extension: east_asian_line_breaks . . . . . . . . . . . . . . . . . . . . .
Extension: emoji . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Extension: tex_math_gfm . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: tex_math_single_backslash . . . . . . . . . . . . . . . . . . .
Extension: tex_math_double_backslash . . . . . . . . . . . . . . . . . . .
Extension: markdown_attribute . . . . . . . . . . . . . . . . . . . . . . . .
Extension: mmd_title_block . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: autolink_bare_uris . . . . . . . . . . . . . . . . . . . . . . . .
Extension: mmd_link_attributes . . . . . . . . . . . . . . . . . . . . . . .
Extension: mmd_header_identifiers . . . . . . . . . . . . . . . . . . . . .
Extension: compact_definition_lists . . . . . . . . . . . . . . . . . . . .
Extension: gutenberg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: sourcepos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension: short_subsuperscripts . . . . . . . . . . . . . . . . . . . . . .
Extension: wikilinks_title_after_pipe . . . . . . . . . . . . . . . . . . .
Markdown variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Citations

Specifying bibliographic data . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capitalization in titles . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conference Papers, Published vs. Unpublished . . . . . . . . . . . . . . . .
Specifying a citation style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Citations in note styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Placement of the bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Including uncited items in the bibliography . . . . . . . . . . . . . . . . . . . .
Other relevant metadata fields . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Slide shows

Structuring the slide show . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PowerPoint layout choice . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Incremental lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting pauses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Styling the slides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speaker notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Columns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional columns attributes in beamer . . . . . . . . . . . . . . . . . . .
Frame attributes in beamer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Background in reveal.js, beamer, and pptx . . . . . . . . . . . . . . . . . . . . .
On all slides (beamer, reveal.js, pptx) . . . . . . . . . . . . . . . . . . . . .
On individual slides (reveal.js, pptx) . . . . . . . . . . . . . . . . . . . . . .
On the title slide (reveal.js, pptx) . . . . . . . . . . . . . . . . . . . . . . . .
Example (reveal.js) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPUBs

EPUB Metadata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The epub:type attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Linked media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPUB styling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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vii

Contents
Chunked HTML139

Jupyter notebooks

141

Syntax highlighting

145

Custom Styles

147

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Custom readers and writers

151

Reproducible builds

153

Accessible PDFs and PDF archiving standards

155

ConTeXt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WeasyPrint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prince XML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Word Processors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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156

Running pandoc as a web server

157

Running pandoc as a Lua interpreter

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A note on security

161

Authors163

viii

Synopsis
pandoc [options] [input-file]…

1

Description
Pandoc is a Haskell library for converting from one markup format to another, and acommand-line tool that uses this library.
Pandoc can convert between numerous markup and word processing formats, including,but not limited to, various flavors of Markdown, HTML, LaTeX and Word docx. For thefull lists of input and output formats, see the --from and --to options below. Pandoc canalso produce PDF output: see creating a PDF, below.
Pandoc’s enhanced version of Markdown includes syntax for tables, definition lists, metadata blocks, footnotes, citations, math, and much more. See below under Pandoc’s Markdown.
Pandoc has a modular design: it consists of a set of readers, which parse text in a given
format and produce a native representation of the document (an abstract syntax tree or AST),
and a set of writers, which convert this native representation into a target format. Thus,
adding an input or output format requires only adding a reader or writer. Users can also
run custom pandoc filters to modify the intermediate AST.
Because pandoc’s intermediate representation of a document is less expressive than manyof the formats it converts between, one should not expect perfect conversions between every
format and every other. Pandoc attempts to preserve the structural elements of a document,
but not formatting details such as margin size. And some document elements, such ascomplex tables, may not fit into pandoc’s simple document model. While conversions frompandoc’s Markdown to all formats aspire to be perfect, conversions from formats more
expressive than pandoc’s Markdown can be expected to be lossy.

Using pandoc
If no input-files are specified, input is read from stdin. Output goes to stdout by default. For
output to a file, use the -o option:
pandoc -o output.html input.txt

By default, pandoc produces a document fragment. To produce a standalone document(e.g. a valid HTML file including <head> and <body>), use the -s or --standalone flag:3

Description
pandoc -s -o output.html input.txt

For more information on how standalone documents are produced, see Templates below.
If multiple input files are given, pandoc will concatenate them all (with blank lines betweenthem) before parsing. (Use --file-scope to parse files individually.)

Specifying formats
The format of the input and output can be specified explicitly using command-line options.
The input format can be specified using the -f/--from option, the output format using the-t/--to option. Thus, to convert hello.txt from Markdown to LaTeX, you could type:
pandoc -f markdown -t latex hello.txt

To convert hello.html from HTML to Markdown:
pandoc -f html -t markdown hello.html

Supported input and output formats are listed below under Options (see -f for input formats
and -t for output formats). You can also use pandoc --list-input-formats and pandoc--list-output-formats to print lists of supported formats.
If the input or output format is not specified explicitly, pandoc will attempt to guess it fromthe extensions of the filenames. Thus, for example,
pandoc -o hello.tex hello.txt

will convert hello.txt from Markdown to LaTeX. If no output file is specified (so that
output goes to stdout), or if the output file’s extension is unknown, the output format will
default to HTML. If no input file is specified (so that input comes from stdin), or if the input
files’ extensions are unknown, the input format will be assumed to be Markdown.

Character encoding
Pandoc uses the UTF-8 character encoding for both input and output. If your local character
encoding is not UTF-8, you should pipe input and output through iconv:
iconv -t utf-8 input.txt | pandoc | iconv -f utf-8

Note that in some output formats (such as HTML, LaTeX, ConTeXt, RTF, OPML, DocBook,
and Texinfo), information about the character encoding is included in the document header,which will only be included if you use the -s/--standalone option.

4

Creating a PDF

Creating a PDF
To produce a PDF, specify an output file with a .pdf extension:
pandoc test.txt -o test.pdf

By default, pandoc will use LaTeX to create the PDF, which requires that a LaTeX engine
be installed (see --pdf-engine below). Alternatively, pandoc can use ConTeXt, roff ms, orHTML as an intermediate format. To do this, specify an output file with a .pdf extension, as
before, but add the --pdf-engine option or -t context, -t html, or -t ms to the commandline. The tool used to generate the PDF from the intermediate format may be specified using--pdf-engine.
You can control the PDF style using variables, depending on the intermediate format used:
see variables for LaTeX, variables for ConTeXt, variables for wkhtmltopdf, variables for ms.
When HTML is used as an intermediate format, the output can be styled using --css.
To debug the PDF creation, it can be useful to look at the intermediate representation:
instead of -o test.pdf, use for example -s -o test.tex to output the generated LaTeX.
You can then test it with pdflatex test.tex.
When using LaTeX, the following packages need to be available (they are included with all
recent versions of TeX Live): amsfonts, amsmath, lm, unicode-math, iftex, listings (if the--listings option is used), fancyvrb, longtable, booktabs, [multirow] (if the document
contains a table with cells that cross multiple rows), graphicx (if the document contains
images), bookmark, xcolor, soul, geometry (with the geometry variable set), setspace (withlinestretch), and babel (with lang). If CJKmainfont is set, xeCJK is needed if xelatex isused, else luatexja is needed if lualatex is used. framed is required if code is highlighted ina scheme that use a colored background. The use of xelatex or lualatex as the PDF engine
requires fontspec. lualatex uses selnolig and lua-ul. xelatex uses bidi (with the dirvariable set). If the mathspec variable is set, xelatex will use mathspec instead of unicodemath. The upquote and microtype packages are used if available, and csquotes will be used
for typography if the csquotes variable or metadata field is set to a true value. The natbib,
biblatex, bibtex, and biber packages can optionally be used for citation rendering. The
following packages will be used to improve output quality if present, but pandoc does
not require them to be present: upquote (for straight quotes in verbatim environments),
microtype (for better spacing adjustments), parskip (for better inter-paragraph spaces),
xurl (for better line breaks in URLs), and footnotehyper or footnote (to allow footnotes
in tables).

Reading from the Web
Instead of an input file, an absolute URI may be given. In this case pandoc will fetch thecontent using HTTP:

5Description
pandoc -f html -t markdown https://www.fsf.org

It is possible to supply a custom User-Agent string or other header when requesting a
document from a URL:
pandoc -f html -t markdown --request-header User-Agent:"Mozilla/5.0" \https://www.fsf.org

6

Options
General options-f FORMAT, -r FORMAT, --from=FORMAT, --read=FORMAT Specify input format. FOR-

MAT can be:• bibtex (BibTeX bibliography)• biblatex (BibLaTeX bibliography)• bits (BITS XML, alias for jats)• commonmark (CommonMark Markdown)• commonmark_x (CommonMark Markdown with extensions)• creole (Creole 1.0)
• csljson (CSL JSON bibliography)• csv (CSV table)• tsv (TSV table)• djot (Djot markup)• docbook (DocBook)• docx (Word docx)• dokuwiki (DokuWiki markup)• endnotexml (EndNote XML bibliography)• epub (EPUB)• fb2 (FictionBook2 e-book)• gfm (GitHub-Flavored Markdown), or the deprecated and less accurate
markdown_github; use markdown_github only if you need extensions notsupported in gfm.
• haddock (Haddock markup)• html (HTML)• ipynb (Jupyter notebook)• jats (JATS XML)• jira (Jira/Confluence wiki markup)• json (JSON version of native AST)
• latex (LaTeX)• markdown (Pandoc’s Markdown)• markdown_mmd (MultiMarkdown)• markdown_phpextra (PHP Markdown Extra)• markdown_strict (original unextended Markdown)

7

Options• mediawiki (MediaWiki markup)• man (roff man)• muse (Muse)• native (native Haskell)• odt (OpenOffice text document)• opml (OPML)• org (Emacs Org mode)• ris (RIS bibliography)• rtf (Rich Text Format)• rst (reStructuredText)• t2t (txt2tags)• textile (Textile)• tikiwiki (TikiWiki markup)• twiki (TWiki markup)• typst (typst)• vimwiki (Vimwiki)• the path of a custom Lua reader, see Custom readers and writers below
Extensions can be individually enabled or disabled by appending +EXTENSION or EXTENSION to the format name. See Extensions below, for a list of extensions and theirnames. See --list-input-formats and --list-extensions, below.
-t FORMAT, -w FORMAT, --to=FORMAT, --write=FORMAT Specify output format. FOR-

MAT can be:• ansi (text with ANSI escape codes, for terminal viewing)• asciidoc (modern AsciiDoc as interpreted by AsciiDoctor)• asciidoc_legacy (AsciiDoc as interpreted by asciidoc-py).
• asciidoctor (deprecated synonym for asciidoc)• beamer (LaTeX beamer slide show)• bibtex (BibTeX bibliography)• biblatex (BibLaTeX bibliography)• chunkedhtml (zip archive of multiple linked HTML files)• commonmark (CommonMark Markdown)• commonmark_x (CommonMark Markdown with extensions)• context (ConTeXt)• csljson (CSL JSON bibliography)• djot (Djot markup)• docbook or docbook4 (DocBook 4)• docbook5 (DocBook 5)• docx (Word docx)• dokuwiki (DokuWiki markup)• epub or epub3 (EPUB v3 book)• epub2 (EPUB v2)• fb2 (FictionBook2 e-book)8

General options• gfm (GitHub-Flavored Markdown), or the deprecated and less accurate
markdown_github; use markdown_github only if you need extensions notsupported in gfm.
• haddock (Haddock markup)• html or html5 (HTML, i.e. HTML5/XHTML polyglot markup)• html4 (XHTML 1.0 Transitional)• icml (InDesign ICML)• ipynb (Jupyter notebook)• jats_archiving (JATS XML, Archiving and Interchange Tag Set)
• jats_articleauthoring (JATS XML, Article Authoring Tag Set)
• jats_publishing (JATS XML, Journal Publishing Tag Set)
• jats (alias for jats_archiving)• jira (Jira/Confluence wiki markup)• json (JSON version of native AST)
• latex (LaTeX)• man (roff man)
• markdown (Pandoc’s Markdown)• markdown_mmd (MultiMarkdown)• markdown_phpextra (PHP Markdown Extra)• markdown_strict (original unextended Markdown)• markua (Markua)• mediawiki (MediaWiki markup)• ms (roff ms)• muse (Muse)• native (native Haskell)• odt (OpenOffice text document)• opml (OPML)• opendocument (OpenDocument)• org (Emacs Org mode)• pdf (PDF)• plain (plain text)• pptx (PowerPoint slide show)• rst (reStructuredText)• rtf (Rich Text Format)• texinfo (GNU Texinfo)• textile (Textile)• slideous (Slideous HTML and JavaScript slide show)• slidy (Slidy HTML and JavaScript slide show)• dzslides (DZSlides HTML5 + JavaScript slide show)• revealjs (reveal.js HTML5 + JavaScript slide show)• s5 (S5 HTML and JavaScript slide show)• tei (TEI Simple)• typst (typst)

9Options• xwiki (XWiki markup)• zimwiki (ZimWiki markup)• the path of a custom Lua writer, see Custom readers and writers below
Note that odt, docx, epub, and pdf output will not be directed to stdout unless forced
with -o -.
Extensions can be individually enabled or disabled by appending +EXTENSION or EXTENSION to the format name. See Extensions below, for a list of extensions and theirnames. See --list-output-formats and --list-extensions, below.
-o FILE, --output=FILE Write output to FILE instead of stdout. If FILE is -, output will go

to stdout, even if a non-textual format (docx, odt, epub2, epub3) is specified. If theoutput format is chunkedhtml and FILE has no extension, then instead of producing a.zip file pandoc will create a directory FILE and unpack the zip archive there (unless
FILE already exists, in which case an error will be raised).
--data-dir=DIRECTORY Specify the user data directory to search for pandoc data files.

If this option is not specified, the default user data directory will be used. On *nix
and macOS systems this will be the pandoc subdirectory of the XDG data directory(by default, $HOME/.local/share, overridable by setting the XDG_DATA_HOME environment variable). If that directory does not exist and $HOME/.pandoc exists, it will be
used (for backwards compatibility). On Windows the default user data directory
is %APPDATA%\pandoc. You can find the default user data directory on your system
by looking at the output of pandoc --version. Data files placed in this directory(for example, reference.odt, reference.docx, epub.css, templates) will override
pandoc’s normal defaults. (Note that the user data directory is not created by pandoc,
so you will need to create it yourself if you want to make use of it.)-d FILE, --defaults=FILE Specify a set of default option settings. FILE is a YAML filewhose fields correspond to command-line option settings. All options for document
conversion, including input and output files, can be set using a defaults file. The
file will be searched for first in the working directory, and then in the defaults
subdirectory of the user data directory (see --data-dir). The .yaml extension may beomitted. See the section Defaults files for more information on the file format. Settingsfrom the defaults file may be overridden or extended by subsequent options on thecommand line.
--bash-completion Generate a bash completion script. To enable bash completion withpandoc, add this to your .bashrc:
eval "$(pandoc --bash-completion)"--verbose Give verbose debugging output.
--quiet Suppress warning messages.
--fail-if-warnings[=true|false] Exit with error status if there are any warnings.

10

Reader options--log=FILE Write log messages in machine-readable JSON format to FILE. All messages

above DEBUG level will be written, regardless of verbosity settings (--verbose, -quiet).
--list-input-formats List supported input formats, one per line.
--list-output-formats List supported output formats, one per line.
--list-extensions[=FORMAT ] List supported extensions for FORMAT, one per line, pre-ceded by a + or - indicating whether it is enabled by default in FORMAT. If FORMAT
is not specified, defaults for pandoc’s Markdown are given.
--list-highlight-languages List supported languages for syntax highlighting, one perline.
--list-highlight-styles List supported styles for syntax highlighting, one per line. See--highlight-style.
-v, --version Print version.
-h, --help Show usage message.

Reader options--shift-heading-level-by=NUMBER Shift heading levels by a positive or negative in-teger. For example, with --shift-heading-level-by=-1, level 2 headings become
level 1 headings, and level 3 headings become level 2 headings. Headings cannot
have a level less than 1, so a heading that would be shifted below level 1 becomes aregular paragraph. Exception: with a shift of -N, a level-N heading at the beginning of
the document replaces the metadata title. --shift-heading-level-by=-1 is a good
choice when converting HTML or Markdown documents that use an initial level-1
heading for the document title and level-2+ headings for sections. --shift-headinglevel-by=1 may be a good choice for converting Markdown documents that use
level-1 headings for sections to HTML, since pandoc uses a level-1 heading to renderthe document title.
--base-header-level=NUMBER Deprecated. Use --shift-heading-level-by=X instead,where X = NUMBER - 1. Specify the base level for headings (defaults to 1).
--indented-code-classes=CLASSES Specify classes to use for indented code blocks—for

example, perl,numberLines or haskell. Multiple classes may be separated by spaces
or commas.
--default-image-extension=EXTENSION Specify a default extension to use when image

paths/URLs have no extension. This allows you to use the same source for formats that
require different kinds of images. Currently this option only affects the Markdown
and LaTeX readers.

11Options--file-scope[=true|false] Parse each file individually before combining for multifile

documents. This will allow footnotes in different files with the same identifiers towork as expected. If this option is set, footnotes and links will not work across files.
Reading binary files (docx, odt, epub) implies --file-scope.
If two or more files are processed using --file-scope, prefixes based on the filenames
will be added to identifiers in order to disambiguate them, and internal links will be
adjusted accordingly. For example, a header with identifier foo in subdir/file1.txt
will have its identifier changed to subdir__file1.txt__foo.
-F PROGRAM, --filter=PROGRAM Specify an executable to be used as a filter transform-ing the pandoc AST after the input is parsed and before the output is written. The
executable should read JSON from stdin and write JSON to stdout. The JSON must be
formatted like pandoc’s own JSON input and output. The name of the output format
will be passed to the filter as the first argument. Hence,
pandoc --filter ./caps.py -t latex

is equivalent topandoc -t json | ./caps.py latex | pandoc -f json -t latex

The latter form may be useful for debugging filters.
Filters may be written in any language. Text.Pandoc.JSON exports toJSONFilter tofacilitate writing filters in Haskell. Those who would prefer to write filters in python
can use the module pandocfilters, installable from PyPI. There are also pandoc filter
libraries in PHP, perl, and JavaScript/node.js.
In order of preference, pandoc will look for filters in
1. a specified full or relative path (executable or non-executable),
2. $DATADIR/filters (executable or non-executable) where $DATADIR is the user
data directory (see --data-dir, above),
3. $PATH (executable only).
Filters, Lua-filters, and citeproc processing are applied in the order specified on thecommand line.
-L SCRIPT, --lua-filter=SCRIPT Transform the document in a similar fashion as JSON

filters (see --filter), but use pandoc’s built-in Lua filtering system. The given Lua
script is expected to return a list of Lua filters which will be applied in order. EachLua filter must contain element-transforming functions indexed by the name of the
AST element on which the filter function should be applied.
The pandoc Lua module provides helper functions for element creation. It is always
loaded into the script’s Lua environment.

12

Reader options
See the Lua filters documentation for further details.
In order of preference, pandoc will look for Lua filters in
1. a specified full or relative path,
2. $DATADIR/filters where $DATADIR is the user data directory (see --data-dir,above).
Filters, Lua filters, and citeproc processing are applied in the order specified on thecommand line.
-M KEY [=VAL], --metadata=KEY [:VAL] Set the metadata field KEY to the value VAL. A

value specified on the command line overrides a value specified in the document
using YAML metadata blocks. Values will be parsed as YAML boolean or string values.
If no value is specified, the value will be treated as Boolean true. Like --variable,--metadata causes template variables to be set. But unlike --variable, --metadata
affects the metadata of the underlying document (which is accessible from filters andmay be printed in some output formats) and metadata values will be escaped wheninserted into the template.
--metadata-file=FILE Read metadata from the supplied YAML (or JSON) file. This option

can be used with every input format, but string scalars in the metadata file will always
be parsed as Markdown. (If the input format is Markdown or a Markdown variant,then the same variant will be used to parse the metadata file; if it is a non-Markdown
format, pandoc’s default Markdown extensions will be used.) This option can be used
repeatedly to include multiple metadata files; values in files specified later on thecommand line will be preferred over those specified in earlier files. Metadata values
specified inside the document, or by using -M, overwrite values specified with thisoption. The file will be searched for first in the working directory, and then in themetadata subdirectory of the user data directory (see --data-dir).
-p, --preserve-tabs[=true|false] Preserve tabs instead of converting them to spaces.

(By default, pandoc converts tabs to spaces before parsing its input.) Note that thiswill only affect tabs in literal code spans and code blocks. Tabs in regular text arealways treated as spaces.
--tab-stop=NUMBER Specify the number of spaces per tab (default is 4).
--track-changes=accept|reject|all Specifies what to do with insertions, deletions, andcomments produced by the MS Word “Track Changes” feature. accept (the default)
processes all the insertions and deletions. reject ignores them. Both accept andreject ignore comments. all includes all insertions, deletions, and comments,
wrapped in spans with insertion, deletion, comment-start, and comment-end
classes, respectively. The author and time of change is included. all is useful for
scripting: only accepting changes from a certain reviewer, say, or before a certain
date. If a paragraph is inserted or deleted, track-changes=all produces a span with13

Options
the class paragraph-insertion/paragraph-deletion before the affected paragraphbreak. This option only affects the docx reader.
--extract-media=DIR Extract images and other media contained in or linked from thesource document to the path DIR, creating it if necessary, and adjust the images
references in the document so they point to the extracted files. Media are downloaded,
read from the file system, or extracted from a binary container (e.g. docx), as needed.
The original file paths are used if they are relative paths not containing ... Otherwise
filenames are constructed from the SHA1 hash of the contents.
--abbreviations=FILE Specifies a custom abbreviations file, with abbreviations one to aline. If this option is not specified, pandoc will read the data file abbreviations fromthe user data directory or fall back on a system default. To see the system default, use
pandoc --print-default-data-file=abbreviations. The only use pandoc makesof this list is in the Markdown reader. Strings found in this list will be followed by anonbreaking space, and the period will not produce sentence-ending space in formats
like LaTeX. The strings may not contain spaces.
--trace[=true|false] Print diagnostic output tracing parser progress to stderr. This

option is intended for use by developers in diagnosing performance issues.

General writer options-s, --standalone Produce output with an appropriate header and footer (e.g. a standalone

HTML, LaTeX, TEI, or RTF file, not a fragment). This option is set automatically for
pdf, epub, epub3, fb2, docx, and odt output. For native output, this option causes
metadata to be included; otherwise, metadata is suppressed.
--template=FILE|URL Use the specified file as a custom template for the generated doc-

ument. Implies --standalone. See Templates, below, for a description of template
syntax. If no extension is specified, an extension corresponding to the writer will be
added, so that --template=special looks for special.html for HTML output. If thetemplate is not found, pandoc will search for it in the templates subdirectory of theuser data directory (see --data-dir). If this option is not used, a default templateappropriate for the output format will be used (see -D/--print-default-template).
-V KEY [=VAL], --variable=KEY [:VAL] Set the template variable KEY to the value VAL

when rendering the document in standalone mode. If no VAL is specified, the key
will be given the value true.
--sandbox[=true|false] Run pandoc in a sandbox, limiting IO operations in readers andwriters to reading the files specified on the command line. Note that this option does
not limit IO operations by filters or in the production of PDF documents. But it does
offer security against, for example, disclosure of files through the use of include
directives. Anyone using pandoc on untrusted user input should use this option.

14

General writer options
Note: some readers and writers (e.g., docx) need access to data files. If these are stored
on the file system, then pandoc will not be able to find them when run in --sandbox
mode and will raise an error. For these applications, we recommend using a pandoc
binary compiled with the embed_data_files option, which causes the data files to be
baked into the binary instead of being stored on the file system.
-D FORMAT, --print-default-template=FORMAT Print the system default template foran output FORMAT. (See -t for a list of possible FORMATs.) Templates in the user
data directory are ignored. This option may be used with -o/--output to redirect
output to a file, but -o/--output must come before --print-default-template on
the command line.
Note that some of the default templates use partials, for example styles.html. To
print the partials, use --print-default-data-file: for example, --print-defaultdata-file=templates/styles.html.
--print-default-data-file=FILE Print a system default data file. Files in the user data

directory are ignored. This option may be used with -o/--output to redirect output
to a file, but -o/--output must come before --print-default-data-file on thecommand line.
--eol=crlf|lf|native Manually specify line endings:

crlf (Windows), lf (ma-cOS/Linux/UNIX), or native (line endings appropriate to the OS on which pandoc
is being run). The default is native.
--dpi=NUMBER Specify the default dpi (dots per inch) value for conversion from pixels toinch/centimeters and vice versa. (Technically, the correct term would be ppi: pixels
per inch.) The default is 96dpi. When images contain information about dpi internally,
the encoded value is used instead of the default specified by this option.
--wrap=auto|none|preserve Determine how text is wrapped in the output (the source code,

not the rendered version). With auto (the default), pandoc will attempt to wrap lines
to the column width specified by --columns (default 72). With none, pandoc will not
wrap lines at all. With preserve, pandoc will attempt to preserve the wrapping fromthe source document (that is, where there are nonsemantic newlines in the source,
there will be nonsemantic newlines in the output as well). In ipynb output, this option
affects wrapping of the contents of Markdown cells.
--columns=NUMBER Specify length of lines in characters. This affects text wrapping in thegenerated source code (see --wrap). It also affects calculation of column widths forplain text tables (see Tables below).
--toc[=true|false], --table-of-contents[=true|false] Include an automatically gen-erated table of contents (or, in the case of latex, context, docx, odt, opendocument,
rst, or ms, an instruction to create one) in the output document. This option has no effect unless -s/--standalone is used, and it has no effect on man, docbook4, docbook5,
or jats output.

15

Options
Note that if you are producing a PDF via ms, the table of contents will appear at the
beginning of the document, before the title. If you would prefer it to be at the end of
the document, use the option --pdf-engine-opt=--no-toc-relocation.
--toc-depth=NUMBER Specify the number of section levels to include in the table of con-tents. The default is 3 (which means that level-1, 2, and 3 headings will be listed in thecontents).
--strip-comments[=true|false] Strip out HTML comments in the Markdown or Textile

source, rather than passing them on to Markdown, Textile or HTML output as raw
HTML. This does not apply to HTML comments inside raw HTML blocks when themarkdown_in_html_blocks extension is not set.
--no-highlight Disables syntax highlighting for code blocks and inlines, even when alanguage attribute is given.
--highlight-style=STYLE|FILE Specifies the coloring style to be used in highlighted

source code. Options are pygments (the default), kate, monochrome, breezeDark,
espresso, zenburn, haddock, and tango. For more information on syntax highlighting
in pandoc, see Syntax highlighting, below. See also --list-highlight-styles.
Instead of a STYLE name, a JSON file with extension .theme may be supplied. This will
be parsed as a KDE syntax highlighting theme and (if valid) used as the highlighting
style.
To generate the JSON version of an existing style, use --print-highlight-style.
--print-highlight-style=STYLE|FILE Prints a JSON version of a highlighting style,which can be modified, saved with a .theme extension, and used with --highlightstyle. This option may be used with -o/--output to redirect output to a file, but-o/--output must come before --print-highlight-style on the command line.
--syntax-definition=FILE Instructs pandoc to load a KDE XML syntax definition file,which will be used for syntax highlighting of appropriately marked code blocks. Thiscan be used to add support for new languages or to use altered syntax definitions forexisting languages. This option may be repeated to add multiple syntax definitions.
-H FILE, --include-in-header=FILE|URL Include contents of FILE, verbatim, at the end of

the header. This can be used, for example, to include special CSS or JavaScript inHTML documents. This option can be used repeatedly to include multiple files in theheader. They will be included in the order specified. Implies --standalone.
-B FILE, --include-before-body=FILE|URL Include contents of FILE, verbatim, at the

beginning of the document body (e.g. after the <body> tag in HTML, or the\begin{document} command in LaTeX). This can be used to include navigation bars
or banners in HTML documents. This option can be used repeatedly to include
multiple files. They will be included in the order specified. Implies --standalone.
Note that if the output format is odt, this file must be in OpenDocument XML format

16

Options affecting specific writers
suitable for insertion into the body of the document, and if the output is docx, this file
must be in appropriate OpenXML format.
-A FILE, --include-after-body=FILE|URL Include contents of FILE, verbatim, at the endof the document body (before the </body> tag in HTML, or the \end{document}command in LaTeX). This option can be used repeatedly to include multiple files.
They will be included in the order specified. Implies --standalone. Note that if theoutput format is odt, this file must be in OpenDocument XML format suitable for
insertion into the body of the document, and if the output is docx, this file must be inappropriate OpenXML format.
--resource-path=SEARCHPATH List of paths to search for images and other resources.

The paths should be separated by : on Linux, UNIX, and macOS systems, and by ; on
Windows. If --resource-path is not specified, the default resource path is the working
directory. Note that, if --resource-path is specified, the working directory must be
explicitly listed or it will not be searched. For example: --resource-path=.:test will
search the working directory and the test subdirectory, in that order. This option
can be used repeatedly. Search path components that come later on the commandline will be searched before those that come earlier, so --resource-path foo:bar -resource-path baz:bim is equivalent to --resource-path baz:bim:foo:bar. Notethat this option only has an effect when pandoc itself needs to find an image (e.g.,in producing a PDF or docx, or when --embed-resources is used.) It will not cause
image paths to be rewritten in other cases (e.g., when pandoc is generating LaTeX orHTML).
--request-header=NAME :VAL Set the request header NAME to the value VAL when mak-ing HTTP requests (for example, when a URL is given on the command line, or whenresources used in a document must be downloaded). If you’re behind a proxy, youalso need to set the environment variable http_proxy to http://....
--no-check-certificate[=true|false] Disable the certificate verification to allow accessto unsecure HTTP resources (for example when the certificate is no longer valid orself signed).

Options affecting specific writers--self-contained[=true|false] Deprecatedsynonymfor--embed-resources --standalone.
--embed-resources[=true|false] Produce a standalone HTML file with no external

dependencies, using data: URIs to incorporate the contents of linked scripts,
stylesheets, images, and videos. The resulting file should be “self-contained,” in thesense that it needs no external files and no net access to be displayed properly bya browser. This option works only with HTML output formats, including html4,
html5, html+lhs, html5+lhs, s5, slidy, slideous, dzslides, and revealjs. Scripts,

17

Options
images, and stylesheets at absolute URLs will be downloaded; those at relative
URLs will be sought relative to the working directory (if the first source file is local)
or relative to the base URL (if the first source file is remote). Elements with theattribute data-external="1" will be left alone; the documents they link to will not be
incorporated in the document. Limitation: resources that are loaded dynamicallythrough JavaScript cannot be incorporated; as a result, fonts may be missing when--mathjax is used, and some advanced features (e.g. zoom or speaker notes) may notwork in an offline “self-contained” reveal.js slide show.
For SVG images, img tags with data: URIs are used, unless the image has the class
inline-svg, in which case an inline SVG element is inserted. This approach is recommended when there are many occurrences of the same SVG in a document, as <use>elements will be used to reduce duplication.
--link-images[=true|false] Include links to images instead of embedding the images

in ODT. (This option currently only affects ODT output.)--html-q-tags[=true|false] Use <q> tags for quotes in HTML. (This option only has aneffect if the smart extension is enabled for the input format used.)--ascii[=true|false] Use only ASCII characters in output. Currently supported for XML

and HTML formats (which use entities instead of UTF-8 when this option is selected),
CommonMark, gfm, and Markdown (which use entities), roff man and ms (which use
hexadecimal escapes), and to a limited degree LaTeX (which uses standard commands
for accented characters when possible).
--reference-links[=true|false] Use reference-style links, rather than inline links, inwriting Markdown or reStructuredText. By default inline links are used. The placement of link references is affected by the --reference-location option.
--reference-location=block|section|document Specify whether footnotes (and refer-ences, if reference-links is set) are placed at the end of the current (top-level)
block, the current section, or the document. The default is document. Currently thisoption only affects the markdown, muse, html, epub, slidy, s5, slideous, dzslides,
and revealjs writers. In slide formats, specifying --reference-location=section
will cause notes to be rendered at the bottom of a slide.
--figure-caption-position=above|below Specify whether figure captions go above or

below figures (default is below). This option only affects HTML, LaTeX, Docx, ODT,and Typst output.
--table-caption-position=above|below Specify whether table captions go above or be-

low tables (default is above). This option only affects HTML, LaTeX, Docx, ODT, andTypst output.
--markdown-headings=setext|atx Specify whether to use ATX-style (#-prefixed) or Setext-

style (underlined) headings for level 1 and 2 headings in Markdown output. (The18

Options affecting specific writers
default is atx.) ATX-style headings are always used for levels 3+. This option also
affects Markdown cells in ipynb output.
--list-tables[=true|false] Render tables as list tables in RST output.
--top-level-division=default|section|chapter|part Treat top-level headings as thegiven division type in LaTeX, ConTeXt, DocBook, and TEI output. The hierarchy
order is part, chapter, then section; all headings are shifted such that the top-level
heading becomes the specified type. The default behavior is to determine the best
division type via heuristics: unless other conditions apply, section is chosen. Whenthe documentclass variable is set to report, book, or memoir (unless the article
option is specified), chapter is implied as the setting for this option. If beamer is theoutput format, specifying either chapter or part will cause top-level headings to
become \part{..}, while second-level headings remain as their default type.
-N, --number-sections=[true|false] Number section headings in LaTeX, ConTeXt,

HTML, Docx, ms, or EPUB output. By default, sections are not numbered. Sections
with class unnumbered will never be numbered, even if --number-sections is
specified.
--number-offset=NUMBER[,NUMBER ,…] Offsets for section heading numbers. The firstnumber is added to the section number for level-1 headings, the second for level-2
headings, and so on. So, for example, if you want the first level-1 heading in yourdocument to be numbered “6” instead of “1”, specify --number-offset=5. If yourdocument starts with a level-2 heading which you want to be numbered “1.5”, specify--number-offset=1,4. --number-offset only directly affects the number of the firstsection heading in a document; subsequent numbers increment in the normal way.
Implies --number-sections. Currently this feature only affects HTML and Docx
output.
--listings[=true|false] Use the listings package for LaTeX code blocks. The package

does not support multi-byte encoding for source code. To handle UTF-8 you would
need to use a custom template. This issue is fully documented here: Encoding issue
with the listings package.
-i, --incremental[=true|false] Make list items in slide shows display incrementally(one by one). The default is for lists to be displayed all at once.
--slide-level=NUMBER Specifies that headings with the specified level create slides (forbeamer, revealjs, pptx, s5, slidy, slideous, dzslides). Headings above this level inthe hierarchy are used to divide the slide show into sections; headings below this level
create subheads within a slide. Valid values are 0-6. If a slide level of 0 is specified,slides will not be split automatically on headings, and horizontal rules must be used
to indicate slide boundaries. If a slide level is not specified explicitly, the slide level
will be set automatically based on the contents of the document; see Structuring theslide show.

19

Options--section-divs[=true|false] Wrap sections in <section> tags (or <div> tags for html4),

and attach identifiers to the enclosing <section> (or <div>) rather than the heading
itself (see Heading identifiers, below). This option only affects HTML output (anddoes not affect HTML slide formats).
--email-obfuscation=none|javascript|references Specify a method for obfuscat-

ing mailto: links in HTML documents. none leaves mailto: links as they are.
javascript obfuscates them using JavaScript. references obfuscates them byprinting their letters as decimal or hexadecimal character references. The default isnone.
--id-prefix=STRING Specify a prefix to be added to all identifiers and internal links inHTML and DocBook output, and to footnote numbers in Markdown and Haddock
output. This is useful for preventing duplicate identifiers when generating fragments
to be included in other pages.
-T STRING, --title-prefix=STRING Specify STRING as a prefix at the beginning of thetitle that appears in the HTML header (but not in the title as it appears at the beginningof the HTML body). Implies --standalone.
-c URL, --css=URL Link to a CSS style sheet. This option can be used repeatedly to include

multiple files. They will be included in the order specified. This option only affects
HTML (including HTML slide shows) and EPUB output. It should be used together
with -s/--standalone, because the link to the stylesheet goes in the document header.
A stylesheet is required for generating EPUB. If none is provided using this option(or the css or stylesheet metadata fields), pandoc will look for a file epub.css in theuser data directory (see --data-dir). If it is not found there, sensible defaults will be
used.
--reference-doc=FILE|URL Use the specified file as a style reference in producing a docx

or ODT file.
Docx For best results, the reference docx should be a modified version of a docx fileproduced using pandoc. The contents of the reference docx are ignored, but its
stylesheets and document properties (including margins, page size, header, andfooter) are used in the new docx. If no reference docx is specified on the command
line, pandoc will look for a file reference.docx in the user data directory (see--data-dir). If this is not found either, sensible defaults will be used.
To produce a custom reference.docx, first get a copy of the default
reference.docx:
pandoc -o custom-reference.docx --print-defaultdata-file reference.docx. Then open custom-reference.docx in Word,
modify the styles as you wish, and save the file. For best results, do not makechanges to this file other than modifying the styles used by pandoc:
Paragraph styles:

20

Options affecting specific writers• Normal• Body Text
• First Paragraph• Compact• Title• Subtitle• Author• Date• Abstract• AbstractTitle• Bibliography• Heading 1• Heading 2• Heading 3• Heading 4• Heading 5• Heading 6• Heading 7• Heading 8• Heading 9• Block Text [for block quotes]• Footnote Block Text [for block quotes in footnotes]• Source Code• Footnote Text
• Definition Term
• Definition• Caption• Table Caption• Image Caption• Figure• Captioned Figure• TOC Heading
Character styles:• Default Paragraph Font
• Body Text Char• Verbatim Char• Footnote Reference• Hyperlink• Section Number
Table style:• Table21

OptionsODT For best results, the reference ODT should be a modified version of an ODTproduced using pandoc. The contents of the reference ODT are ignored, but
its stylesheets are used in the new ODT. If no reference ODT is specified on
the command line, pandoc will look for a file reference.odt in the user data
directory (see --data-dir). If this is not found either, sensible defaults will beused.
To produce a custom reference.odt, first get a copy of the default
reference.odt: pandoc -o custom-reference.odt --print-default-datafile reference.odt. Then open custom-reference.odt in LibreOffice, modify
the styles as you wish, and save the file.
PowerPoint Templates included with Microsoft PowerPoint 2013 (either with .pptx

or .potx extension) are known to work, as are most templates derived from these.
The specific requirement is that the template should contain layouts with thefollowing names (as seen within PowerPoint):• Title Slide• Title and Content• Section Header• Two Content• Comparison• Content with Caption• Blank
For each name, the first layout found with that name will be used. If no layout isfound with one of the names, pandoc will output a warning and use the layout
with that name from the default reference doc instead. (How these layouts areused is described in PowerPoint layout choice.)
All templates included with a recent version of MS PowerPoint will fit thesecriteria. (You can click on Layout under the Home menu to check.)
You can also modify the default reference.pptx: first run pandoc -o customreference.pptx --print-default-data-file reference.pptx,
and thenmodify custom-reference.pptx in MS PowerPoint (pandoc will use the layouts
with the names listed above).
--split-level=NUMBER Specify the heading level at which to split an EPUB or chunked

HTML document into separate files. The default is to split into chapters at level-1
headings. In the case of EPUB, this option only affects the internal composition of
the EPUB, not the way chapters and sections are displayed to users. Some readers
may be slow if the chapter files are too large, so for large documents with few level-1
headings, one might want to use a chapter level of 2 or 3. For chunked HTML, thisoption determines how much content goes in each “chunk.”

22

Options affecting specific writers--chunk-template=PATHTEMPLATE Specify a template for the filenames in a chunkedhtml

document. In the template, %n will be replaced by the chunk number (padded withleading 0s to 3 digits), %s with the section number of the chunk, %h with the heading
text (with formatting removed), %i with the section identifier. For example, %section%s-%i.html might be resolved to section-1.1-introduction.html. The characters/ and \ are not allowed in chunk templates and will be ignored. The default is%s-%i.html.
--epub-chapter-level=NUMBER Deprecated synonym for --split-level.
--epub-cover-image=FILE Use the specified image as the EPUB cover. It is recommended

that the image be less than 1000px in width and height. Note that in a Markdown
source document you can also specify cover-image in a YAML metadata block (seeEPUB Metadata, below).
--epub-title-page=true|false Determines whether a the title page is included in the

EPUB (default is true).
--epub-metadata=FILE Look in the specified XML file for metadata for the EPUB. The fileshould contain a series of Dublin Core elements. For example:<dc:rights>Creative Commons</dc:rights><dc:language>es-AR</dc:language>

By default, pandoc will include the following metadata elements: <dc:title> (fromthe document title), <dc:creator> (from the document authors), <dc:date> (from the
document date, which should be in ISO 8601 format), <dc:language> (from the langvariable, or, if is not set, the locale), and <dc:identifier id="BookId"> (a randomly
generated UUID). Any of these may be overridden by elements in the metadata file.
Note: if the source document is Markdown, a YAML metadata block in the document
can be used instead. See below under EPUB Metadata.
--epub-embed-font=FILE Embed the specified font in the EPUB. This option can be re-peated to embed multiple fonts. Wildcards can also be used: for example, DejaVuSans*.ttf. However, if you use wildcards on the command line, be sure to escape themor put the whole filename in single quotes, to prevent them from being interpretedby the shell. To use the embedded fonts, you will need to add declarations like thefollowing to your CSS (see --css):@font-face {font-family: DejaVuSans;
font-style: normal;
font-weight: normal;
src:url("../fonts/DejaVuSans-Regular.ttf");}@font-face {font-family: DejaVuSans;

23

Options
font-style: normal;
font-weight: bold;
src:url("../fonts/DejaVuSans-Bold.ttf");}@font-face {font-family: DejaVuSans;
font-style: italic;
font-weight: normal;
src:url("../fonts/DejaVuSans-Oblique.ttf");}@font-face {font-family: DejaVuSans;
font-style: italic;
font-weight: bold;
src:url("../fonts/DejaVuSans-BoldOblique.ttf");}
body { font-family: "DejaVuSans"; }--epub-subdirectory=DIRNAME Specify the subdirectory in the OCF container that is tohold the EPUB-specific contents. The default is EPUB. To put the EPUB contents in the
top level, use an empty string.
--ipynb-output=all|none|best Determines how ipynb output cells are treated. allmeans that all of the data formats included in the original are preserved. none meansthat the contents of data cells are omitted. best causes pandoc to try to pick therichest data block in each output cell that is compatible with the output format. The
default is best.
--pdf-engine=PROGRAM Use the specified engine when producing PDF output. Valid val-

ues are pdflatex, lualatex, xelatex, latexmk, tectonic, wkhtmltopdf, weasyprint,
pagedjs-cli, prince, context, pdfroff, and typst. If the engine is not in your PATH,
the full path of the engine may be specified here. If this option is not specified, pandoc
uses the following defaults depending on the output format specified using -t/--to:• -t latex or none: pdflatex (other options: xelatex, lualatex, tectonic,
latexmk)• -t context: context• -t html: weasyprint (other options: prince, wkhtmltopdf, pagedjs-cli; seeprint-css.rocks for a good introduction to PDF generation from HTML/CSS)• -t ms: pdfroff• -t typst: typst--pdf-engine-opt=STRING Use the given string as a command-line argument to the pdfengine. For example, to use a persistent directory foo for latexmk’s auxiliary files, use--pdf-engine-opt=-outdir=foo. Note that no check for duplicate options is done.

24Citation rendering

Citation rendering-C, --citeproc Process the citations in the file, replacing them with rendered citations andadding a bibliography. Citation processing will not take place unless bibliographic
data is supplied, either through an external file specified using the --bibliography
option or the bibliography field in metadata, or via a references section in metadata
containing a list of citations in CSL YAML format with Markdown formatting. The
style is controlled by a CSL stylesheet specified using the --csl option or the csl field
in metadata. (If no stylesheet is specified, the chicago-author-date style will be usedby default.) The citation processing transformation may be applied before or after
filters or Lua filters (see --filter, --lua-filter): these transformations are appliedin the order they appear on the command line. For more information, see the section
on Citations.
Note: if your target format is markdown, org, or typst, you will need to disable thecitations extension (e.g., -t markdown-citations) to see the rendered citations andbibliography. Otherwise the format’s own citation syntax will be used.
--bibliography=FILE Set the bibliography field in the document’s metadata to FILE,

overriding any value set in the metadata. If you supply this argument multiple times,
each FILE will be added to bibliography. If FILE is a URL, it will be fetched via HTTP.
If FILE is not found relative to the working directory, it will be sought in the resource
path (see --resource-path).
--csl=FILE Set the csl field in the document’s metadata to FILE, overriding any value set

in the metadata. (This is equivalent to --metadata csl=FILE.) If FILE is a URL, it will
be fetched via HTTP. If FILE is not found relative to the working directory, it will besought in the resource path (see --resource-path) and finally in the csl subdirectoryof the pandoc user data directory.
--citation-abbreviations=FILE Set the citation-abbreviations field in the docu-

ment’s metadata to FILE, overriding any value set in the metadata. (This is equivalentto --metadata citation-abbreviations=FILE.) If FILE is a URL, it will be fetched
via HTTP. If FILE is not found relative to the working directory, it will be sought in
the resource path (see --resource-path) and finally in the csl subdirectory of the
pandoc user data directory.
--natbib Use natbib for citations in LaTeX output. This option is not for use with the--citeproc option or with PDF output. It is intended for use in producing a LaTeX

file that can be processed with bibtex.
--biblatex Use biblatex for citations in LaTeX output. This option is not for use with the--citeproc option or with PDF output. It is intended for use in producing a LaTeX

file that can be processed with bibtex or biber.

25

Options

Math rendering in HTMLThe default is to render TeX math as far as possible using Unicode characters. Formulas
are put inside a span with class="math", so that they may be styled differently from thesurrounding text if needed. However, this gives acceptable results only for basic math,usually you will want to use --mathjax or another of the following options.
--mathjax[=URL] Use MathJax to display embedded TeX math in HTML output. TeX mathwill be put between \(...\) (for inline math) or \[...\] (for display math) andwrapped in <span> tags with class math. Then the MathJax JavaScript will render it.
The URL should point to the MathJax.js load script. If a URL is not provided, a linkto the Cloudflare CDN will be inserted.
--mathml Convert TeX math to MathML (in epub3, docbook4, docbook5, jats, html4 andhtml5). This is the default in odt output. MathML is supported natively by the main
web browsers and select e-book readers.
--webtex[=URL] Convert TeX formulas to <img> tags that link to an external script thatconverts formulas to images. The formula will be URL-encoded and concatenatedwith the URL provided. For SVG images you can for example use --webtex
https://latex.codecogs.com/svg.latex?. If no URL is specified, the CodeCogs
URL generating PNGs will be used (https://latex.codecogs.com/png.latex?).
Note: the --webtex option will affect Markdown output as well as HTML, which isuseful if you’re targeting a version of Markdown without native math support.
--katex[=URL] Use KaTeX to display embedded TeX math in HTML output. The URL is

the base URL for the KaTeX library. That directory should contain a katex.min.js
and a katex.min.css file. If a URL is not provided, a link to the KaTeX CDN will beinserted.
--gladtex Enclose TeX math in <eq> tags in HTML output. The resulting HTML can thenbe processed by GladTeX to produce SVG images of the typeset formulas and an
HTML file with these images embedded.
pandoc -s --gladtex input.md -o myfile.htex
gladtex -d image_dir myfile.htex# produces myfile.html and images in image_dir

Options for wrapper scripts--dump-args[=true|false] Print information about command-line arguments to stdout,

then exit. This option is intended primarily for use in wrapper scripts. The first lineof output contains the name of the output file specified with the -o option, or - (forstdout) if no output file was specified. The remaining lines contain the command-line
arguments, one per line, in the order they appear. These do not include regular pandoc

26

Options for wrapper scripts
options and their arguments, but do include any options appearing after a -- separator
at the end of the line.
--ignore-args[=true|false] Ignore command-line arguments (for use in wrapper

scripts). Regular pandoc options are not ignored. Thus, for example,
pandoc --ignore-args -o foo.html -s foo.txt -- -e latin1

is equivalent topandoc -o foo.html -s

27

Exit codes
If pandoc completes successfully, it will return exit code 0. Nonzero exit codes have thefollowing meanings:
Code
1
3
4
5
6
21
22
23
24
25
31
43
44
47
61
62
63
64
66
67
83
84
89
91
92
93
94
97
98
99

Error
PandocIOError
PandocFailOnWarningError
PandocAppError
PandocTemplateError
PandocOptionError
PandocUnknownReaderError
PandocUnknownWriterError
PandocUnsupportedExtensionError
PandocCiteprocError
PandocBibliographyError
PandocEpubSubdirectoryError
PandocPDFError
PandocXMLError
PandocPDFProgramNotFoundError
PandocHttpError
PandocShouldNeverHappenError
PandocSomeError
PandocParseError
PandocMakePDFError
PandocSyntaxMapError
PandocFilterError
PandocLuaError
PandocNoScriptingEngine
PandocMacroLoop
PandocUTF8DecodingError
PandocIpynbDecodingError
PandocUnsupportedCharsetError
PandocCouldNotFindDataFileError
PandocCouldNotFindMetadataFileError
PandocResourceNotFound

29

Defaults files
The --defaults option may be used to specify a package of options, in the form of a YAML
file.
Fields that are omitted will just have their regular default values. So a defaults file can be as
simple as one line:
verbosity: INFO

In fields that expect a file path (or list of file paths), the following syntax may be used tointerpolate environment variables:csl:${HOME}/mycsldir/special.csl${USERDATA} may also be used; this will always resolve to the user data directory that iscurrent when the defaults file is parsed, regardless of the setting of the environment variable
USERDATA.
${.} will resolve to the directory containing the defaults file itself. This allows you to referto resources contained in that directory:
epub-cover-image: ${.}/cover.jpg
epub-metadata: ${.}/meta.xml
resource-path:- .

# the working directory from which pandoc is run- ${.}/images# the images subdirectory of the directory# containing this defaults file

This environment variable interpolation syntax only works in fields that expect file paths.
Defaults files can be placed in the defaults subdirectory of the user data directory andused from any directory. For example, one could create a file specifying defaults for writing
letters, save it as letter.yaml in the defaults subdirectory of the user data directory, andthen invoke these defaults from any directory using pandoc --defaults letter or pandoc-dletter.
When multiple defaults are used, their contents will be combined.
Note that, where command-line arguments may be repeated (--metadata-file, --css,--include-in-header, --include-before-body, --include-after-body, --variable, -metadata, --syntax-definition), the values specified on the command line will combinewith values specified in the defaults file, rather than replacing them.

31Defaults files
The following tables show the mapping between the command line and defaults file entries.
command line

defaults file

foo.mdinput-file: foo.md

foo.md bar.md

input-files:- foo.md- bar.md

The value of input-files may be left empty to indicate input from stdin, and it can be an
empty sequence [] for no input.

General optionscommand line

defaults file--from markdown+emoji

from: markdown+emoji--to markdown+hard_line_breaks

reader: markdown+emoji
to: markdown+hard_line_breaks--output foo.pdf

writer: markdown+hard_line_breaks
output-file: foo.pdf--output -output-file:--data-dir dir

data-dir: dir--defaults filedefaults:--verbose- fileverbosity: INFO--quietverbosity: ERROR--fail-if-warnings

fail-if-warnings: true--sandbox

sandbox: true--log=FILE

log-file: FILE

Options specified in a defaults file itself always have priority over those in another fileincluded with a defaults: entry.
verbosity can have the values ERROR, WARNING, or INFO.

Reader options

32

General writer optionscommand line

defaults file--shift-heading-level-by -1

shift-heading-level-by: -1--indented-code-classes python

indented-code-classes:--default-image-extension ".jpg"- pythondefault-image-extension: '.jpg'--file-scopefile-scope: true--citeproc \filters:--lua-filter count-words.lua \- citeproc--filter special.lua- count-words.lua- type: json--metadata key=value \--metadata key2--metadata-file meta.yaml

path: special.lua
metadata:
key: value
key2: true
metadata-files:- meta.yaml--preserve-tabs

metadata-file: meta.yaml
preserve-tabs: true--tab-stop 8

tab-stop: 8--track-changes accept

track-changes: accept--extract-media dir

extract-media: dir--abbreviations abbrevs.txt

abbreviations: abbrevs.txt--tracetrace: true

Metadata values specified in a defaults file are parsed as literal string text, not Markdown.
Filters will be assumed to be Lua filters if they have the .lua extension, and JSON filters
otherwise. But the filter type can also be specified explicitly, as shown. Filters are run in
the order specified. To include the built-in citeproc filter, use either citeproc or {type:
citeproc}.

General writer optionscommand line

defaults file--standalone

standalone: true--template letter

template: letter--variable key=val \variables:--variable key2

key: val--eol nl

key2: true
eol: nl

33

Defaults files
command line

defaults file--dpi 300

dpi: 300--wrap 60

wrap: 60--columns 72

columns: 72--table-of-contents

table-of-contents: true--toc

toc: true--toc-depth 3

toc-depth: 3--strip-comments

strip-comments: true--no-highlighthighlight-style: null--highlight-style kate

highlight-style: kate--syntax-definition mylang.xml

syntax-definitions:- mylang.xml--include-in-header inc.tex

syntax-definition: mylang.xml
include-in-header:--include-before-body inc.tex- inc.tex
include-before-body:--include-after-body inc.tex- inc.tex
include-after-body:--resource-path .:foo- inc.tex
resource-path: ['.','foo']--request-header foo:bar

request-headers:--no-check-certificate- ["User-Agent", "Mozilla/5.0"]
no-check-certificate: true

Options affecting specific writers
command line

defaults file--self-contained

self-contained: true--link-images

link-images: true--html-q-tags

html-q-tags: true--ascii

ascii: true--reference-links

reference-links: true--reference-location blockreference-location: block--figure-caption-position=above

figure-caption-position: above--table-caption-position=below

table-caption-position: below--markdown-headings atx

markdown-headings: atx--list-tables

list-tables: true--top-level-division chapter

top-level-division: chapter--number-sections

number-sections: true--number-offset=1,4

number-offset: \[1,4\]

34

Citation renderingcommand line

defaults file--listings

listings: true--incremental

incremental: true--slide-level 2

slide-level: 2--section-divssection-divs: true--email-obfuscation references

email-obfuscation: references--id-prefix ch1

identifier-prefix: ch1--title-prefix MySite

title-prefix: MySite--css styles/screen.css\--css styles/special.css

css:- styles/screen.css--reference-doc my.docx- styles/special.css
reference-doc: my.docx--epub-cover-image cover.jpg

epub-cover-image: cover.jpg--epub-title-page=false

epub-title-page: false--epub-metadata meta.xml

epub-metadata: meta.xml--epub-embed-font special.otf \epub-fonts:--epub-embed-font headline.otf- special.otf--split-level 2- headline.otf
split-level: 2--chunk-template="%i.html"

chunk-template: "%i.html"--epub-subdirectory=""

epub-subdirectory: ''--ipynb-output best

ipynb-output: best--pdf-engine xelatex

pdf-engine: xelatex--pdf-engine-opt=--shell-escape

pdf-engine-opts:- '-shell-escape'
pdf-engine-opt: '-shell-escape'

Citation renderingcommand line

defaults file--citeproc

citeproc: true--bibliography logic.bib

bibliography: logic.bib--csl ieee.csl

csl: ieee.csl--citation-abbreviations ab.json

citation-abbreviations: ab.json--natbibcite-method: natbib--biblatex

cite-method: biblatex

cite-method can be citeproc, natbib, or biblatex. This only affects LaTeX output. If you

want to use citeproc to format citations, you should also set ‘citeproc: true’.

35

Defaults files
If you need control over when the citeproc processing is done relative to other filters, you
should instead use citeproc in the list of filters (see Reader options).

Math rendering in HTML
command line

defaults file--mathjax

html-math-method:--mathml

method: mathjax
html-math-method:--webtex

method: mathml
html-math-method:--katexmethod: webtex
html-math-method:--gladtex

method: katex
html-math-method:
method: gladtex

In addition to the values listed above, method can have the value plain.
If the command line option accepts a URL argument, an url: field can be added to htmlmath-method:.

Options for wrapper scripts
command line

defaults file--dump-args

dump-args: true--ignore-args

ignore-args: true36Templates
When the -s/--standalone option is used, pandoc uses a template to add header and footer
material that is needed for a self-standing document. To see the default template that isused, just type
pandoc -D *FORMAT*

where FORMAT is the name of the output format. A custom template can be specified using
the --template option. You can also override the system default templates for a given
output format FORMAT by putting a file templates/default.*FORMAT* in the user data
directory (see --data-dir, above). Exceptions:• For odt output, customize the default.opendocument template.
• For pdf output, customize the default.latex template (or the default.context template, if you use -t context, or the default.ms template, if you use -t ms, or thedefault.html template, if you use -t html).
• docx and pptx have no template (however, you can use --reference-doc to customize
the output).
Templates contain variables, which allow for the inclusion of arbitrary information at any
point in the file. They may be set at the command line using the -V/--variable option. If avariable is not set, pandoc will look for the key in the document’s metadata, which can be set
using either YAML metadata blocks or with the -M/--metadata option. In addition, somevariables are given default values by pandoc. See Variables below for a list of variables
used in pandoc’s default templates.
If you use custom templates, you may need to revise them as pandoc changes. We recommend tracking the changes in the default templates, and modifying your custom templates
accordingly. An easy way to do this is to fork the pandoc-templates repository and merge
in changes after each pandoc release.

Template syntax
Comments

Anything between the sequence $-- and the end of the line will be treated as a commentand omitted from the output.

37Templates
Delimiters

To mark variables and control structures in the template, either $…$ or ${…} may be usedas delimiters. The styles may also be mixed in the same template, but the opening andclosing delimiter must match in each case. The opening delimiter may be followed by one
or more spaces or tabs, which will be ignored. The closing delimiter may be preceded by
one or more spaces or tabs, which will be ignored.
To include a literal $ in the document, use $$.

Interpolated variables

A slot for an interpolated variable is a variable name surrounded by matched delimiters.
Variable names must begin with a letter and can contain letters, numbers, _, -, and .. The
keywords it, if, else, endif, for, sep, and endfor may not be used as variable names.
Examples:$foo$$foo.bar.baz$$foo_bar.baz-bim$$ foo $${foo}${foo.bar.baz}${foo_bar.baz-bim}${ foo }Variable names with periods are used to get at structured variable values. So, for example,
employee.salary will return the value of the salary field of the object that is the value ofthe employee field.
• If the value of the variable is a simple value, it will be rendered verbatim. (Note thatno escaping is done; the assumption is that the calling program will escape the strings
appropriately for the output format.)• If the value is a list, the values will be concatenated.
• If the value is a map, the string true will be rendered.
• Every other value will be rendered as the empty string.

Conditionals

A conditional begins with if(variable) (enclosed in matched delimiters) and ends withendif (enclosed in matched delimiters). It may optionally contain an else (enclosed inmatched delimiters). The if section is used if variable has a true value, otherwise the else
section is used (if present). The following values count as true:38Template syntax• any map
• any array containing at least one true value• any nonempty string• boolean True
Note that in YAML metadata (and metadata specified on the command line using -M/-metadata), unquoted true and false will be interpreted as Boolean values. But a variable
specified on the command line using -V/--variable will always be given a string value.
Hence a conditional if(foo) will be triggered if you use -V foo=false, but not if you use-M foo=false.
Examples:$if(foo)$bar$endif$$if(foo)$$foo$$endif$$if(foo)$part one$else$
part two$endif$${if(foo)}bar${endif}${if(foo)}${foo}${endif}${if(foo)}${ foo.bar }${else}no foo!
${endif}

The keyword elseif may be used to simplify complex nested conditionals:$if(foo)$XXX$elseif(bar)$
YYY$else$

39

Templates
ZZZ$endif$

For loops

A for loop begins with for(variable) (enclosed in matched delimiters) and ends withendfor (enclosed in matched delimiters).
• If variable is an array, the material inside the loop will be evaluated repeatedly, withvariable being set to each value of the array in turn, and concatenated.
• If variable is a map, the material inside will be set to the map.
• If the value of the associated variable is not an array or a map, a single iteration will
be performed on its value.
Examples:$for(foo)$$foo$$sep$, $endfor$$for(foo)$- $foo.last$, $foo.first$$endfor$${ for(foo.bar) }- ${ foo.bar.last }, ${ foo.bar.first }${ endfor }$for(mymap)$$it.name$: $it.office$$endfor$

You may optionally specify a separator between consecutive values using sep (enclosed inmatched delimiters). The material between sep and the endfor is the separator.

${ for(foo) }${ foo }${ sep }, ${ endfor }Instead of using variable inside the loop, the special anaphoric keyword it may be used.

${ for(foo.bar) }- ${ it.last }, ${ it.first }${ endfor }40Template syntax
Partials

Partials (subtemplates stored in different files) may be included by using the name of thepartial, followed by (), for example:${ styles() }Partials will be sought in the directory containing the main template. The file name will beassumed to have the same extension as the main template if it lacks an extension. Whencalling the partial, the full name including file extension can also be used:${ styles.html() }(If a partial is not found in the directory of the template and the template path is given
as a relative path, it will also be sought in the templates subdirectory of the user data
directory.)
Partials may optionally be applied to variables using a colon:${ date:fancy() }${ articles:bibentry() }If articles is an array, this will iterate over its values, applying the partial bibentry() toeach one. So the second example above is equivalent to${ for(articles) }${ it:bibentry() }${ endfor }Note that the anaphoric keyword it must be used when iterating over partials. In theabove examples, the bibentry partial should contain it.title (and so on) instead ofarticles.title.
Final newlines are omitted from included partials.
Partials may include other partials.
A separator between values of an array may be specified in square brackets, immediately
after the variable name or partial:${months[, ]}$${articles:bibentry()[; ]$The separator in this case is literal and (unlike with sep in an explicit for loop) cannot
contain interpolated variables or other template directives.

41Templates
Nesting

To ensure that content is “nested,” that is, subsequent lines indented, use the ^ directive:$item.number$$^$$item.description$ ($item.price$)

In this example, if item.description has multiple lines, they will all be indented to line up
with the first line:

00123

A fine bottle of 18-year old
Oban whiskey. ($148)

To nest multiple lines to the same level, align them with the ^ directive in the template. For
example:$item.number$$^$$item.description$ ($item.price$)(Available til $item.sellby$.)will produce

00123

A fine bottle of 18-year old
Oban whiskey. ($148)(Available til March 30, 2020.)

If a variable occurs by itself on a line, preceded by whitespace and not followed by further
text or directives on the same line, and the variable’s value contains multiple lines, it will benested automatically.

Breakable spaces

Normally, spaces in the template itself (as opposed to values of the interpolated variables)
are not breakable, but they can be made breakable in part of the template by using the ~keyword (ended with another ~).

$~$This long line may break if the document is renderedwith a short line length.$~$42

Template syntax
Pipes

A pipe transforms the value of a variable or partial. Pipes are specified using a slash (/)
between the variable name (or partial) and the pipe name. Example:$for(name)$$name/uppercase$$endfor$$for(metadata/pairs)$- $it.key$: $it.value$$endfor$$employee:name()/uppercase$

Pipes may be chained:$for(employees/pairs)$$it.key/alpha/uppercase$. $it.name$$endfor$Some pipes take parameters:|----------------------|------------|$for(employee)$$it.name.first/uppercase/left 20 "| "$$it.name.salary/right 10 " | " " |"$$endfor$|----------------------|------------|

Currently the following pipes are predefined:• pairs: Converts a map or array to an array of maps, each with key and value fields.
If the original value was an array, the key will be the array index, starting with 1.
• uppercase: Converts text to uppercase.
• lowercase: Converts text to lowercase.
• length: Returns the length of the value: number of characters for a textual value,
number of elements for a map or array.
• reverse: Reverses a textual value or array, and has no effect on other values.
• first: Returns the first value of an array, if applied to a non-empty array; otherwise
returns the original value.

43Templates• last: Returns the last value of an array, if applied to a non-empty array; otherwise
returns the original value.
• rest: Returns all but the first value of an array, if applied to a non-empty array;otherwise returns the original value.
• allbutlast: Returns all but the last value of an array, if applied to a non-empty array;otherwise returns the original value.
• chomp: Removes trailing newlines (and breakable space).
• nowrap: Disables line wrapping on breakable spaces.
• alpha: Converts textual values that can be read as an integer into lowercase alphabetic
characters a..z (mod 26). This can be used to get lettered enumeration from arrayindices. To get uppercase letters, chain with uppercase.
• roman: Converts textual values that can be read as an integer into lowercase romannumerals. This can be used to get lettered enumeration from array indices. To getuppercase roman, chain with uppercase.
• left n "leftborder" "rightborder": Renders a textual value in a block of width n,aligned to the left, with an optional left and right border. Has no effect on other values.
This can be used to align material in tables. Widths are positive integers indicating
the number of characters. Borders are strings inside double quotes; literal " and \characters must be backslash-escaped.
• right n "leftborder" "rightborder": Renders a textual value in a block of widthn, aligned to the right, and has no effect on other values.
• center n "leftborder" "rightborder": Renders a textual value in a block of widthn, aligned to the center, and has no effect on other values.

Variables
Metadata variables
title, author, date allow identification of basic aspects of the document. Included in PDF

metadata through LaTeX and ConTeXt. These can be set through a pandoc title block,which allows for multiple authors, or through a YAML metadata block:--author:- Aristotle- Peter Abelard...

44

Variables
Note that if you just want to set PDF or HTML metadata, without including a title
block in the document itself, you can set the title-meta, author-meta, and date-metavariables. (By default these are set automatically, based on title, author, and date.)
The page title in HTML is set by pagetitle, which is equal to title by default.
subtitle document subtitle, included in HTML, EPUB, LaTeX, ConTeXt, and docx docu-

ments
abstract document summary, included in HTML, LaTeX, ConTeXt, AsciiDoc, and docx

documents
abstract-title title of abstract, currently used only in HTML, EPUB, and docx. This will

be set automatically to a localized value, depending on lang, but can be manually
overridden.
keywords list of keywords to be included in HTML, PDF, ODT, pptx, docx and AsciiDoc

metadata; repeat as for author, above
subject document subject, included in ODT, PDF, docx, EPUB, and pptx metadata
description document description, included in ODT, docx and pptx metadata. Someapplications show this as Comments metadata.
category document category, included in docx and pptx metadata

Additionally, any root-level string metadata, not included in ODT, docx or pptx metadata
is added as a custom property. The following YAML metadata block for instance:--title:'This is the title'

subtitle: "This is the subtitle"
author:- Author One- Author Two
description: |This is a longdescription.
It consists of two paragraphs...

will include title, author and description as standard document properties and subtitle
as a custom property when converting to docx, ODT or pptx.

45

Templates
Language variableslang identifies the main language of the document using IETF language tags (following

the BCP 47 standard), such as en or en-GB. The Language subtag lookup tool can lookup or verify these tags. This affects most formats, and controls hyphenation in PDF
output when using LaTeX (through babel and polyglossia) or ConTeXt.
Use native pandoc Divs and Spans with the lang attribute to switch the language:--lang: en-GB...
Text in the main document language (British English).
::: {lang=fr-CA}> Cette citation est écrite en français canadien.
:::More text in English. ['Zitat auf Deutsch.']{lang=de}dir the base script direction, either rtl (right-to-left) or ltr (left-to-right).

For bidirectional documents, native pandoc spans and divs with the dir attribute(value rtl or ltr) can be used to override the base direction in some output formats. This may not always be necessary if the final renderer (e.g. the browser, whengenerating HTML) supports the Unicode Bidirectional Algorithm.
When using LaTeX for bidirectional documents, only the xelatex engine is fully
supported (use --pdf-engine=xelatex).

Variables for HTML
document-css Enables inclusion of most of the CSS in the styles.html partial (have alook with pandoc --print-default-data-file=templates/styles.html). Unless
you use --css, this variable is set to true by default. You can disable it with e.g. pandoc-M document-css=false.
mainfont sets the CSS font-family property on the html element.
fontsize sets the base CSS font-size, which you’d usually set to e.g. 20px, but it also
accepts pt (12pt = 16px in most browsers).
fontcolor sets the CSS color property on the html element.
linkcolor sets the CSS color property on all links.
monofont sets the CSS font-family property on code elements.
monobackgroundcolor sets the CSS background-color property on code elements and adds
extra padding.

46

Variables
linestretch sets the CSS line-height property on the html element, which is preferred

to be unitless.
maxwidth sets the CSS max-width property (default is 32em).
backgroundcolor sets the CSS background-color property on the html element.
margin-left, margin-right, margin-top, margin-bottom sets the corresponding CSS
padding properties on the body element.
To override or extend some CSS for just one document, include for example:--header-includes: |<style>blockquote {font-style: italic;}
tr.even {background-color: #f0f0f0;}
td, th {padding: 0.5em 2em 0.5em 0.5em;}
tbody {
border-bottom: none;}</style>---Variables for HTML mathclassoption when using --katex, you can render display math equations flush left using

YAML metadata or with -M classoption=fleqn.

Variables for HTML slides

These affect HTML output when producing slide shows with pandoc.
institute author affiliations: can be a list when there are multiple authors
revealjs-url base URL for reveal.js documents (defaults to https://unpkg.com/reveal.js@^4/)s5-url base URL for S5 documents (defaults to s5/default)
slidy-url base URL for Slidy documents (defaults to https://www.w3.org/Talks/Tools/Slidy2)
slideous-url base URL for Slideous documents (defaults to slideous)
title-slide-attributes additional attributes for the title slide of reveal.js slide shows.

See background in reveal.js, beamer, and pptx for an example.

47

Templates
All reveal.js configuration options are available as variables. To turn off boolean flags that
default to true in reveal.js, use 0.

Variables for Beamer slides

These variables change the appearance of PDF slides using beamer.
aspectratio slide aspect ratio (43 for 4:3 [default], 169 for 16:9, 1610 for 16:10, 149 for 14:9,
141 for 1.41:1, 54 for 5:4, 32 for 3:2)
beameroption add extra beamer option with \setbeameroption{}
institute author affiliations: can be a list when there are multiple authors
logo logo image for slides
navigation controls navigation symbols (default is empty for no navigation symbols; othervalid values are frame, vertical, and horizontal)
section-titles enables “title pages” for new sections (default is true)
theme, colortheme, fonttheme, innertheme, outertheme beamer themes
themeoptions options for LaTeX beamer themes (a list).
titlegraphic image for title slide
titlegraphicoptions options for title slide image

Variables for PowerPoint

These variables control the visual aspects of a slide show that are not easily controlled via
templates.
monofont font to use for code.

Variables for LaTeX

Pandoc uses these variables when creating a PDF with a LaTeX engine.

Layoutblock-headings make \paragraph and \subparagraph (fourth- and fifth-level headings, or

fifth- and sixth-level with book classes) free-standing rather than run-in; requires further formatting to distinguish from \subsubsection (third- or fourth-level headings).
Instead of using this option, KOMA-Script can adjust headings more extensively:--documentclass: scrartcl
header-includes: |\RedeclareSectionCommand[48

Variables
beforeskip=-10pt plus -2pt minus -1pt,
afterskip=1sp plus -1sp minus 1sp,
font=\normalfont\itshape]{paragraph}\RedeclareSectionCommand[
beforeskip=-10pt plus -2pt minus -1pt,
afterskip=1sp plus -1sp minus 1sp,
font=\normalfont\scshape,
indent=0pt]{subparagraph}...
classoption option for document class, e.g. oneside; repeat for multiple options:--classoption:- twocolumn- landscape...
documentclass document class: usually one of the standard classes, article, book, andreport; the KOMA-Script equivalents, scrartcl, scrbook, and scrreprt, which de-fault to smaller margins; or memoir
geometry option for geometry package, e.g. margin=1in; repeat for multiple options:--geometry:- top=30mm- left=20mm- heightrounded...
hyperrefoptions option for hyperref package, e.g. linktoc=all; repeat for multiple op-

tions:--hyperrefoptions:- linktoc=all- pdfwindowui- pdfpagemode=FullScreen...
indent if true, pandoc will use document class settings for indentation (the default LaTeX

template otherwise removes indentation and adds space between paragraphs)
linestretch adjusts line spacing using the setspace package, e.g. 1.25, 1.5
margin-left, margin-right, margin-top, margin-bottom sets margins if geometry is not

used (otherwise geometry overrides these)49Templates
pagestyle control \pagestyle{}: the default article class supports plain (default), empty(no running heads or page numbers), and headings (section titles in running heads)
papersize paper size, e.g. letter, a4
secnumdepth numbering depth for sections (with --number-sections option or
numbersections variable)
beamerarticle produce an article from Beamer slides
handout produce a handout version of Beamer slides (with overlays condensed into single

slides)Fonts
fontenc allows font encoding to be specified through fontenc package (with pdflatex);default is T1 (see LaTeX font encodings guide)
fontfamily font package for use with pdflatex: TeX Live includes many options, docu-

mented in the LaTeX Font Catalogue. The default is Latin Modern.
fontfamilyoptions options for package used as fontfamily; repeat for multiple options.

For example, to use the Libertine font with proportional lowercase (old-style) figures
through the libertinus package:--fontfamily: libertinus
fontfamilyoptions:
- osf
- p
...
fontsize font size for body text. The standard classes allow 10pt, 11pt, and 12pt. To use

another size, set documentclass to one of the KOMA-Script classes, such as scrartcl
or scrbook.
mainfont, sansfont, monofont, mathfont, CJKmainfont, CJKsansfont, CJKmonofont fontfamilies for use with xelatex or lualatex: take the name of any system font, using
the fontspec package. CJKmainfont uses the xecjk package if xelatex is used, or
the luatexja package if lualatex is used.

mainfontoptions, sansfontoptions, monofontoptions, mathfontoptions, CJKoptions, luatexjapreseto

options to use with mainfont, sansfont, monofont, mathfont, CJKmainfont in xelatex
and lualatex. Allow for any choices available through fontspec; repeat for multiple
options. For example, to use the TeX Gyre version of Palatino with lowercase figures:

50

Variables--mainfont: TeX Gyre Pagella
mainfontoptions:- Numbers=Lowercase- Numbers=Proportional...

mainfontfallback, sansfontfallback, monofontfallback fonts to try if a glyph isn’t

found in mainfont, sansfont, or monofont respectively. These are lists. The fontname must be followed by a colon and optionally a set of options, for example:--mainfontfallback:- "FreeSans:"- "NotoColorEmoji:mode=harf"...

Font fallbacks currently only work with lualatex.
babelfonts a map of Babel language names (e.g. chinese) to the font to be used with thelanguage:--babelfonts:
chinese-hant: "Noto Serif CJK TC"
russian: "Noto Serif"...

microtypeoptions options to pass to the microtype package

Linkscolorlinks add color to link text; automatically enabled if any of linkcolor, filecolor,
citecolor, urlcolor, or toccolor are set
boxlinks add visible box around links (has no effect if colorlinks is set)linkcolor, filecolor, citecolor, urlcolor, toccolor color for internal links, externallinks, citation links, linked URLs, and links in table of contents, respectively: uses
options allowed by xcolor, including the dvipsnames, svgnames, and x11names lists
links-as-notes causes links to be printed as footnotes
urlstyle style for URLs (e.g., tt, rm, sf, and, the default, same)51

Templates
Front matter
lof, lot include list of figures, list of tables
thanks contents of acknowledgments footnote after document title
toc include table of contents (can also be set using --toc/--table-of-contents)
toc-depth level of section to include in table of contents

BibLaTeX Bibliographies

These variables function when using BibLaTeX for citation rendering.
biblatexoptions list of options for biblatex
biblio-style bibliography style, when used with --natbib and --biblatex
biblio-title bibliography title, when used with --natbib and --biblatex
bibliography bibliography to use for resolving references
natbiboptions list of options for natbib

Variables for ConTeXt

Pandoc uses these variables when creating a PDF with ConTeXt.
fontsize font size for body text (e.g. 10pt, 12pt)
headertext, footertext text to be placed in running header or footer (see ConTeXt Headersand Footers); repeat up to four times for different placement
indenting controls indentation of paragraphs, e.g. yes,small,next (see ConTeXt Indentation); repeat for multiple options
interlinespace adjusts line spacing, e.g. 4ex (using setupinterlinespace); repeat for
multiple options
layout options for page margins and text arrangement (see ConTeXt Layout); repeat for
multiple options
linkcolor, contrastcolor color for links outside and inside a page, e.g. red, blue (see
ConTeXt Color)
linkstyle typeface style for links, e.g. normal, bold, slanted, boldslanted, type, cap,smalllof, lot include list of figures, list of tables
mainfont, sansfont, monofont, mathfont font families: take the name of any system font(see ConTeXt Font Switching)
mainfontfallback, sansfontfallback, monofontfallback list of fonts to try, in order, if

a glyph is not found in the main font. Use \definefallbackfamily-compatible fontname syntax. Emoji fonts are unsupported.
margin-left, margin-right, margin-top, margin-bottom sets margins, if layout is not
used (otherwise layout overrides these)52

Variables
pagenumbering page number style and location (using setuppagenumbering); repeat for

multiple options
papersize paper size, e.g. letter, A4, landscape (see ConTeXt Paper Setup); repeat for
multiple options
pdfa adds to the preamble the setup necessary to generate PDF/A of the type specified,e.g. 1a:2005, 2a. If no type is specified (i.e. the value is set to True, by e.g. -metadata=pdfa or pdfa: true in a YAML metadata block), 1b:2005 will be usedas default, for reasons of backwards compatibility. Using --variable=pdfa without
specified value is not supported. To successfully generate PDF/A the required ICC
color profiles have to be available and the content and all included files (such asimages) have to be standard-conforming. The ICC profiles and output intent may
be specified using the variables pdfaiccprofile and pdfaintent. See also ConTeXt
PDFA for more details.
pdfaiccprofile when used in conjunction with pdfa, specifies the ICC profile to use in
the PDF, e.g. default.cmyk. If left unspecified, sRGB.icc is used as default. May berepeated to include multiple profiles. Note that the profiles have to be available on
the system. They can be obtained from ConTeXt ICC Profiles.
pdfaintent when used in conjunction with pdfa, specifies the output intent for the colors, e.g. ISO coated v2 300\letterpercent\space (ECI) If left unspecified, sRGB
IEC61966-2.1 is used as default.
toc include table of contents (can also be set using --toc/--table-of-contents)
urlstyle typeface style for links without link text, e.g. normal, bold, slanted, boldslanted,
type, cap, small
whitespace spacing between paragraphs, e.g. none, small (using setupwhitespace)includesource include all source documents as file attachments in the PDF file

Variables for wkhtmltopdf

Pandoc uses these variables when creating a PDF with wkhtmltopdf. The --css option also
affects the output.
footer-html, header-html add information to the header and footer
margin-left, margin-right, margin-top, margin-bottom set the page margins
papersize sets the PDF paper size

Variables for man pages
adjusting adjusts text to left (l), right (r), center (c), or both (b) margins
footer footer in man pages
header header in man pages
section section number in man pages

53

Templates
Variables for Texinfo
version version of software (used in title and title page)
filename name of info file to be generated (defaults to a name based on the texi filename)

Variables for Typst
margin A dictionary with the fields defined in the Typst documentation: x, y, top, bottom,
left, right.
papersize Paper size: a4, us-letter, etc.
mainfont Name of system font to use for the main font.
fontsize Font size (e.g., 12pt).
section-numbering Schema to use for numbering sections, e.g. 1.A.1.
columns Number of columns for body text.

Variables for ms
fontfamily A (Avant Garde), B (Bookman), C (Helvetica), HN (Helvetica Narrow), P(Palatino), or T (Times New Roman). This setting does not affect source code, whichis always displayed using monospace Courier. These built-in fonts are limited intheir coverage of characters. Additional fonts may be installed using the script
install-font.sh provided by Peter Schaffter and documented in detail on his web
site.
indent paragraph indent (e.g. 2m)
lineheight line height (e.g. 12p)
pointsize point size (e.g. 10p)

Variables set automatically

Pandoc sets these variables automatically in response to options or document contents;
users can also modify them. These vary depending on the output format, and include thefollowing:
body body of document
date-meta the date variable converted to ISO 8601 YYYY-MM-DD, included in all HTML

based formats (dzslides, epub, html, html4, html5, revealjs, s5, slideous, slidy). The
recognized formats for date are: mm/dd/yyyy, mm/dd/yy, yyyy-mm-dd (ISO 8601), dd MM
yyyy (e.g. either 02 Apr 2018 or 02 April 2018), MM dd, yyyy (e.g. Apr. 02, 2018
or April 02, 2018),yyyy[mm[dd]](e.g.20180402, 201804 or 2018).
header-includes contents specified by -H/--include-in-header (may have multiple val-

ues)

54

Variables
include-before contents specified by -B/--include-before-body (may have multiple

values)include-after contents specified by -A/--include-after-body (may have multiple val-ues)
meta-json JSON representation of all of the document’s metadata. Field values are trans-

formed to the selected output format.
numbersections non-null value if -N/--number-sections was specified
sourcefile, outputfile source and destination filenames, as given on the command line.
sourcefile can also be a list if input comes from multiple files, or empty if input isfrom stdin. You can use the following snippet in your template to distinguish them:$if(sourcefile)$$for(sourcefile)$$sourcefile$$endfor$$else$(stdin)$endif$Similarly, outputfile can be - if output goes to the terminal.
If you need absolute paths, use e.g. $curdir$/$sourcefile$.
curdir working directory from which pandoc is run.
pandoc-version pandoc version.
toc non-null value if --toc/--table-of-contents was specified
toc-title title of table of contents (works only with EPUB, HTML, revealjs, opendocument,

odt, docx, pptx, beamer, LaTeX). Note that in docx and pptx a custom toc-title will
be picked up from metadata, but cannot be set as a variable.

55

Extensions
The behavior of some of the readers and writers can be adjusted by enabling or disabling
various extensions.
An extension can be enabled by adding +EXTENSION to the format name and disabled byadding -EXTENSION. For example, --from markdown_strict+footnotes is strict Markdownwith footnotes enabled, while --from markdown-footnotes-pipe_tables is pandoc’s Markdown without footnotes or pipe tables.
The Markdown reader and writer make by far the most use of extensions. Extensions
only used by them are therefore covered in the section Pandoc’s Markdown below (seeMarkdown variants for commonmark and gfm). In the following, extensions that also workfor other formats are covered.
Note that Markdown extensions added to the ipynb format affect Markdown cells in Jupyter
notebooks (as do command-line options like --markdown-headings).

Typography
Extension: smart

Interpret straight quotes as curly quotes, --- as em-dashes, -- as en-dashes, and ... asellipses. Nonbreaking spaces are inserted after certain abbreviations, such as “Mr.”This extension can be enabled/disabled for the following formats:
input formats markdown, commonmark, latex, mediawiki, org, rst, twiki, html
output formats markdown, latex, context, rst
enabled by default in markdown, latex, context (both input and output)

Note: If you are writing Markdown, then the smart extension has the reverse effect: what
would have been curly quotes comes out straight.
In LaTeX, smart means to use the standard TeX ligatures for quotation marks (`` and '' fordouble quotes, ` and ' for single quotes) and dashes (-- for en-dash and --- for em-dash).
If smart is disabled, then in reading LaTeX pandoc will parse these characters literally. In
writing LaTeX, enabling smart tells pandoc to use the ligatures when possible; if smart isdisabled pandoc will use unicode quotation mark and dash characters.

57

Extensions

Headings and sections
Extension: auto_identifiers

A heading without an explicitly specified identifier will be automatically assigned a unique
identifier based on the heading text.
This extension can be enabled/disabled for the following formats:
input formats markdown, latex, rst, mediawiki, textile
output formats markdown, museenabled by default in markdown, muse

The default algorithm used to derive the identifier from the heading text is:• Remove all formatting, links, etc.
• Remove all footnotes.
• Remove all non-alphanumeric characters, except underscores, hyphens, and periods.
• Replace all spaces and newlines with hyphens.
• Convert all alphabetic characters to lowercase.
• Remove everything up to the first letter (identifiers may not begin with a number orpunctuation mark).
• If nothing is left after this, use the identifier section.
Thus, for example,
Heading

Identifier

Heading identifiers in HTMLheading-identifiers-in-html

Maître d'hôtelmaître-dhôtel*Dogs*?--in *my* house?

dogs--in-my-house[HTML], [S5], or [RTF]?

html-s5-or-rtf

3. Applications

applications

33

section

These rules should, in most cases, allow one to determine the identifier from the heading
text. The exception is when several headings have the same text; in this case, the first will get
an identifier as described above; the second will get the same identifier with -1 appended;
the third with -2; and so on.
(However, a different algorithm is used if gfm_auto_identifiers is enabled; see below.)
These identifiers are used to provide link targets in the table of contents generated by the--toc|--table-of-contents option. They also make it easy to provide links from one
section of a document to another. A link to this section, for example, might look like this:58

Math Input
See the section on[heading identifiers](#heading-identifiers-in-html-latex-and-context).

Note, however, that this method of providing links to sections works only in HTML, LaTeX,
and ConTeXt formats.
If the --section-divs option is specified, then each section will be wrapped in a section (ora div, if html4 was specified), and the identifier will be attached to the enclosing <section>(or <div>) tag rather than the heading itself. This allows entire sections to be manipulatedusing JavaScript or treated differently in CSS.

Extension: ascii_identifiers

Causes the identifiers produced by auto_identifiers to be pure ASCII. Accents are
stripped off of accented Latin letters, and non-Latin letters are omitted.

Extension: gfm_auto_identifiers

Changes the algorithm used by auto_identifiers to conform to GitHub’s method. Spaces
are converted to dashes (-), uppercase characters to lowercase characters, and punctuation
characters other than - and _ are removed. Emojis are replaced by their names.

Math Input
The extensions tex_math_dollars, tex_math_gfm, tex_math_single_backslash, and
tex_math_double_backslash are described in the section about Pandoc’s Markdown.
However, they can also be used with HTML input. This is handy for reading web pages
formatted using MathJax, for example.

Raw HTML/TeX
The following extensions are described in more detail in their respective sections of Pandoc’s
Markdown:• raw_html allows HTML elements which are not representable in pandoc’s AST to beparsed as raw HTML. By default, this is disabled for HTML input.
• raw_tex allows raw LaTeX, TeX, and ConTeXt to be included in a document. Thisextension can be enabled/disabled for the following formats (in addition to markdown):
input formats latex, textile, html (environments, \ref, and \eqref only), ipynb

59Extensions
output formats textile, commonmark

Note: as applied to ipynb, raw_html and raw_tex affect not only raw TeX in Markdown
cells, but data with mime type text/html in output cells. Since the ipynb reader
attempts to preserve the richest possible outputs when several options are given, youwill get best results if you disable raw_html and raw_tex when converting to formats
like docx which don’t allow raw html or tex.
• native_divs causes HTML div elements to be parsed as native pandoc Div blocks. If
you want them to be parsed as raw HTML, use -f html-native_divs+raw_html.
• native_spans causes HTML span elements to be parsed as native pandoc Span inlines.
If you want them to be parsed as raw HTML, use -f html-native_spans+raw_html.
If you want to drop all divs and spans when converting HTML to Markdown, you
can use pandoc -f html-native_divs-native_spans -t markdown.

Literate Haskell support
Extension: literate_haskell

Treat the document as literate Haskell source.
This extension can be enabled/disabled for the following formats:
input formats markdown, rst, latex
output formats markdown, rst, latex, html

If you append +lhs (or +literate_haskell) to one of the formats above, pandoc will treat
the document as literate Haskell source. This means that
• In Markdown input, “bird track” sections will be parsed as Haskell code rather thanblock quotations. Text between \begin{code} and \end{code} will also be treated as
Haskell code. For ATX-style headings the character ‘=’ will be used instead of ‘#’.
• In Markdown output, code blocks with classes haskell and literate will be renderedusing bird tracks, and block quotations will be indented one space, so they will not
be treated as Haskell code. In addition, headings will be rendered setext-style (withunderlines) rather than ATX-style (with ‘#’ characters). (This is because ghc treats ‘#’
characters in column 1 as introducing line numbers.)• In restructured text input, “bird track” sections will be parsed as Haskell code.
• In restructured text output, code blocks with class haskell will be rendered using
bird tracks.
• In LaTeX input, text in code environments will be parsed as Haskell code.

60

Other extensions• In LaTeX output, code blocks with class haskell will be rendered inside code environments.
• In HTML output, code blocks with class haskell will be rendered with classliteratehaskell and bird tracks.
Examples:pandoc -f markdown+lhs -t html

reads literate Haskell source formatted with Markdown conventions and writes ordinaryHTML (without bird tracks).

pandoc -f markdown+lhs -t html+lhs

writes HTML with the Haskell code in bird tracks, so it can be copied and pasted as literate
Haskell source.
Note that GHC expects the bird tracks in the first column, so indented literate code blocks(e.g. inside an itemized environment) will not be picked up by the Haskell compiler.

Other extensions
Extension: empty_paragraphs

Allows empty paragraphs. By default empty paragraphs are omitted.
This extension can be enabled/disabled for the following formats:
input formats docx, html
output formats docx, odt, opendocument, html, latex

Extension: native_numbering

Enables native numbering of figures and tables. Enumeration starts at 1.
This extension can be enabled/disabled for the following formats:output formats odt, opendocument, docx

61Extensions
Extension: xrefs_name

Links to headings, figures and tables inside the document are substituted with crossreferences that will use the name or caption of the referenced item. The original linktext is replaced once the generated document is refreshed. This extension can be combinedwith xrefs_number in which case numbers will appear before the name.
Text in cross-references is only made consistent with the referenced item once the document
has been refreshed.
This extension can be enabled/disabled for the following formats:output formats odt, opendocument

Extension: xrefs_number

Links to headings, figures and tables inside the document are substituted with crossreferences that will use the number of the referenced item. The original link text is discarded.
This extension can be combined with xrefs_name in which case the name or caption numbers
will appear after the number.
For the xrefs_number to be useful heading numbers must be enabled in the generated document, also table and figure captions must be enabled using for example thenative_numbering extension.
Numbers in cross-references are only visible in the final document once it has been refreshed.
This extension can be enabled/disabled for the following formats:output formats odt, opendocument

Extension: styles

When converting from docx, read all docx styles as divs (for paragraph styles) and spans(for character styles) regardless of whether pandoc understands the meaning of these styles.
This can be used with docx custom styles. Disabled by default.
input formats docx

Extension: amuse

In the muse input format, this enables Text::Amuse extensions to Emacs Muse markup.

62

Other extensions
Extension: raw_markdown

In the ipynb input format, this causes Markdown cells to be included as raw Markdown
blocks (allowing lossless round-tripping) rather than being parsed. Use this only when you
are targeting ipynb or a Markdown-based output format.

Extension: citations (typst)

When the citations extension is enabled in typst (as it is by default), typst citations will
be parsed as native pandoc citations, and native pandoc citations will be rendered as typst
citations.

Extension: citations (org)

When the citations extension is enabled in org, org-cite and org-ref style citations will
be parsed as native pandoc citations, and org-cite citations will be used to render native
pandoc citations.

Extension: citations (docx)

When citations is enabled in docx, citations inserted by Zotero or Mendeley or EndNote
plugins will be parsed as native pandoc citations. (Otherwise, the formatted citations
generated by the bibliographic software will be parsed as regular text.)

Extension: fancy_lists (org)Some aspects of Pandoc’s Markdown fancy lists are also accepted in org input, mimicking theoption org-list-allow-alphabetical in Emacs. As in Org Mode, enabling this extension
allows lowercase and uppercase alphabetical markers for ordered lists to be parsed inaddition to arabic ones. Note that for Org, this does not include roman numerals or the #placeholder that are enabled by the extension in Pandoc’s Markdown.

Extension: element_citations

In the jats output formats, this causes reference items to be replaced with <elementcitation> elements. These elements are not influenced by CSL styles, but all informationon the item is included in tags.

63

Extensions
Extension: ntb

In the context output format this enables the use of Natural Tables (TABLE) instead of thedefault Extreme Tables (xtables). Natural tables allow more fine-grained global customization but come at a performance penalty compared to extreme tables.

Extension: tagging

Enabling this extension with context output will produce markup suitable for the production of tagged PDFs. This includes additional markers for paragraphs and alternative
markup for emphasized text. The emphasis-command template variable is set if the extension
is enabled.

64

Pandoc’s Markdown
Pandoc understands an extended and slightly revised version of John Gruber’s Markdown
syntax. This document explains the syntax, noting differences from original Markdown.
Except where noted, these differences can be suppressed by using the markdown_strict
format instead of markdown. Extensions can be enabled or disabled to specify the behavior
more granularly. They are described in the following. See also Extensions above, forextensions that work also on other formats.

Philosophy
Markdown is designed to be easy to write, and, even more importantly, easy to read:
A Markdown-formatted document should be publishable as-is, as plain text,
without looking like it’s been marked up with tags or formatting instructions.
– John Gruber
This principle has guided pandoc’s decisions in finding syntax for tables, footnotes, andother extensions.
There is, however, one respect in which pandoc’s aims are different from the original aims of
Markdown. Whereas Markdown was originally designed with HTML generation in mind,
pandoc is designed for multiple output formats. Thus, while pandoc allows the embeddingof raw HTML, it discourages it, and provides other, non-HTMLish ways of representing
important document elements like definition lists, tables, mathematics, and footnotes.

Paragraphs
A paragraph is one or more lines of text followed by one or more blank lines. Newlines aretreated as spaces, so you can reflow your paragraphs as you like. If you need a hard line
break, put two or more spaces at the end of a line.

65Pandoc’s Markdown
Extension: escaped_line_breaks

A backslash followed by a newline is also a hard line break. Note: in multiline and gridtable cells, this is the only way to create a hard line break, since trailing spaces in the cells
are ignored.

Headings
There are two kinds of headings: Setext and ATX.

Setext-style headings

A setext-style heading is a line of text “underlined” with a row of = signs (for a level-one
heading) or - signs (for a level-two heading):

A level-one heading===================A level-two heading-------------------The heading text can contain inline formatting, such as emphasis (see Inline formatting,below).

ATX-style headings

An ATX-style heading consists of one to six # signs and a line of text, optionally followedby any number of # signs. The number of # signs at the beginning of the line is the headinglevel:## A level-two heading### A level-three heading ###As with setext-style headings, the heading text can contain formatting:# A level-one heading with a [link](/url) and *emphasis*

66

Headings
Extension: blank_before_header

Original Markdown syntax does not require a blank line before a heading. Pandoc does
require this (except, of course, at the beginning of the document). The reason for therequirement is that it is all too easy for a # to end up at the beginning of a line by accident(perhaps through line wrapping). Consider, for example:
I like several of their flavors of ice cream:#22, for example, and #5.

Extension: space_in_atx_header

Many Markdown implementations do not require a space between the opening #s of an
ATX heading and the heading text, so that #5 bolt and #hashtag count as headings. With
this extension, pandoc does require the space.

Heading identifiers

See also the auto_identifiers extension above.

Extension: header_attributes

Headings can be assigned attributes using this syntax at the end of the line containing theheading text:{#identifier .class .class key=value key=value}Thus, for example, the following headings will all be assigned the identifier foo:
# My heading {#foo}## My heading ##{#foo}

My other heading{#foo}---------------(This syntax is compatible with PHP Markdown Extra.)Note that although this syntax allows assignment of classes and key/value attributes, writers
generally don’t use all of this information. Identifiers, classes, and key/value attributes are67Pandoc’s Markdown
used in HTML and HTML-based formats such as EPUB and slidy. Identifiers are used forlabels and link anchors in the LaTeX, ConTeXt, Textile, Jira markup, and AsciiDoc writers.
Headings with the class unnumbered will not be numbered, even if --number-sections is
specified. A single hyphen (-) in an attribute context is equivalent to .unnumbered, andpreferable in non-English documents. So,# My heading {-}is just the same as# My heading {.unnumbered}If the unlisted class is present in addition to unnumbered, the heading will not be included
in a table of contents. (Currently this feature is only implemented for certain formats: those
based on LaTeX and HTML, PowerPoint, and RTF.)

Extension: implicit_header_references

Pandoc behaves as if reference links have been defined for each heading. So, to link to aheading# Heading identifiers in HTMLyou can simply write[Heading identifiers in HTML]or[Heading identifiers in HTML][]or[the section on heading identifiers][heading identifiers inHTML]instead of giving the identifier explicitly:[Heading identifiers in HTML](#heading-identifiers-in-html)

68Block quotations
If there are multiple headings with identical text, the corresponding reference will link tothe first one only, and you will need to use explicit links to link to the others, as describedabove.
Like regular reference links, these references are case-insensitive.
Explicit link reference definitions always take priority over implicit heading references. So,
in the following example, the link will point to bar, not to #foo:# Foo[foo]: bar
See [foo]

Block quotations
Markdown uses email conventions for quoting blocks of text. A block quotation is one ormore paragraphs or other block elements (such as lists or headings), with each line precededby a > character and an optional space. (The > need not start at the left margin, but it should
not be indented more than three spaces.)> This is a block quote. This> paragraph has two lines.
>> 1. This is a list inside a block quote.
> 2. Second item.

A “lazy” form, which requires the > character only on the first line of each block, is also
allowed:> This is a block quote. This
paragraph has two lines.
> 1. This is a list inside a block quote.
2. Second item.

Among the block elements that can be contained in a block quote are other block quotes.
That is, block quotes can be nested:> This is a block quote.
>> > A block quote within a block quote.

69

Pandoc’s Markdown
If the > character is followed by an optional space, that space will be considered part of theblock quote marker and not part of the indentation of the contents. Thus, to put an indented
code block in a block quote, you need five spaces after the >:

>

code

Extension: blank_before_blockquote

Original Markdown syntax does not require a blank line before a block quote. Pandoc
does require this (except, of course, at the beginning of the document). The reason for
the requirement is that it is all too easy for a > to end up at the beginning of a line byaccident (perhaps through line wrapping). So, unless the markdown_strict format is used,
the following does not produce a nested block quote in pandoc:> This is a block quote.
>> Not nested, since `blank_before_blockquote` is enabled by default

Verbatim (code) blocks

Indented code blocks

A block of text indented four spaces (or one tab) is treated as verbatim text: that is, special
characters do not trigger special formatting, and all spaces and line breaks are preserved.
For example,

if (a > 3) {moveShip(5 * gravity, DOWN);}

The initial (four space or one tab) indentation is not considered part of the verbatim text,
and is removed in the output.
Note: blank lines in the verbatim text need not begin with four spaces.

70Verbatim (code) blocks
Fenced code blocks
Extension: fenced_code_blocks

In addition to standard indented code blocks, pandoc supports fenced code blocks. These
begin with a row of three or more tildes (~) and end with a row of tildes that must be atleast as long as the starting row. Everything between these lines is treated as code. No
indentation is necessary:~~~~~~~
if (a > 3) {moveShip(5 * gravity, DOWN);}~~~~~~~

Like regular code blocks, fenced code blocks must be separated from surrounding text byblank lines.
If the code itself contains a row of tildes or backticks, just use a longer row of tildes orbackticks at the start and end:~~~~~~~~~~~~~~~~~~~~~~~~~~
code including tildes~~~~~~~~~~~~~~~~~~~~~~~~~~

Extension: backtick_code_blocks

Same as fenced_code_blocks, but uses backticks (`) instead of tildes (~).

Extension: fenced_code_attributes

Optionally, you may attach attributes to fenced or backtick code block using this syntax:~~~~ {#mycode .haskell .numberLines startFrom="100"}
qsort []

= []qsort (x:xs) = qsort (filter (< x) xs) ++ [x] ++qsort (filter (>= x) xs)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

71

Pandoc’s Markdown
Here mycode is an identifier, haskell and numberLines are classes, and startFrom is an
attribute with value 100. Some output formats can use this information to do syntax
highlighting. Currently, the only output formats that use this information are HTML,LaTeX, Docx, Ms, and PowerPoint. If highlighting is supported for your output format andlanguage, then the code block above will appear highlighted, with numbered lines. (To see
which languages are supported, type pandoc --list-highlight-languages.) Otherwise,
the code block above will appear as follows:<pre id="mycode" class="haskell numberLines" startFrom="100"><code>...
</code></pre>The numberLines (or number-lines) class will cause the lines of the code block to be numbered, starting with 1 or the value of the startFrom attribute. The lineAnchors (or lineanchors) class will cause the lines to be clickable anchors in HTML output.
A shortcut form can also be used for specifying the language of the code block:```haskell
qsort [] = []```This is equivalent to:``` {.haskell}qsort [] = []```This shortcut form may be combined with attributes:```haskell {.numberLines}
qsort [] = []```Which is equivalent to:``` {.haskell .numberLines}
qsort [] = []```72

Line blocks
If the fenced_code_attributes extension is disabled, but input contains class attribute(s)for the code block, the first class attribute will be printed after the opening fence as a bareword.
To prevent all highlighting, use the --no-highlight flag. To set the highlighting style,use --highlight-style. For more information on highlighting, see Syntax highlighting,below.

Line blocks
Extension: line_blocks

A line block is a sequence of lines beginning with a vertical bar (|) followed by a space. The
division into lines will be preserved in the output, as will any leading spaces; otherwise, thelines will be formatted as Markdown. This is useful for verse and addresses:| The limerick packs laughs anatomical| In space that is quite economical.
|

But the good ones I've seen|

So seldom are clean| And the clean ones so seldom are comical| 200 Main St.
| Berkeley, CA 94718

The lines can be hard-wrapped if needed, but the continuation line must begin with aspace.

| The Right Honorable Most Venerable and Righteous Samuel L.
Constable, Jr.
| 200 Main St.
| Berkeley, CA 94718

Inline formatting (such as emphasis) is allowed in the content (though it can’t cross line
boundaries). Block-level formatting (such as block quotes or lists) is not recognized.
This syntax is borrowed from reStructuredText.

73

Pandoc’s Markdown

Lists

Bullet lists

A bullet list is a list of bulleted list items. A bulleted list item begins with a bullet (*, +, or -).
Here is a simple example:

* one
* two
* threeThis will produce a “compact” list. If you want a “loose” list, in which each item is formatted
as a paragraph, put spaces between the items:

* one
* two
* three

The bullets need not be flush with the left margin; they may be indented one, two, or threespaces. The bullet must be followed by whitespace.
List items look best if subsequent lines are flush with the first line (after the bullet):* here is my firstlist item.
* and my second.

But Markdown also allows a “lazy” format:* here is my firstlist item.
* and my second.

74

ListsBlock content in list items

A list item may contain multiple paragraphs and other block-level content. However,subsequent paragraphs must be preceded by a blank line and indented to line up with thefirst non-space content after the list marker.

* First paragraph.
Continued.
* Second paragraph. With a code block, which must be indented
eight spaces:{ code }Exception: if the list marker is followed by an indented code block, which must begin 5
spaces after the list marker, then subsequent paragraphs must begin two columns after thelast character of the list marker:*

code
continuation paragraph

List items may include other lists. In this case the preceding blank line is optional. The
nested list must be indented to line up with the first non-space character after the list markerof the containing list item.

* fruits+ apples- macintosh- red delicious+ pears+ peaches* vegetables+ broccoli+ chard

As noted above, Markdown allows you to write list items “lazily,” instead of indenting
continuation lines. However, if there are multiple paragraphs or other blocks in a list item,the first line of each must be indented.

75Pandoc’s Markdown+ A lazy, lazy, list
item.
+ Another one; this looks
bad but is legal.
Second paragraph of second
list item.

Ordered lists

Ordered lists work just like bulleted lists, except that the items begin with enumerators
rather than bullets.
In original Markdown, enumerators are decimal numbers followed by a period and a space.
The numbers themselves are ignored, so there is no difference between this list:
1.

one

2.

two

3.

three

and this one:
5.

one

7.

two

1.

three

Extension: fancy_lists

Unlike original Markdown, pandoc allows ordered list items to be marked with uppercase
and lowercase letters and roman numerals, in addition to Arabic numerals. List markers
may be enclosed in parentheses or followed by a single right-parenthesis or period. They
must be separated from the text that follows by at least one space, and, if the list marker is acapital letter with a period, by at least two spaces.1
1

The point of this rule is to ensure that normal paragraphs starting with people’s initials, like

B. Russell won a Nobel Prize (but not for "On Denoting").

do not get treated as list items.
This rule will not prevent(C) 2007 Joe Smith

from being interpreted as a list item. In this case, a backslash escape can be used:(C\) 2007 Joe Smith76

Lists
The fancy_lists extension also allows ‘#’ to be used as an ordered list marker in place of anumeral:#. one#. twoNote: the ‘#’ ordered list marker doesn’t work with commonmark.

Extension: startnum

Pandoc also pays attention to the type of list marker used, and to the starting number, andboth of these are preserved where possible in the output format. Thus, the following yields
a list with numbers followed by a single parenthesis, starting with 9, and a sublist withlowercase roman numerals:

9)

Ninth

10)

Tenth

11)

Eleventhi. suboneii. subtwo
iii. subthree

Pandoc will start a new list each time a different type of list marker is used. So, the following
will create three lists:(2) Two(5) Three
1.

Four

*

Five

If default list markers are desired, use #.:

#.

one

#.

two

#.

three

77

Pandoc’s Markdown
Extension: task_lists

Pandoc supports task lists, using the syntax of GitHub-Flavored Markdown.
- [ ] an unchecked task list item
- [x] checked item

Definition lists
Extension: definition_lists

Pandoc supports definition lists, using the syntax of PHP Markdown Extra with someextensions.2
Term 1:

Definition 1

Term 2 with *inline markup*:

Definition 2{ some code, part of Definition 2 }Third paragraph of definition 2.

Each term must fit on one line, which may optionally be followed by a blank line, and mustbe followed by one or more definitions. A definition begins with a colon or tilde, which
may be indented one or two spaces.
A term may have multiple definitions, and each definition may consist of one or more blockelements (paragraph, code block, list, etc.), each indented four spaces or one tab stop. The
body of the definition (not including the first line) should be indented four spaces. However,as with other Markdown lists, you can “lazily” omit indentation except at the beginning ofa paragraph or other block element:
Term 1:

Definition

with lazy continuation.
Second paragraph of the definition.
2

I have been influenced by the suggestions of David Wheeler.

78

ListsIf you leave space before the definition (as in the example above), the text of the definition
will be treated as a paragraph. In some output formats, this will mean greater spacing
between term/definition pairs. For a more compact definition list, omit the space before
the definition:
Term 1~ Definition 1
Term 2~ Definition 2a~ Definition 2b

Note that space between items in a definition list is required. (A variant that loosens
this requirement, but disallows “lazy” hard wrapping, can be activated with thecompact_definition_lists extension.)

Numbered example lists
Extension: example_lists

The special list marker @ can be used for sequentially numbered examples. The first list itemwith a @ marker will be numbered ‘1’, the next ‘2’, and so on, throughout the document.
The numbered examples need not occur in a single list; each new list using @ will take up
where the last stopped. So, for example:(@)

My first example will be numbered (1).

(@)

My second example will be numbered (2).

Explanation of examples.
(@)

My third example will be numbered (3).

Numbered examples can be labeled and referred to elsewhere in the document:(@good)This is a good example.

As (@good) illustrates, ...

The label can be any string of alphanumeric characters, underscores, or hyphens.
Continuation paragraphs in example lists must always be indented four spaces, regardless of
the length of the list marker. That is, example lists always behave as if the four_space_rule79Pandoc’s Markdown
extension is set. This is because example labels tend to be long, and indenting content to
the first non-space character after the label would be awkward.
You can repeat an earlier numbered example by re-using its label:(@foo) Sample sentence.
Intervening text...
This theory can explain the case we saw earlier (repeated):(@foo) Sample sentence.

This only works reliably, though, if the repeated item is in a list by itself, because eachnumbered example list will be numbered continuously from its starting number.

Ending a list

What if you want to put an indented code block after a list?

-

item one-item two{ my code block }Trouble! Here pandoc (like other Markdown implementations) will treat { my code block} as the second paragraph of item two, and not as a code block.
To “cut off” the list after item two, you can insert some non-indented content, like an HTML
comment, which won’t produce visible output in any format:-

item one-item two<!-- end of list -->{ my code block }You can use the same trick if you want two consecutive lists instead of one big list:80Horizontal rules
1.

one

2.

two

3.

three

<!-- -->
1.

uno

2.

dos

3.

tres

Horizontal rules
A line containing a row of three or more *, -, or _ characters (optionally separated by spaces)
produces a horizontal rule:

*

*

*

*

---------------

We strongly recommend that horizontal rules be separated from surrounding text by blanklines. If a horizontal rule is not followed by a blank line, pandoc may try to interpret thelines that follow as a YAML metadata block or a table.

TablesFour kinds of tables may be used. The first three kinds presuppose the use of a fixed-widthfont, such as Courier. The fourth kind can be used with proportionally spaced fonts, as it
does not require lining up columns.

Extension: table_captions

A caption may optionally be provided with all 4 kinds of tables (as illustrated in the examples
below). A caption is a paragraph beginning with the string Table: (or table: or just :),which will be stripped off. It may appear either before or after the table.

81

Pandoc’s Markdown
Extension: simple_tables

Simple tables look like this:Right------12

Left

Center------ ----------

Default-------

12

12

12

123

123

123

123

1

1

1

1

Table:

Demonstration of simple table syntax.

The header and table rows must each fit on one line. Column alignments are determined by
the position of the header text relative to the dashed line below it:3
• If the dashed line is flush with the header text on the right side but extends beyond iton the left, the column is right-aligned.
• If the dashed line is flush with the header text on the left side but extends beyond iton the right, the column is left-aligned.
• If the dashed line extends beyond the header text on both sides, the column is centered.
• If the dashed line is flush with the header text on both sides, the default alignment isused (in most cases, this will be left).
The table must end with a blank line, or a line of dashes followed by a blank line.
The column header row may be omitted, provided a dashed line is used to end the table.
For example:------------- -----------------

12

12

12

12

123

123

123

123

1

1

1

1

------------- -----------------

When the header row is omitted, column alignments are determined on the basis of the firstline of the table body. So, in the tables above, the columns would be right, left, center, andright aligned, respectively.
3This scheme is due to Michel Fortin, who proposed it on the Markdown discussion list.

82

Tables
Extension: multiline_tablesMultiline tables allow header and table rows to span multiple lines of text (but cells thatspan multiple columns or rows of the table are not supported). Here is an example:------------------------------------------------------------Centered

Default

Right Left

HeaderAlignedAligned Aligned----------- ------- --------------- ------------------------Firstrow

12.0 Example of a row thatspans multiple lines.

Secondrow

5.0 Here's another one. Notethe blank line between
rows.

------------------------------------------------------------Table: Here's the caption. It, too, may span
multiple lines.

These work like simple tables, but with the following differences:• They must begin with a row of dashes, before the header text (unless the header row
is omitted).
• They must end with a row of dashes, then a blank line.
• The rows must be separated by blank lines.
In multiline tables, the table parser pays attention to the widths of the columns, and thewriters try to reproduce these relative widths in the output. So, if you find that one of thecolumns is too narrow in the output, try widening it in the Markdown source.
The header may be omitted in multiline tables as well as simple tables:----------- ------- --------------- ------------------------Firstrow

12.0 Example of a row thatspans multiple lines.

Secondrow

5.0 Here's another one. Notethe blank line between
rows.

----------- ------- --------------- ------------------------: Here's a multiline table without a header.

83

Pandoc’s Markdown
It is possible for a multiline table to have just one row, but the row should be followed by ablank line (and then the row of dashes that ends the table), or the table may be interpreted
as a simple table.

Extension: grid_tables

Grid tables look like this:: Sample grid table.
+---------------+---------------+--------------------+| Fruit| Price| Advantages|+===============+===============+====================+| Bananas| $1.34| - built-in wrapper |||| - bright color|+---------------+---------------+--------------------+| Oranges| $2.10| - cures scurvy

|

|

|

| - tasty|+---------------+---------------+--------------------+The row of =s separates the header from the table body, and can be omitted for a headerlesstable. The cells of grid tables may contain arbitrary block elements (multiple paragraphs,
code blocks, lists, etc.).
Cells can span multiple columns or rows:+---------------------+----------+| Property| Earth|+=============+=======+==========+
|

| min

| -89.2 °C || Temperature +-------+----------+| 1961-1990| mean| 14 °C|+-------+----------+

|

| max

| 56.7 °C||+-------------+-------+----------+A table header may contain more than one row:+---------------------+-----------------------+| Location| Temperature 1961-1990 ||| in degree Celsius|+-------+-------+-------+

84|

Tables|| min| mean| max|+=====================+=======+=======+=======+| Antarctica| -89.2 | N/A| 19.8|+---------------------+-------+-------+-------+| Earth| -89.2 | 14

| 56.7|+---------------------+-------+-------+-------+

Alignments can be specified as with pipe tables, by putting colons at the boundaries of theseparator line after the header:+---------------+---------------+--------------------+| Right| Left| Centered|+==============:+:==============+:==================:+| Bananas| $1.34| built-in wrapper|+---------------+---------------+--------------------+For headerless tables, the colons go on the top line instead:+--------------:+:--------------+:------------------:+| Right| Left| Centered|+---------------+---------------+--------------------+A table foot can be defined by enclosing it with separator lines that use = instead of -:+---------------+---------------+| Fruit| Price|+===============+===============+| Bananas| $1.34|+---------------+---------------+| Oranges| $2.10|+===============+===============+| Sum| $3.44|+===============+===============+

The foot must always be placed at the very bottom of the table.
Grid tables can be created easily using Emacs’ table-mode (M-x table-insert).

85

Pandoc’s Markdown
Extension: pipe_tables

Pipe tables look like this:| Right | Left | Default | Center ||------:|:-----|---------|:------:|
|

12

|

12

|

12

|
|

|

12

123

|

123 |

1

|

1 |

|

123

|

123

|

1

|

1

|

: Demonstration of pipe table syntax.

The syntax is identical to PHP Markdown Extra tables. The beginning and ending pipecharacters are optional, but pipes are required between all columns. The colons indicate
column alignment as shown. The header cannot be omitted. To simulate a headerless table,
include a header with blank cells.
Since the pipes indicate column boundaries, columns need not be vertically aligned, as they
are in the above example. So, this is a perfectly legal (though ugly) pipe table:
fruit| price-----|-----:
apple|2.05
pear|1.37
orange|3.09

The cells of pipe tables cannot contain block elements like paragraphs and lists, and cannot
span multiple lines. If any line of the Markdown source is longer than the column width (see--columns), then the table will take up the full text width and the cell contents will wrap,with the relative cell widths determined by the number of dashes in the line separating thetable header from the table body. (For example ---|- would make the first column 3/4 andthe second column 1/4 of the full text width.) On the other hand, if no lines are wider thancolumn width, then cell contents will not be wrapped, and the cells will be sized to theircontents.
Note: pandoc also recognizes pipe tables of the following form, as can be produced byEmacs’ orgtbl-mode:| One | Two||-----+-------|| my| table || is| nice|The difference is that + is used instead of |. Other orgtbl features are not supported. In
particular, to get non-default column alignment, you’ll need to add colons as above.

86

Metadata blocks

Metadata blocks
Extension: pandoc_title_block

If the file begins with a title block% title% author(s) (separated by semicolons)% dateit will be parsed as bibliographic information, not regular text. (It will be used, for example,
in the title of standalone LaTeX or HTML output.) The block may contain just a title, a title
and an author, or all three elements. If you want to include an author but no title, or a title
and a date but no author, you need a blank line:%% Author% My title%% June 15, 2006

The title may occupy multiple lines, but continuation lines must begin with leading space,thus:% My title
on multiple lines

If a document has multiple authors, the authors may be put on separate lines with leading
space, or separated by semicolons, or both. So, all of the following are equivalent:% Author One
Author Two% Author One; Author Two% Author One;
Author Two

87

Pandoc’s Markdown
The date must fit on one line.
All three metadata fields may contain standard inline formatting (italics, links, footnotes,etc.).
Title blocks will always be parsed, but they will affect the output only when the -standalone (-s) option is chosen. In HTML output, titles will appear twice: once in the
document head—this is the title that will appear at the top of the window in a browser—and
once at the beginning of the document body. The title in the document head can have an
optional prefix attached (--title-prefix or -T option). The title in the body appears as an
H1 element with class “title”, so it can be suppressed or reformatted with CSS. If a title
prefix is specified with -T and no title block appears in the document, the title prefix will be
used by itself as the HTML title.
The man page writer extracts a title, man page section number, and other header and footer
information from the title line. The title is assumed to be the first word on the title line,
which may optionally end with a (single-digit) section number in parentheses. (There
should be no space between the title and the parentheses.) Anything after this is assumed tobe additional footer and header text. A single pipe character (|) should be used to separate
the footer text from the header text. Thus,% PANDOC(1)will yield a man page with the title PANDOC and section 1.
% PANDOC(1) Pandoc User Manuals

will also have “Pandoc User Manuals” in the footer.
% PANDOC(1) Pandoc User Manuals | Version 4.0

will also have “Version 4.0” in the header.

Extension: yaml_metadata_block

A YAML metadata block is a valid YAML object, delimited by a line of three hyphens (---)
at the top and a line of three hyphens (---) or three dots (...) at the bottom. The initial line--- must not be followed by a blank line. A YAML metadata block may occur anywhere in
the document, but if it is not at the beginning, it must be preceded by a blank line.
Note that, because of the way pandoc concatenates input files when several are provided,
you may also keep the metadata in a separate YAML file and pass it to pandoc as anargument, along with your Markdown files:

88Metadata blocks
pandoc chap1.md chap2.md chap3.md metadata.yaml -s -o book.html

Just be sure that the YAML file begins with --- and ends with --- or .... Alternatively, you
can use the --metadata-file option. Using that approach however, you cannot reference
content (like footnotes) from the main Markdown input document.
Metadata will be taken from the fields of the YAML object and added to any existing
document metadata. Metadata can contain lists and objects (nested arbitrarily), but all string
scalars will be interpreted as Markdown. Fields with names ending in an underscore willbe ignored by pandoc. (They may be given a role by external processors.) Field names mustnot be interpretable as YAML numbers or boolean values (so, for example, yes, True, and15 cannot be used as field names).
A document may contain multiple metadata blocks. If two metadata blocks attempt to set
the same field, the value from the second block will be taken.
Each metadata block is handled internally as an independent YAML document. This means,for example, that any YAML anchors defined in a block cannot be referenced in anotherblock.
When pandoc is used with -t markdown to create a Markdown document, a YAML metadata
block will be produced only if the -s/--standalone option is used. All of the metadata willappear in a single block at the beginning of the document.
Note that YAML escaping rules must be followed. Thus, for example, if a title contains acolon, it must be quoted, and if it contains a backslash escape, then it must be ensured that
it is not treated as a YAML escape sequence. The pipe character (|) can be used to begin an
indented block that will be interpreted literally, without need for escaping. This form isnecessary when the field contains blank lines or block-level formatting:--title:'This is the title: it contains a colon'

author:- Author One- Author Two
keywords: [nothing, nothingness]
abstract: |This is the abstract.
It consists of two paragraphs.
...

The literal block after the | must be indented relative to the line containing the |. If it is not,the YAML will be invalid and pandoc will not interpret it as metadata. For an overview of
the complex rules governing YAML, see the Wikipedia entry on YAML syntax.

89

Pandoc’s Markdown
Template variables will be set automatically from the metadata. Thus, for example, in
writing HTML, the variable abstract will be set to the HTML equivalent of the Markdown
in the abstract field:<p>This is the abstract.</p><p>It consists of two paragraphs.</p>

Variables can contain arbitrary YAML structures, but the template must match this structure.
The author variable in the default templates expects a simple list or string, but can bechanged to support more complicated structures. The following combination, for example,
would add an affiliation to the author if one is given:--title: The document title
author:- name: Author One
affiliation: University of Somewhere- name: Author Two
affiliation: University of Nowhere...

To use the structured authors in the example above, you would need a custom template:$for(author)$$if(author.name)$$author.name$$if(author.affiliation)$ ($author.affiliation$)$endif$$else$$author$$endif$$endfor$Raw content to include in the document’s header may be specified using header-includes;
however, it is important to mark up this content as raw code for a particular output format,
using the raw_attribute extension, or it will be interpreted as Markdown. For example:
header-includes:- |```{=latex}\let\oldsection\section\renewcommand{\section}[1]{\clearpage\oldsection{#1}}```90Backslash escapes
Note: the yaml_metadata_block extension works with commonmark as well as markdown(and it is enabled by default in gfm and commonmark_x). However, in these formats thefollowing restrictions apply:• The YAML metadata block must occur at the beginning of the document (and there
can be only one). If multiple files are given as arguments to pandoc, only the first canbe a YAML metadata block.
• The leaf nodes of the YAML structure are parsed in isolation from each other andfrom the rest of the document. So, for example, you can’t use a reference link in thesecontexts if the link definition is somewhere else in the document.

Backslash escapes
Extension: all_symbols_escapable

Except inside a code block or inline code, any punctuation or space character preceded by abackslash will be treated literally, even if it would normally indicate formatting. Thus, forexample, if one writes*\*hello\**

one will get<em>*hello*</em>

instead of<strong>hello</strong>This rule is easier to remember than original Markdown’s rule, which allows only thefollowing characters to be backslash-escaped:\`*_{}[]()>#+-.!

(However, if the markdown_strict format is used, the original Markdown rule will be
used.)
A backslash-escaped space is parsed as a nonbreaking space. In TeX output, it will appear as~. In HTML and XML output, it will appear as a literal unicode nonbreaking space character(note that it will thus actually look “invisible” in the generated HTML source; you can still
use the --ascii command-line option to make it appear as an explicit entity).

91

Pandoc’s Markdown
A backslash-escaped newline (i.e. a backslash occurring at the end of a line) is parsed as a
hard line break. It will appear in TeX output as \\ and in HTML as <br />. This is a nicealternative to Markdown’s “invisible” way of indicating hard line breaks using two trailingspaces on a line.
Backslash escapes do not work in verbatim contexts.

Inline formatting
Emphasis

To emphasize some text, surround it with *s or _, like this:This text is _emphasized with underscores_, and thisis *emphasized with asterisks*.

Double * or _ produces strong emphasis:
This is **strong emphasis** and __with underscores__.

A * or _ character surrounded by spaces, or backslash-escaped, will not trigger emphasis:
This is * not emphasized *, and \*neither is this\*.

Extension: intraword_underscores

Because _ is sometimes used inside words and identifiers, pandoc does not interpret a _surrounded by alphanumeric characters as an emphasis marker. If you want to emphasize
just part of a word, use *:feas*ible*, not feas*able*.

Strikeout
Extension: strikeout

To strike out a section of text with a horizontal line, begin and end it with ~~. Thus, forexample,This ~~is deleted text.~~

92

Inline formatting
Superscripts and subscripts
Extension: superscript, subscript

Superscripts may be written by surrounding the superscripted text by ^ characters; subscripts may be written by surrounding the subscripted text by ~ characters. Thus, forexample,H~2~O is a liquid.

2^10^ is 1024.

The text between ^...^ or ~...~ may not contain spaces or newlines. If the superscripted
or subscripted text contains spaces, these spaces must be escaped with backslashes. (This is
to prevent accidental superscripting and subscripting through the ordinary use of ~ and^, and also bad interactions with footnotes.) Thus, if you want the letter P with ‘a cat’ insubscripts, use P~a\ cat~, not P~a cat~.

Verbatim

To make a short span of text verbatim, put it inside backticks:
What is the difference between `>>=` and `>>`?

If the verbatim text includes a backtick, use double backticks:
Here is a literal backtick `` ` ``.

(The spaces after the opening backticks and before the closing backticks will be ignored.)
The general rule is that a verbatim span starts with a string of consecutive backticks (optionally followed by a space) and ends with a string of the same number of backticks (optionallypreceded by a space).
Note that backslash-escapes (and other Markdown constructs) do not work in verbatim
contexts:
This is a backslash followed by an asterisk: `\*`.

Extension: inline_code_attributes

Attributes can be attached to verbatim text, just as with fenced code blocks:`<$>`{.haskell}93

Pandoc’s Markdown
Underline

To underline text, use the underline class:[Underline]{.underline}

Or, without the bracketed_spans extension (but with native_spans):<span class="underline">Underline</span>This will work in all output formats that support underline.

Small caps

To write small caps, use the smallcaps class:[Small caps]{.smallcaps}

Or, without the bracketed_spans extension:<span class="smallcaps">Small caps</span>

For compatibility with other Markdown flavors, CSS is also supported:<span style="font-variant:small-caps;">Small caps</span>This will work in all output formats that support small caps.

Highlighting

To highlight text, use the mark class:[Mark]{.mark}Or, without the bracketed_spans extension (but with native_spans):<span class="mark">Mark</span>This will work in all output formats that support highlighting.

94

Math

Math

Extension: tex_math_dollars

Anything between two $ characters will be treated as TeX math. The opening $ must havea non-space character immediately to its right, while the closing $ must have a non-spacecharacter immediately to its left, and must not be followed immediately by a digit. Thus,$20,000 and $30,000 won’t parse as math. If for some reason you need to enclose text inliteral $ characters, backslash-escape them and they won’t be treated as math delimiters.
For display math, use $$ delimiters. (In this case, the delimiters may be separated from theformula by whitespace. However, there can be no blank lines between the opening andclosing $$ delimiters.)
TeX math will be printed in all output formats. How it is rendered depends on the output
format:
LaTeX It will appear verbatim surrounded by \(...\) (for inline math) or \[...\] (fordisplay math).
Markdown, Emacs Org mode, ConTeXt, ZimWiki It will appear verbatim surrounded by$...$ (for inline math) or $$...$$ (for display math).

XWiki It will appear verbatim surrounded by {{formula}}..{{/formula}}.
reStructuredText It will be rendered using an interpreted text role :math:.
AsciiDoc For AsciiDoc output math will appear verbatim surrounded by latexmath:[...].

For asciidoc_legacy the bracketed material will also include inline or display mathdelimiters.
Texinfo It will be rendered inside a @math command.
roff man, Jira markup It will be rendered verbatim without $’s.
MediaWiki, DokuWiki It will be rendered inside <math> tags.
Textile It will be rendered inside <span class="math"> tags.
RTF, OpenDocument It will be rendered, if possible, using Unicode characters, and willotherwise appear verbatim.
ODT It will be rendered, if possible, using MathML.
DocBook If the --mathml flag is used, it will be rendered using MathML in an
inlineequation or informalequation tag. Otherwise it will be rendered, if
possible, using Unicode characters.
Docx and PowerPoint It will be rendered using OMML math markup.
FictionBook2 If the --webtex option is used, formulas are rendered as images using
CodeCogs or other compatible web service, downloaded and embedded in the e-book.
Otherwise, they will appear verbatim.
HTML, Slidy, DZSlides, S5, EPUB The way math is rendered in HTML will depend on thecommand-line options selected. Therefore see Math rendering in HTML above.

95

Pandoc’s Markdown

Raw HTML
Extension: raw_html

Markdown allows you to insert raw HTML (or DocBook) anywhere in a document (except
verbatim contexts, where <, >, and & are interpreted literally). (Technically this is not an
extension, since standard Markdown allows it, but it has been made an extension so that it
can be disabled if desired.)
The raw HTML is passed through unchanged in HTML, S5, Slidy, Slideous, DZSlides, EPUB,
Markdown, CommonMark, Emacs Org mode, and Textile output, and suppressed in otherformats.
For a more explicit way of including raw HTML in a Markdown document, see theraw_attribute extension.
In the CommonMark format, if raw_html is enabled, superscripts, subscripts, strikeouts andsmall capitals will be represented as HTML. Otherwise, plain-text fallbacks will be used.
Note that even if raw_html is disabled, tables will be rendered with HTML syntax if theycannot use pipe syntax.

Extension: markdown_in_html_blocks

Original Markdown allows you to include HTML “blocks”: blocks of HTML between
balanced tags that are separated from the surrounding text with blank lines, and startand end at the left margin. Within these blocks, everything is interpreted as HTML, notMarkdown; so (for example), * does not signify emphasis.
Pandoc behaves this way when the markdown_strict format is used; but by default, pandoc
interprets material between HTML block tags as Markdown. Thus, for example, pandoc
will turn<table><tr><td>*one*</td><td>[a link](https://google.com)</td></tr></table>into<table><tr><td><em>one</em></td>96Raw HTML<td><a href="https://google.com">a link</a></td></tr></table>whereas Markdown.pl will preserve it as is.
There is one exception to this rule: text between <script>, <style>, <pre>, and <textarea>tags is not interpreted as Markdown.
This departure from original Markdown should make it easier to mix Markdown withHTML block elements. For example, one can surround a block of Markdown text with<div> tags without preventing it from being interpreted as Markdown.

Extension: native_divs

Use native pandoc Div blocks for content inside <div> tags. For the most part this should
give the same output as markdown_in_html_blocks, but it makes it easier to write pandoc
filters to manipulate groups of blocks.

Extension: native_spans

Use native pandoc Span blocks for content inside <span> tags. For the most part this should
give the same output as raw_html, but it makes it easier to write pandoc filters to manipulategroups of inlines.

Extension: raw_tex

In addition to raw HTML, pandoc allows raw LaTeX, TeX, and ConTeXt to be included in adocument. Inline TeX commands will be preserved and passed unchanged to the LaTeX
and ConTeXt writers. Thus, for example, you can use LaTeX to include BibTeX citations:This result was proved in \cite{jones.1967}.

Note that in LaTeX environments, like\begin{tabular}{|l|l|}\hline
Age & Frequency \\ \hline
18--25& 15 \\

26--35& 33 \\

36--45& 22 \\ \hline\end{tabular}

97

Pandoc’s Markdown
the material between the begin and end tags will be interpreted as raw LaTeX, not as
Markdown.
For a more explicit and flexible way of including raw TeX in a Markdown document, see
the raw_attribute extension.
Inline LaTeX is ignored in output formats other than Markdown, LaTeX, Emacs Org mode,and ConTeXt.
Generic raw attribute
Extension: raw_attribute

Inline spans and fenced code blocks with a special kind of attribute will be parsed as raw
content with the designated format. For example, the following produces a raw roff ms
block:```{=ms}.MYMACRO
blah blah```

And the following produces a raw html inline element:This is `<a>html</a>`{=html}

This can be useful to insert raw xml into docx documents, e.g. a pagebreak:```{=openxml}
<w:p>
<w:r>
<w:br w:type="page"/></w:r></w:p>```

The format name should match the target format name (see -t/--to, above, for a list, or
use pandoc --list-output-formats). Use openxml for docx output, opendocument for odt
output, html5 for epub3 output, html4 for epub2 output, and latex, beamer, ms, or html5
for pdf output (depending on what you use for --pdf-engine).
This extension presupposes that the relevant kind of inline code or fenced code blockis enabled. Thus, for example, to use a raw attribute with a backtick code block,backtick_code_blocks must be enabled.
The raw attribute cannot be combined with regular attributes.

98

LaTeX macros

LaTeX macros
Extension: latex_macros

When this extension is enabled, pandoc will parse LaTeX macro definitions and apply the
resulting macros to all LaTeX math and raw LaTeX. So, for example, the following will
work in all output formats, not just LaTeX:\newcommand{\tuple}[1]{\langle #1 \rangle}$\tuple{a, b, c}$Note that LaTeX macros will not be applied if they occur inside a raw span or block marked
with the raw_attribute extension.
When latex_macros is disabled, the raw LaTeX and math will not have macros applied.
This is usually a better approach when you are targeting LaTeX or PDF.
Macro definitions in LaTeX will be passed through as raw LaTeX only if latex_macros is
not enabled. Macro definitions in Markdown source (or other formats allowing raw_tex)
will be passed through regardless of whether latex_macros is enabled.

Links
Markdown allows links to be specified in several ways.

Automatic links

If you enclose a URL or email address in pointy brackets, it will become a link:<https://google.com><sam@green.eggs.ham>

Inline links

An inline link consists of the link text in square brackets, followed by the URL in parentheses.
(Optionally, the URL can be followed by a link title, in quotes.)
This is an [inline link](/url), and here's [one witha title](https://fsf.org "click here for a good time!").

99

Pandoc’s Markdown
There can be no space between the bracketed part and the parenthesized part. The link text
can contain formatting (such as emphasis), but the title cannot.
Email addresses in inline links are not autodetected, so they have to be prefixed with
mailto:[Write me!](mailto:sam@green.eggs.ham)

Reference links

An explicit reference link has two parts, the link itself and the link definition, which may
occur elsewhere in the document (either before or after the link).
The link consists of link text in square brackets, followed by a label in square brackets.
(There cannot be space between the two unless the spaced_reference_links extension
is enabled.) The link definition consists of the bracketed label, followed by a colon anda space, followed by the URL, and optionally (after a space) a link title either in quotes
or in parentheses. The label must not be parseable as a citation (assuming the citations
extension is enabled): citations take precedence over link labels.
Here are some examples:[my label 1]: /foo/bar.html"My title, optional"[my label 2]: /foo
[my label 3]: https://fsf.org (The Free Software Foundation)[my label 4]: /bar#special'A title in single quotes'

The URL may optionally be surrounded by angle brackets:[my label 5]: <http://foo.bar.baz>

The title may go on the next line:[my label 3]: https://fsf.org"The Free Software Foundation"

Note that link labels are not case sensitive. So, this will work:
Here is [my link][FOO][Foo]: /bar/baz

In an implicit reference link, the second pair of brackets is empty:

100LinksSee [my website][].
[my website]: http://foo.bar.baz

Note: In Markdown.pl and most other Markdown implementations, reference link definitions cannot occur in nested constructions such as list items or block quotes. Pandoc lifts
this arbitrary-seeming restriction. So the following is fine in pandoc, though not in mostother implementations:> My block [quote].
>> [quote]: /foo

Extension: shortcut_reference_links

In a shortcut reference link, the second pair of brackets may be omitted entirely:

See [my website].
[my website]: http://foo.bar.baz

Internal links

To link to another section of the same document, use the automatically generated identifier(see Heading identifiers). For example:

See the [Introduction](#introduction).

or

See the [Introduction].
[Introduction]: #introduction

Internal links are currently supported for HTML formats (including HTML slide shows andEPUB), LaTeX, and ConTeXt.

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Pandoc’s Markdown

ImagesA link immediately preceded by a ! will be treated as an image. The link text will be usedas the image’s alt text:![la lune](lalune.jpg "Voyage to the moon")![movie reel][movie reel]: movie.gif

Extension: implicit_figures

An image with nonempty alt text, occurring by itself in a paragraph, will be rendered as a
figure with a caption. The image’s alt text will be used as the caption.

![This is the caption](/url/of/image.png)

How this is rendered depends on the output format. Some output formats (e.g. RTF) do not
yet support figures. In those formats, you’ll just get an image in a paragraph by itself, withno caption.
If you just want a regular inline image, just make sure it is not the only thing in the paragraph.
One way to do this is to insert a nonbreaking space after the image:![This image won't be a figure](/url/of/image.png)\

Note that in reveal.js slide shows, an image in a paragraph by itself that has the r-stretch
class will fill the screen, and the caption and figure tags will be omitted.

Extension: link_attributes

Attributes can be set on links and images:

An inline ![image](foo.jpg){#id .class width=30 height=20px}
and a reference ![image][ref] with attributes.
[ref]: foo.jpg "optional title" {#id .class key=val key2="val 2"}

102

Divs and Spans(This syntax is compatible with PHP Markdown Extra when only #id and .class areused.)For HTML and EPUB, all known HTML5 attributes except width and height (but including
srcset and sizes) are passed through as is. Unknown attributes are passed through as
custom attributes, with data- prepended. The other writers ignore attributes that are notspecifically supported by their output format.
The width and height attributes on images are treated specially. When used without a unit,
the unit is assumed to be pixels. However, any of the following unit identifiers can be used:px, cm, mm, in, inch and %. There must not be any spaces between the number and the unit.
For example:![](file.jpg){ width=50% }• Dimensions may be converted to a form that is compatible with the output format(for example, dimensions given in pixels will be converted to inches when converting
HTML to LaTeX). Conversion between pixels and physical measurements is affectedby the --dpi option (by default, 96 dpi is assumed, unless the image itself contains
dpi information).
• The % unit is generally relative to some available space. For example the above example
will render to the following.
– HTML: <img href="file.jpg" style="width: 50%;" />– LaTeX: \includegraphics[width=0.5\textwidth,height=\textheight]{file.jpg}(If you’re using a custom template, you need to configure graphicx as in thedefault template.)– ConTeXt: \externalfigure[file.jpg][width=0.5\textwidth]• Some output formats have a notion of a class (ConTeXt) or a unique identifier (LaTeX\caption), or both (HTML).
• When no width or height attributes are specified, the fallback is to look at the image
resolution and the dpi metadata embedded in the image file.

Divs and Spans

Using the native_divs and native_spans extensions (see above), HTML syntax can beused as part of Markdown to create native Div and Span elements in the pandoc AST (asopposed to raw HTML). However, there is also nicer syntax available:103

Pandoc’s Markdown
Extension: fenced_divs

Allow special fenced syntax for native Div blocks. A Div starts with a fence containing
at least three consecutive colons plus some attributes. The attributes may optionally befollowed by another string of consecutive colons.
Note: the commonmark parser doesn’t permit colons after the attributes.
The attribute syntax is exactly as in fenced code blocks (see Extension: fenced_code_attributes).
As with fenced code blocks, one can use either attributes in curly braces or a single unbraced
word, which will be treated as a class name. The Div ends with another line containing astring of at least three consecutive colons. The fenced Div should be separated by blanklines from preceding and following blocks.
Example:::::: {#special .sidebar}
Here is a paragraph.
And another.
:::::Fenced divs can be nested. Opening fences are distinguished because they must haveattributes:::: Warning ::::::
This is a warning.
::: Danger
This is a warning within a warning.
:::::::::::::::::::::

Fences without attributes are always closing fences. Unlike with fenced code blocks, thenumber of colons in the closing fence need not match the number in the opening fence.
However, it can be helpful for visual clarity to use fences of different lengths to distinguishnested divs from their parents.

Extension: bracketed_spans

A bracketed sequence of inlines, as one would use to begin a link, will be treated as a Spanwith attributes if it is followed immediately by attributes:[This is *some text*]{.class key="val"}

104

Footnotes

Footnotes
Extension: footnotes

Pandoc’s Markdown allows footnotes, using the following syntax:
Here is a footnote reference,[^1] and another.[^longnote][^1]: Here is the footnote.
[^longnote]: Here's one with multiple blocks.
Subsequent paragraphs are indented to show that they
belong to the previous footnote.
{ some.code }The whole paragraph can be indented, or just the firstline.

In this way, multi-paragraph footnotes work like

multi-paragraph list items.
This paragraph won't be part of the note, because it
isn't indented.

The identifiers in footnote references may not contain spaces, tabs, newlines, or the characters^, [, or ]. These identifiers are used only to correlate the footnote reference with the note
itself; in the output, footnotes will be numbered sequentially.
The footnotes themselves need not be placed at the end of the document. They may appear
anywhere except inside other block elements (lists, block quotes, tables, etc.). Each footnote
should be separated from surrounding content (including other footnotes) by blank lines.

Extension: inline_notes

Inline footnotes are also allowed (though, unlike regular notes, they cannot contain multiple
paragraphs). The syntax is as follows:
Here is an inline note.^[Inline notes are easier to write, since
you don't have to pick an identifier and move down to type thenote.]

Inline and regular footnotes may be mixed freely.

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Pandoc’s Markdown

Citation syntax
Extension: citations

To cite a bibliographic item with an identifier foo, use the syntax @foo. Normal citations
should be included in square brackets, with semicolons separating distinct items:
Blah blah [@doe99; @smith2000; @smith2004].

How this is rendered depends on the citation style. In an author-date style, it might renderasBlah blah (Doe 1999, Smith 2000, 2004).

In a footnote style, it might render as
Blah blah.[^1][^1]:John Doe, "Frogs," *Journal of Amphibians* 44 (1999);

Susan Smith, "Flies," *Journal of Insects* (2000);
Susan Smith, "Bees," *Journal of Insects* (2004).

See the CSL user documentation for more information about CSL styles and how they affectrendering.
Unless a citation key starts with a letter, digit, or _, and contains only alphanumerics
and single internal punctuation characters (:.#$%&-+?<>~/), it must be surrounded by
curly braces, which are not considered part of the key. In @Foo_bar.baz., the key is
Foo_bar.baz because the final period is not internal punctuation, so it is not includedin the key. In @{Foo_bar.baz.}, the key is Foo_bar.baz., including the final period.
In @Foo_bar--baz, the key is Foo_bar because the repeated internal punctuation characters terminate the key. The curly braces are recommended if you use URLs as keys:[@{https://example.com/bib?name=foobar&date=2000}, p. 33].
Citation items may optionally include a prefix, a locator, and a suffix. In
Blah blah [see @doe99, pp. 33-35 and *passim*; @smith04, chap. 1].

the first item (doe99) has prefix see, locator pp. 33-35, and suffix and *passim*. The
second item (smith04) has locator chap. 1 and no prefix or suffix.
Pandoc uses some heuristics to separate the locator from the rest of the subject. It is sensitive
to the locator terms defined in the CSL locale files. Either abbreviated or unabbreviated106Non-default extensions
forms are accepted. In the en-US locale, locator terms can be written in either singular orplural forms, as book, bk./bks.; chapter, chap./chaps.; column, col./cols.; figure,fig./figs.; folio, fol./fols.; number, no./nos.; line, l./ll.; note, n./nn.; opus,
op./opp.; page, p./pp.; paragraph, para./paras.; part, pt./pts.; section, sec./secs.;
sub verbo, s.v./s.vv.; verse, v./vv.; volume, vol./vols.; ¶/¶¶; §/§§. If no locator term
is used, “page” is assumed.
In complex cases, you can force something to be treated as a locator by enclosing it in curly
braces or prevent parsing the suffix as locator by prepending curly braces:[@smith{ii, A, D-Z}, with a suffix][@smith, {pp. iv, vi-xi, (xv)-(xvii)} with suffix here][@smith{}, 99 years later]

A minus sign (-) before the @ will suppress mention of the author in the citation. This canbe useful when the author is already mentioned in the text:
Smith says blah [-@smith04].

You can also write an author-in-text citation, by omitting the square brackets:@smith04 says blah.
@smith04 [p. 33] says blah.

This will cause the author’s name to be rendered, followed by the bibliographical details.
Use this form when you want to make the citation the subject of a sentence.
When you are using a note style, it is usually better to let citeproc create the footnotes fromcitations rather than writing an explicit note. If you do write an explicit note that contains acitation, note that normal citations will be put in parentheses, while author-in-text citations
will not. For this reason, it is sometimes preferable to use the author-in-text style inside
notes when using a note style.

Non-default extensions
The following Markdown syntax extensions are not enabled by default in pandoc, but may
be enabled by adding +EXTENSION to the format name, where EXTENSION is the name of theextension. Thus, for example, markdown+hard_line_breaks is Markdown with hard line
breaks.

107

Pandoc’s Markdown
Extension: rebase_relative_paths

Rewrite relative paths for Markdown links and images, depending on the path of the filecontaining the link or image link. For each link or image, pandoc will compute the directoryof the containing file, relative to the working directory, and prepend the resulting path tothe link or image path.
The use of this extension is best understood by example. Suppose you have a subdirectory for each chapter of a book, chap1, chap2, chap3. Each contains a file text.md and anumber of images used in the chapter. You would like to have ![image](spider.jpg) inchap1/text.md refer to chap1/spider.jpg and ![image](spider.jpg) in chap2/text.md
refer to chap2/spider.jpg. To do this, use
pandoc chap*/*.md -f markdown+rebase_relative_paths

Without this extension, you would have to use ![image](chap1/spider.jpg) inchap1/text.md and ![image](chap2/spider.jpg) in chap2/text.md. Links with relative
paths will be rewritten in the same way as images.
Absolute paths and URLs are not changed. Neither are empty paths or paths consisting
entirely of a fragment, e.g., #foo.
Note that relative paths in reference links and images will be rewritten relative to the filecontaining the link reference definition, not the file containing the reference link or image
itself, if these differ.

Extension: markTo highlight out a section of text, begin and end it with with ==. Thus, for example,
This ==is deleted text.==

Extension: attributes

Allows attributes to be attached to any inline or block-level element when parsing
commonmark. The syntax for the attributes is the same as that used in header_attributes.
• Attributes that occur immediately after an inline element affect that element. Ifthey follow a space, then they belong to the space. (Hence, this option subsumes
inline_code_attributes and link_attributes.)• Attributes that occur immediately before a block element, on a line by themselves,affect that element.
• Consecutive attribute specifiers may be used, either for blocks or for inlines. Their
attributes will be combined.

108Non-default extensions• Attributes that occur at the end of the text of a Setext or ATX heading (separated bywhitespace from the text) affect the heading element. (Hence, this option subsumes
header_attributes.)• Attributes that occur after the opening fence in a fenced code block affect the code
block element. (Hence, this option subsumes fenced_code_attributes.)• Attributes that occur at the end of a reference link definition affect links that refer tothat definition.
Note that pandoc’s AST does not currently allow attributes to be attached to arbitrary
elements. Hence a Span or Div container will be added if needed.

Extension: old_dashes

Selects the pandoc <= 1.8.2.1 behavior for parsing smart dashes: - before a numeral is an
en-dash, and -- is an em-dash. This option only has an effect if smart is enabled. It isselected automatically for textile input.

Extension: angle_brackets_escapable

Allow < and > to be backslash-escaped, as they can be in GitHub flavored Markdown but
not original Markdown. This is implied by pandoc’s default all_symbols_escapable.

Extension: lists_without_preceding_blankline

Allow a list to occur right after a paragraph, with no intervening blank space.

Extension: four_space_rule

Selects the pandoc <= 2.0 behavior for parsing lists, so that four spaces indent are needed
for list item continuation paragraphs.

Extension: spaced_reference_links

Allow whitespace between the two components of a reference link, for example,[foo] [bar].

109

Pandoc’s Markdown
Extension: hard_line_breaks

Causes all newlines within a paragraph to be interpreted as hard line breaks instead ofspaces.

Extension: ignore_line_breaks

Causes newlines within a paragraph to be ignored, rather than being treated as spaces or as
hard line breaks. This option is intended for use with East Asian languages where spaces
are not used between words, but text is divided into lines for readability.

Extension: east_asian_line_breaks

Causes newlines within a paragraph to be ignored, rather than being treated as spaces or as
hard line breaks, when they occur between two East Asian wide characters. This is a better
choice than ignore_line_breaks for texts that include a mix of East Asian wide charactersand other characters.

Extension: emojiParses textual emojis like :smile: as Unicode emoticons.

Extension: tex_math_gfm

Supports two GitHub-specific formats for math. Inline math: $`e=mc^2`$.
Display math:``` mathe=mc^2```

Extension: tex_math_single_backslash

Causes anything between \( and \) to be interpreted as inline TeX math, and anything
between \[ and \] to be interpreted as display TeX math. Note: a drawback of this extension
is that it precludes escaping ( and [.

110

Non-default extensions
Extension: tex_math_double_backslash

Causes anything between \\( and \\) to be interpreted as inline TeX math, and anything
between \\[ and \\] to be interpreted as display TeX math.

Extension: markdown_attribute

By default, pandoc interprets material inside block-level tags as Markdown. This extension
changes the behavior so that Markdown is only parsed inside block-level tags if the tags
have the attribute markdown=1.

Extension: mmd_title_block

Enables a MultiMarkdown style title block at the top of the document, for example:
Title:

My title

Author:John Doe

Date:

September 1, 2008

Comment: This is a sample mmd title block, witha field spanning multiple lines.

See the MultiMarkdown documentation for details.
If pandoc_title_block or
yaml_metadata_block is enabled, it will take precedence over mmd_title_block.

Extension: abbreviations

Parses PHP Markdown Extra abbreviation keys, like*[HTML]: Hypertext Markup Language

Note that the pandoc document model does not support abbreviations, so if this extension isenabled, abbreviation keys are simply skipped (as opposed to being parsed as paragraphs).

Extension: alerts

Supports GitHub-style Markdown alerts, like> [!TIP]> Helpful advice for doing things better or more easily.

111

Pandoc’s Markdown
Extension: autolink_bare_uris

Makes all absolute URIs into links, even when not surrounded by pointy braces <...>.

Extension: mmd_link_attributes

Parses MultiMarkdown-style key-value attributes on link and image references. This extension should not be confused with the link_attributes extension.
This is a reference ![image][ref] with MultiMarkdown attributes.
[ref]: https://path.to/image "Image title" width=20px height=30px
id=myId class="myClass1 myClass2"

Extension: mmd_header_identifiers

Parses MultiMarkdown-style heading identifiers (in square brackets, after the heading but
before any trailing #s in an ATX heading).

Extension: compact_definition_lists

Activates the definition list syntax of pandoc 1.12.x and earlier. This syntax differs from theone described above under Definition lists in several respects:• No blank line is required between consecutive items of the definition list.
• To get a “tight” or “compact” list, omit space between consecutive items; the space
between a term and its definition does not affect anything.
• Lazy wrapping of paragraphs is not allowed: the entire definition must be indented
four spaces.4

Extension: gutenberg

Use Project Gutenberg conventions for plain output: all-caps for strong emphasis, surroundby underscores for regular emphasis, add extra blank space around headings.
4

To see why laziness is incompatible with relaxing the requirement of a blank line between items, consider
the following example:bar:definitionfoo:definition

Is this a single list item with two definitions of “bar,” the first of which is lazily wrapped, or two list items?
To remove the ambiguity we must either disallow lazy wrapping or require a blank line between list items.

112Markdown variants
Extension: sourcepos

Include source position attributes when parsing commonmark. For elements that accept
attributes, a data-pos attribute is added; other elements are placed in a surrounding Div orSpan element with a data-pos attribute.

Extension: short_subsuperscripts

Parse MultiMarkdown-style subscripts and superscripts, which start with a ‘~’ or ‘^’ character, respectively, and include the alphanumeric sequence that follows. For example:x^2 = 4orOxygen is O~2.

Extension: wikilinks_title_after_pipe

Pandoc supports multiple Markdown wikilink syntaxes, regardless of whether the title isbefore or after the pipe.
Using --from=markdown+wikilinks_title_after_pipe results in[[URL|title]]

while using --from=markdown+wikilinks_title_before_pipe results in[[title|URL]]

Markdown variants
In addition to pandoc’s extended Markdown, the following Markdown variants are supported:• markdown_phpextra (PHP Markdown Extra)• markdown_github (deprecated GitHub-Flavored Markdown)• markdown_mmd (MultiMarkdown)• markdown_strict (Markdown.pl)• commonmark (CommonMark)• gfm (Github-Flavored Markdown)• commonmark_x (CommonMark with many pandoc extensions)113

Pandoc’s Markdown
To see which extensions are supported for a given format, and which are enabled by default,
you can use the command
pandoc --list-extensions=FORMAT

where FORMAT is replaced with the name of the format.
Note that the list of extensions for commonmark, gfm, and commonmark_x are defined relative
to default commonmark. So, for example, backtick_code_blocks does not appear as anextension, since it is enabled by default and cannot be disabled.

114

Citations
When the --citeproc option is used, pandoc can automatically generate citations and abibliography in a number of styles. Basic usage ispandoc --citeproc myinput.txt

To use this feature, you will need to have• a document containing citations (see Citation syntax);• a source of bibliographic data: either an external bibliography file or a list ofreferences in the document’s YAML metadata;• optionally, a CSL citation style.

Specifying bibliographic data
You can specify an external bibliography using the bibliography metadata field in a YAML
metadata section or the --bibliography command line argument. If you want to use
multiple bibliography files, you can supply multiple --bibliography arguments or set
bibliography metadata field to YAML array. A bibliography may have any of these formats:FormatFile extension

BibLaTeX
BibTeXCSL JSONCSL YAML
RIS.bib.bibtex
.json
.yaml
.ris

Note that .bib can be used with both BibTeX and BibLaTeX files; use the extension .bibtex
to force interpretation as BibTeX.
In BibTeX and BibLaTeX databases, pandoc parses LaTeX markup inside fields such as title;
in CSL YAML databases, pandoc Markdown; and in CSL JSON databases, an HTML-likemarkup:115

Citations<i>...</i> italics<b>...</b> bold<span style="font-variant:small-caps;">...</span> or <sc>...</sc> small capitals<sub>...</sub> subscript<sup>...</sup> superscript<span class="nocase">...</span> prevent a phrase from being capitalized as title case

As an alternative to specifying a bibliography file using --bibliography or the YAML
metadata field bibliography, you can include the citation data directly in the references
field of the document’s YAML metadata. The field should contain an array of YAMLencoded references, for example:--references:- type: article-journal
id: WatsonCrick1953
author:- family: Watson
given: J. D.
- family: Crickgiven: F. H. C.
issued:date-parts:- - 1953- 4- 25
title: 'Molecular structure of nucleic acids: a structure fordeoxyribose nucleic acid'
title-short: Molecular structure of nucleic acids
container-title: Naturevolume: 171
issue: 4356
page: 737-738
DOI: 10.1038/171737a0
URL: https://www.nature.com/articles/171737a0
language: en-GB...

If both an external bibliography and inline (YAML metadata) references are provided, bothwill be used. In case of conflicting ids, the inline references will take precedence.
Note that pandoc can be used to produce such a YAML metadata section from a BibTeX,
BibLaTeX, or CSL JSON bibliography:

116

Specifying bibliographic data
pandoc chem.bib -s -f biblatex -t markdown
pandoc chem.json -s -f csljson -t markdown

Indeed, pandoc can convert between any of these citation formats:pandoc chem.bib -s -f biblatex -t csljson
pandoc chem.yaml -s -f markdown -t biblatex

Running pandoc on a bibliography file with the --citeproc option will create a formatted
bibliography in the format of your choice:pandoc chem.bib -s --citeproc -o chem.html
pandoc chem.bib -s --citeproc -o chem.pdf

Capitalization in titles

If you are using a bibtex or biblatex bibliography, then observe the following rules:• English titles should be in title case. Non-English titles should be in sentence case,and the langid field in biblatex should be set to the relevant language. (The following
values are treated as English: american, british, canadian, english, australian,newzealand, USenglish, or UKenglish.)• As is standard with bibtex/biblatex, proper names should be protected with curly
braces so that they won’t be lowercased in styles that call for sentence case. For
example:title = {My Dinner with {Andre}}• In addition, words that should remain lowercase (or camelCase) should be protected:
title = {Spin Wave Dispersion on the {nm} Scale}Though this is not necessary in bibtex/biblatex, it is necessary with citeproc, which
stores titles internally in sentence case, and converts to title case in styles that requireit. Here we protect “nm” so that it doesn’t get converted to “Nm” at this stage.
If you are using a CSL bibliography (either JSON or YAML), then observe the following
rules:• All titles should be in sentence case.
• Use the language field for non-English titles to prevent their conversion to title casein styles that call for this. (Conversion happens only if language begins with en or isleft empty.)

117

Citations• Protect words that should not be converted to title case using this syntax:
Spin wave dispersion on the <span class="nocase">nm</span> scale

Conference Papers, Published vs. Unpublished

For a formally published conference paper, use the biblatex entry type inproceedings(which will be mapped to CSL paper-conference).
For an unpublished manuscript, use the biblatex entry type unpublished without an
eventtitle field (this entry type will be mapped to CSL manuscript).
For a talk, an unpublished conference paper, or a poster presentation, use the biblatex
entry type unpublished with an eventtitle field (this entry type will be mapped to CSL
speech). Use the biblatex type field to indicate the type, e.g. “Paper”, or “Poster”. venue andeventdate may be useful too, though eventdate will not be rendered by most CSL styles.
Note that venue is for the event’s venue, unlike location which describes the publisher’slocation; do not use the latter for an unpublished conference paper.

Specifying a citation style
Citations and references can be formatted using any style supported by the Citation Style
Language, listed in the Zotero Style Repository. These files are specified using the --csl
option or the csl (or citation-style) metadata field. By default, pandoc will use theChicago Manual of Style author-date format. (You can override this default by copyinga CSL style of your choice to default.csl in your user data directory.) The CSL projectprovides further information on finding and editing styles.
The --citation-abbreviations option (or the citation-abbreviations metadata field)
may be used to specify a JSON file containing abbreviations of journals that should be usedin formatted bibliographies when form="short" is specified. The format of the file can beillustrated with an example:{ "default": {"container-title": {"Lloyd's Law Reports": "Lloyd's Rep","Estates Gazette": "EG","Scots Law Times": "SLT"
}
}
}

118

Citations in note styles

Citations in note styles
Pandoc’s citation processing is designed to allow you to move between author-date, numerical, and note styles without modifying the Markdown source. When you’re using a notestyle, avoid inserting footnotes manually. Instead, insert citations just as you would in an
author-date style—for example,

Blah blah [@foo, p. 33].

The footnote will be created automatically. Pandoc will take care of removing the spaceand moving the note before or after the period, depending on the setting of notes-afterpunctuation, as described below in Other relevant metadata fields.
In some cases you may need to put a citation inside a regular footnote. Normal citations
in footnotes (such as [@foo, p. 33]) will be rendered in parentheses. In-text citations(such as @foo [p. 33]) will be rendered without parentheses. (A comma will be added if
appropriate.) Thus:[^1]:

Some studies [@foo; @bar, p. 33] show thatfrubulicious zoosnaps are quantical.

For a surveyof the literature, see @baz [chap. 1].

Placement of the bibliography
If the style calls for a list of works cited, it will be placed in a div with id refs, if one exists:::: {#refs}:::

Otherwise, it will be placed at the end of the document. Generation of the bibliography canbe suppressed by setting suppress-bibliography: true in the YAML metadata.
If you wish the bibliography to have a section heading, you can set reference-sectiontitle in the metadata, or put the heading at the beginning of the div with id refs (if you
are using it) or at the end of your document:

last paragraph...
# References

119Citations
The bibliography will be inserted after this heading. Note that the unnumbered class will be
added to this heading, so that the section will not be numbered.
If you want to put the bibliography into a variable in your template, one way to do that is
to put the div with id refs into a metadata field, e.g.
--refs: |::: {#refs}:::...

You can then put the variable $refs$ into your template where you want the bibliography
to be placed.

Including uncited items in the bibliography
If you want to include items in the bibliography without actually citing them in the bodytext, you can define a dummy nocite metadata field and put the citations there:--nocite: |@item1, @item2...
@item3In this example, the document will contain a citation for item3 only, but the bibliography
will contain entries for item1, item2, and item3.
It is possible to create a bibliography with all the citations, whether or not they appear in
the document, by using a wildcard:--nocite: |@*...

For LaTeX output, you can also use natbib or biblatex to render the bibliography. In orderto do so, specify bibliography files as outlined above, and add --natbib or --biblatex
argument to pandoc invocation. Bear in mind that bibliography files have to be in either
BibTeX (for --natbib) or BibLaTeX (for --biblatex) format.

120

Other relevant metadata fields

Other relevant metadata fields
A few other metadata fields affect bibliography formatting:link-citations If true, citations will be hyperlinked to the corresponding bibliography

entries (for author-date and numerical styles only). Defaults to false.
link-bibliography If true, DOIs, PMCIDs, PMID, and URLs in bibliographies will berendered as hyperlinks. (If an entry contains a DOI, PMCID, PMID, or URL, but noneof these fields are rendered by the style, then the title, or in the absence of a title thewhole entry, will be hyperlinked.) Defaults to true.
lang The lang field will affect how the style is localized, for example in the translationof labels, the use of quotation marks, and the way items are sorted. (For backwards
compatibility, locale may be used instead of lang, but this use is deprecated.)
A BCP 47 language tag is expected: for example, en, de, en-US, fr-CA, ug-Cyrl. The
unicode extension syntax (after -u-) may be used to specify options for collation(sorting) more precisely. Here are some examples:• zh-u-co-pinyin: Chinese with the Pinyin collation.
• es-u-co-trad: Spanish with the traditional collation (with Ch sorting after C).
• fr-u-kb: French with “backwards” accent sorting (with coté sorting after côte).
• en-US-u-kf-upper: English with uppercase letters sorting before lower (default
is lower before upper).
notes-after-punctuation If true (the default for note styles), pandoc will put footnote

references or superscripted numerical citations after following punctuation. For
example, if the source contains blah blah [@jones99]., the result will look like blahblah.[^1], with the note moved after the period and the space collapsed. If false, thespace will still be collapsed, but the footnote will not be moved after the punctuation.
The option may also be used in numerical styles that use superscripts for citation
numbers (but for these styles the default is not to move the citation).

121

Slide shows
You can use pandoc to produce an HTML + JavaScript slide presentation that can be viewed
via a web browser. There are five ways to do this, using S5, DZSlides, Slidy, Slideous, or
reveal.js. You can also produce a PDF slide show using LaTeX beamer, or slide shows in
Microsoft PowerPoint format.
Here’s the Markdown source for a simple slide show, habits.txt:% Habits% John Doe% March 22, 2005
# In the morning## Getting up- Turn off alarm- Get out of bed## Breakfast- Eat eggs
- Drink coffee# In the evening## Dinner- Eat spaghetti- Drink wine-----------------![picture of spaghetti](images/spaghetti.jpg)## Going to sleep

123

Slide shows- Get in bed- Count sheep

To produce an HTML/JavaScript slide show, simply type
pandoc -t FORMAT -s habits.txt -o habits.html

where FORMAT is either s5, slidy, slideous, dzslides, or revealjs.
For Slidy, Slideous, reveal.js, and S5, the file produced by pandoc with the -s/--standalone
option embeds a link to JavaScript and CSS files, which are assumed to be available at therelative path s5/default (for S5), slideous (for Slideous), reveal.js (for reveal.js), or at the
Slidy website at w3.org (for Slidy). (These paths can be changed by setting the slidy-url,slideous-url, revealjs-url, or s5-url variables; see Variables for HTML slides, above.)
For DZSlides, the (relatively short) JavaScript and CSS are included in the file by default.
With all HTML slide formats, the --self-contained option can be used to produce a single
file that contains all of the data necessary to display the slide show, including linked scripts,
stylesheets, images, and videos.
To produce a PDF slide show using beamer, type
pandoc -t beamer habits.txt -o habits.pdf

Note that a reveal.js slide show can also be converted to a PDF by printing it to a file fromthe browser.
To produce a PowerPoint slide show, type
pandoc habits.txt -o habits.pptx

Structuring the slide show
By default, the slide level is the highest heading level in the hierarchy that is followed immediately by content, and not another heading, somewhere in the document. In the example
above, level-1 headings are always followed by level-2 headings, which are followed bycontent, so the slide level is 2. This default can be overridden using the --slide-level
option.
The document is carved up into slides according to the following rules:• A horizontal rule always starts a new slide.
• A heading at the slide level always starts a new slide.

124

Structuring the slide show
• Headings below the slide level in the hierarchy create headings within a slide.
(In beamer, a “block” will be created. If the heading has the class example, an
exampleblock environment will be used; if it has the class alert, an alertblock will
be used; otherwise a regular block will be used.)• Headings above the slide level in the hierarchy create “title slides,” which just containthe section title and help to break the slide show into sections. Non-slide content
under these headings will be included on the title slide (for HTML slide shows) or ina subsequent slide with the same title (for beamer).
• A title page is constructed automatically from the document’s title block, if present. (Inthe case of beamer, this can be disabled by commenting out some lines in the default
template.)
These rules are designed to support many different styles of slide show. If you don’tcare about structuring your slides into sections and subsections, you can either just use
level-1 headings for all slides (in that case, level 1 will be the slide level) or you can set--slide-level=0.
Note: in reveal.js slide shows, if slide level is 2, a two-dimensional layout will be produced,
with level-1 headings building horizontally and level-2 headings building vertically. It
is not recommended that you use deeper nesting of section levels with reveal.js unless
you set --slide-level=0 (which lets reveal.js produce a one-dimensional layout and onlyinterprets horizontal rules as slide boundaries).

PowerPoint layout choice

When creating slides, the pptx writer chooses from a number of pre-defined layouts, basedon the content of the slide:
Title Slide This layout is used for the initial slide, which is generated and filled from themetadata fields date, author, and title, if they are present.
Section Header This layout is used for what pandoc calls “title slides”, i.e. slides whichstart with a header which is above the slide level in the hierarchy.
Two Content This layout is used for two-column slides, i.e. slides containing a div withclass columns which contains at least two divs with class column.
Comparison This layout is used instead of “Two Content” for any two-column slides inwhich at least one column contains text followed by non-text (e.g. an image or a table).
Content with Caption This layout is used for any non-two-column slides which contain text
followed by non-text (e.g. an image or a table).
Blank This layout is used for any slides which only contain blank content, e.g. a slide
containing only speaker notes, or a slide containing only a non-breaking space.
Title and Content This layout is used for all slides which do not match the criteria for anotherlayout.

125

Slide shows
These layouts are chosen from the default pptx reference doc included with pandoc, unlessan alternative reference doc is specified using --reference-doc.

Incremental lists
By default, these writers produce lists that display “all at once.” If you want your lists todisplay incrementally (one item at a time), use the -i option. If you want a particular list to
depart from the default, put it in a div block with class incremental or nonincremental. So,for example, using the fenced div syntax, the following would be incremental regardlessof the document default:::: incremental- Eat spaghetti- Drink wine:::or::: nonincremental- Eat spaghetti- Drink wine:::

While using incremental and nonincremental divs is the recommended method of setting
incremental lists on a per-case basis, an older method is also supported: putting lists inside
a blockquote will depart from the document default (that is, it will display incrementally
without the -i option and all at once with the -i option):> - Eat spaghetti> - Drink wine

Both methods allow incremental and nonincremental lists to be mixed in a single document.
If you want to include a block-quoted list, you can work around this behavior by putting
the list inside a fenced div, so that it is not the direct child of the block quote:126

Inserting pauses> ::: wrapper> - a> - list in a quote> :::Inserting pauses
You can add “pauses” within a slide by including a paragraph containing three dots,
separated by spaces:# Slide with a pause
content before the pause. . .
content after the pause

Note: this feature is not yet implemented for PowerPoint output.

Styling the slides
You can change the style of HTML slides by putting customized CSS files in$DATADIR/s5/default (for S5), $DATADIR/slidy (for Slidy), or $DATADIR/slideous(for Slideous), where $DATADIR is the user data directory (see --data-dir, above). The
originals may be found in pandoc’s system data directory (generally $CABALDIR/pandocVERSION/s5/default). Pandoc will look there for any files it does not find in the user data
directory.
For dzslides, the CSS is included in the HTML file itself, and may be modified there.
All reveal.js configuration options can be set through variables. For example, themes can beused by setting the theme variable:-V theme=moon

Or you can specify a custom stylesheet using the --css option.
To style beamer slides, you can specify a theme, colortheme, fonttheme, innertheme, andoutertheme, using the -V option:
pandoc -t beamer habits.txt -V theme:Warsaw -o habits.pdf

127

Slide shows
Note that heading attributes will turn into slide attributes (on a <div> or <section>) in
HTML slide formats, allowing you to style individual slides. In beamer, a number of headingclasses and attributes are recognized as frame options and will be passed through as options
to the frame: see Frame attributes in beamer, below.

Speaker notes
Speaker notes are supported in reveal.js, PowerPoint (pptx), and beamer output. You can
add notes to your Markdown document thus:::: notes
This is my note.
- It can contain Markdown- like this list:::

To show the notes window in reveal.js, press s while viewing the presentation. Speakernotes in PowerPoint will be available, as usual, in handouts and presenter view.
Notes are not yet supported for other slide formats, but the notes will not appear on theslides themselves.

Columns
To put material in side by side columns, you can use a native div container with classcolumns, containing two or more div containers with class column and a width attribute::::::::::::::: {.columns}::: {.column width="40%"}
contents...
:::::: {.column width="60%"}
contents...
:::::::::::::::::

Note: Specifying column widths does not currently work for PowerPoint.

128

Frame attributes in beamer
Additional columns attributes in beamer

The div containers with classes columns and column can optionally have an align attribute.
The class columns can optionally have a totalwidth attribute or an onlytextwidth class.

:::::::::::::: {.columns align=center totalwidth=8em}::: {.column width="40%"}
contents...
:::::: {.column width="60%" align=bottom}
contents...
:::::::::::::::::

The align attributes on columns and column can be used with the values top, top-baseline,
center and bottom to vertically align the columns. It defaults to top in columns.
The totalwidth attribute limits the width of the columns to the given value.

:::::::::::::: {.columns align=top .onlytextwidth}::: {.column width="40%" align=center}
contents...
:::::: {.column width="60%"}
contents...
:::::::::::::::::

The class onlytextwidth sets the totalwidth to \textwidth.
See Section 12.7 of the Beamer User’s Guide for more details.

Frame attributes in beamer
Sometimes it is necessary to add the LaTeX [fragile] option to a frame in beamer (forexample, when using the minted environment). This can be forced by adding the fragile
class to the heading introducing the slide:# Fragile slide {.fragile}129

Slide showsAll of the other frame attributes described in Section 8.1 of the Beamer User’s Guide may also
be used: allowdisplaybreaks, allowframebreaks, b, c, s, t, environment, label, plain,
shrink, standout, noframenumbering, squeeze. allowframebreaks is recommended especially for bibliographies, as it allows multiple slides to be created if the content overfills theframe:# References {.allowframebreaks}

In addition, the frameoptions attribute may be used to pass arbitrary frame options to abeamer slide:# Heading {frameoptions="squeeze,shrink,customoption=foobar"}

Background in reveal.js, beamer, and pptx
Background images can be added to self-contained reveal.js slide shows, beamer slide
shows, and pptx slide shows.

On all slides (beamer, reveal.js, pptx)

With beamer and reveal.js, the configuration option background-image can be used either
in the YAML metadata block or as a command-line variable to get the same image on every
slide.
Note that for reveal.js, the background-image will be used as a parallaxBackgroundImage(see below).
For pptx, you can use a --reference-doc in which background images have been set on
the relevant layouts.

parallaxBackgroundImage (reveal.js)

For reveal.js, there is also the reveal.js-native option parallaxBackgroundImage, which
produces a parallax scrolling background. You must also set parallaxBackgroundSize,and can optionally set parallaxBackgroundHorizontal and parallaxBackgroundVerticalto configure the scrolling behaviour. See the reveal.js documentation for more details about
the meaning of these options.
In reveal.js’s overview mode, the parallaxBackgroundImage will show up only on the firstslide.

130

Background in reveal.js, beamer, and pptx
On individual slides (reveal.js, pptx)

To set an image for a particular reveal.js or pptx slide, add {background-image="/path/to/image"}to the first slide-level heading on the slide (which may even be empty).
As the HTML writers pass unknown attributes through, other reveal.js background settings also work on individual slides, including background-size, background-repeat,background-color, transition, and transition-speed. (The data- prefix will automatically be added.)
Note: data-background-image is also supported in pptx for consistency with reveal.js – ifbackground-image isn’t found, data-background-image will be checked.

On the title slide (reveal.js, pptx)

To add a background image to the automatically generated title slide for reveal.js, use thetitle-slide-attributes variable in the YAML metadata block. It must contain a map of
attribute names and values. (Note that the data- prefix is required here, as it isn’t added
automatically.)
For pptx, pass a --reference-doc with the background image set on the “Title Slide”
layout.

Example (reveal.js)--title: My Slide Show
parallaxBackgroundImage: /path/to/my/background_image.png
title-slide-attributes:
data-background-image: /path/to/title_image.png
data-background-size: contain--## Slide One
Slide 1 has background_image.png as its background.
## {background-image="/path/to/special_image.jpg"}
Slide 2 has a special image for its background, even though the heading has no content.

131

EPUBs
EPUB Metadata
EPUB metadata may be specified using the --epub-metadata option, but if the source
document is Markdown, it is better to use a YAML metadata block. Here is an example:--title:- type: main
text: My Book- type: subtitle
text: An investigation of metadata
creator:- role: author
text: John Smith- role: editor
text: Sarah Jones
identifier:- scheme: DOI
text: doi:10.234234.234/33
publisher:

My Pressrights: © 2007 John Smith, CC BY-NC
ibooks:version: 1.3.4...

The following fields are recognized:
identifier Either a string value or an object with fields text and scheme. Valid values

for scheme are ISBN-10, GTIN-13, UPC, ISMN-10, DOI, LCCN, GTIN-14, ISBN-13, Legaldeposit number, URN, OCLC, ISMN-13, ISBN-A, JP, OLCC.
title Either a string value, or an object with fields file-as and type, or a list of such objects.

Valid values for type are main, subtitle, short, collection, edition, extended.

133

EPUBscreator Either a string value, or an object with fields role, file-as, and text, or a list ofsuch objects. Valid values for role are MARC relators, but pandoc will attempt totranslate the human-readable versions (like “author” and “editor”) to the appropriate
marc relators.
contributor Same format as creator.
date A string value in YYYY-MM-DD format. (Only the year is necessary.) Pandoc will attempt

to convert other common date formats.
lang (or legacy: language) A string value in BCP 47 format. Pandoc will default to the local

language if nothing is specified.
subject Either a string value, or an object with fields text, authority, and term, or alist of such objects. Valid values for authority are either a reserved authority value(currently AAT, BIC, BISAC, CLC, DDC, CLIL, EuroVoc, MEDTOP, LCSH, NDC, Thema, UDC, and
WGS) or an absolute IRI identifying a custom scheme. Valid values for term are definedby the scheme.
description A string value.
type A string value.
format A string value.
relation A string value.
coverage A string value.
rights A string value.
belongs-to-collection A string value. Identifies the name of a collection to which the

EPUB Publication belongs.
group-position The group-position field indicates the numeric position in which the

EPUB Publication belongs relative to other works belonging to the same belongs-tocollection field.
cover-image A string value (path to cover image).
css (or legacy: stylesheet) A string value (path to CSS stylesheet).
page-progression-direction Either ltr or rtl.

Specifies the page-progression-

direction attribute for the spine element.
accessModes An array of strings (schema). Defaults to ["textual"].
accessModeSufficient An array of strings (schema). Defaults to ["textual"].
accessibilityHazards An array of strings (schema). Defaults to ["none"].
accessibilityFeatures An array of strings (schema). Defaults to134

The epub:type attribute- "alternativeText"- "readingOrder"- "structuralNavigation"- "tableOfContents"
accessibilitySummary A string value.
ibooks iBooks-specific metadata, with the following fields:• version: (string)• specified-fonts: true|false (default false)• ipad-orientation-lock: portrait-only|landscape-only• iphone-orientation-lock: portrait-only|landscape-only• binding: true|false (default true)• scroll-axis: vertical|horizontal|default

The epub:type attribute
For epub3 output, you can mark up the heading that corresponds to an EPUB chapter using
the epub:type attribute. For example, to set the attribute to the value prologue, use thisMarkdown:# My chapter {epub:type=prologue}

Which will result in:<body epub:type="frontmatter"><section epub:type="prologue"><h1>My chapter</h1>

Pandoc will output <body epub:type="bodymatter">, unless you use one of the following
values, in which case either frontmatter or backmatter will be output.
epub:type of first section

epub:type of bodyprologue
abstract
acknowledgments
copyright-page
dedicationcredits
keywords
imprint

frontmatter
frontmatter
frontmatter
frontmatter
frontmatter
frontmatter
frontmatter
frontmatter

135

EPUBsepub:type of first section

epub:type of bodycontributors
other-credits
erratarevision-history
titlepagehalftitlepage
seriespage
foreword
prefacefrontispiece
appendix
colophonbibliography
index

frontmatter
frontmatter
frontmatter
frontmatter
frontmatter
frontmatter
frontmatter
frontmatter
frontmatter
frontmatterbackmatterbackmatterbackmatterbackmatter

Linked media
By default, pandoc will download media referenced from any <img>, <audio>, <video> or<source> element present in the generated EPUB, and include it in the EPUB container,
yielding a completely self-contained EPUB. If you want to link to external media resources
instead, use raw HTML in your source and add data-external="1" to the tag with the src
attribute. For example:<audio controls="1"><source src="https://example.com/music/toccata.mp3"
data-external="1" type="audio/mpeg"></source></audio>

If the input format already is HTML then data-external="1" will work as expected
for <img> elements. Similarly, for Markdown, external images can be declared with![img](url){external=1}. Note that this only works for images; the other media elements
have no native representation in pandoc’s AST and require the use of raw HTML.

EPUB styling
By default, pandoc will include some basic styling contained in its epub.css data file. (Tosee this, use pandoc --print-default-data-file epub.css.) To use a different CSS file,136

EPUB styling
just use the --css command line option. A few inline styles are defined in addition; theseare essential for correct formatting of pandoc’s HTML output.
The document-css variable may be set if the more opinionated styling of pandoc’s default
HTML templates is desired (and in that case the variables defined in Variables for HTMLmay be used to fine-tune the style).

137

Chunked HTMLpandoc -t chunkedhtml will produce a zip archive of linked HTML files, one for eachsection of the original document. Internal links will automatically be adjusted to point to
the right place, images linked to under the working directory will be incorporated, andnavigation links will be added. In addition, a JSON file sitemap.json will be included
describing the hierarchical structure of the files.
If an output file without an extension is specified, then it will be interpreted as a directory
and the zip archive will be automatically unpacked into it (unless it already exists, in whichcase an error will be raised). Otherwise a .zip file will be produced.
The navigation links can be customized by adjusting the template. By default, a table ofcontents is included only on the top page. To include it on every page, set the toc variable
manually.

139Jupyter notebooks
When creating a Jupyter notebook, pandoc will try to infer the notebook structure. Codeblocks with the class code will be taken as code cells, and intervening content will be taken
as Markdown cells. Attachments will automatically be created for images in Markdown
cells. Metadata will be taken from the jupyter metadata field. For example:--title: My notebook
jupyter:nbformat: 4nbformat_minor: 5kernelspec:
display_name: Python 2
language: python
name: python2
language_info:
codemirror_mode:
name: ipython
version: 2
file_extension: ".py"
mimetype: "text/x-python"
name: "python"
nbconvert_exporter: "python"pygments_lexer: "ipython2"
version: "2.7.15"--# Lorem ipsum**Lorem ipsum** dolor sit amet, consectetur adipiscing elit. Nunc luctus
bibendum felis dictum sodales.
``` code
print("hello")
```

141

Jupyter notebooks## Pyout``` codefrom IPython.display import HTML
HTML("""<script>
console.log("hello");</script><b>HTML</b>""")```## ImageThis image ![image](myimage.png) will be
included as a cell attachment.

If you want to add cell attributes, group cells differently, or add output to code cells, then
you need to include divs to indicate the structure. You can use either fenced divs or native
divs for this. Here is an example::::::: {.cell .markdown}# Lorem**Lorem ipsum** dolor sit amet, consectetur adipiscing elit. Nunc luctus
bibendum felis dictum sodales.
:::::::::::: {.cell .code execution_count=1}``` {.python}
print("hello")```::: {.output .stream .stdout}
```
hello
```
:::
:::::::::::: {.cell .code execution_count=2}``` {.python}from IPython.display import HTML142

HTML("""<script>
console.log("hello");</script><b>HTML</b>""")```::: {.output .execute_result execution_count=2}```{=html}<script>
console.log("hello");</script><b>HTML</b>
hello
```
:::
::::::

If you include raw HTML or TeX in an output cell, use the raw attribute, as shown in
the last cell of the example above. Although pandoc can process “bare” raw HTML and
TeX, the result is often interspersed raw elements and normal textual elements, and in an
output cell pandoc expects a single, connected raw block. To avoid using raw HTML or
TeX except when marked explicitly using raw attributes, we recommend specifying theextensions -raw_html-raw_tex+raw_attribute when translating between Markdown andipynb notebooks.
Note that options and extensions that affect reading and writing of Markdown will also
affect Markdown cells in ipynb notebooks. For example, --wrap=preserve will preserve
soft line breaks in Markdown cells; --markdown-headings=setext will cause Setext-styleheadings to be used; and --preserve-tabs will prevent tabs from being turned to spaces.

143Syntax highlighting
Pandoc will automatically highlight syntax in fenced code blocks that are marked witha language name. The Haskell library skylighting is used for highlighting. Currently
highlighting is supported only for HTML, EPUB, Docx, Ms, Man, and LaTeX/PDF output.
To see a list of language names that pandoc will recognize, type pandoc --list-highlightlanguages.
The color scheme can be selected using the --highlight-style option. The default color
scheme is pygments, which imitates the default color scheme used by the Python library
pygments (though pygments is not actually used to do the highlighting). To see a list ofhighlight styles, type pandoc --list-highlight-styles.
If you are not satisfied with the predefined styles, you can use --print-highlight-style
to generate a JSON .theme file which can be modified and used as the argument to -highlight-style. To get a JSON version of the pygments style, for example:
pandoc --print-highlight-style pygments > my.theme

Then edit my.theme and use it like this:pandoc --highlight-style my.theme

If you are not satisfied with the built-in highlighting, or you want to highlight a languagethat isn’t supported, you can use the --syntax-definition option to load a KDE-style XML
syntax definition file. Before writing your own, have a look at KDE’s repository of syntax
definitions.
To disable highlighting, use the --no-highlight option.

145

Custom Styles
Custom styles can be used in the docx, odt and ICML formats.

OutputBy default, pandoc’s odt, docx and ICML output applies a predefined set of styles for blocks
such as paragraphs and block quotes, and uses largely default formatting (italics, bold)for inlines. This will work for most purposes, especially alongside a reference doc file.
However, if you need to apply your own styles to blocks, or match a preexisting set ofstyles, pandoc allows you to define custom styles for blocks and text using divs and spans,
respectively.
If you define a div or span with the attribute custom-style, pandoc will apply your specified
style to the contained elements (with the exception of elements whose function depends
on a style, like headings, code blocks, block quotes, or links). So, for example, using thebracketed_spans syntax,[Get out]{custom-style="Emphatically"}, he said.

would produce a file with “Get out” styled with character style Emphatically. Similarly,
using the fenced_divs syntax,
Dickinson starts the poem simply:::: {custom-style="Poetry"}| A Bird came down the Walk--| He did not know I saw--:::

would style the two contained lines with the Poetry paragraph style.
Styles will be defined in the output file as inheriting from normal text (docx) or Default
Paragraph Style (odt), if the styles are not yet in your reference doc. If they are alreadydefined, pandoc will not alter the definition.

147

Custom Styles
This feature allows for greatest customization in conjunction with pandoc filters. If you
want all paragraphs after block quotes to be indented, you can write a filter to apply thestyles necessary. If you want all italics to be transformed to the Emphasis character style(perhaps to change their color), you can write a filter which will transform all italicizedinlines to inlines within an Emphasis custom-style span.
For docx or odt output, you don’t need to enable any extensions for custom styles to work.

Input
The docx reader, by default, only reads those styles that it can convert into pandoc elements,
either by direct conversion or interpreting the derivation of the input document’s styles.
By enabling the styles extension in the docx reader (-f docx+styles), you can produce
output that maintains the styles of the input document, using the custom-style class.
Paragraph styles are interpreted as divs, while character styles are interpreted as spans.
For example, using the custom-style-reference.docx file in the test directory, we havethe following different outputs:
Without the +styles extension:$ pandoc test/docx/custom-style-reference.docx -f docx -t markdown
This is some text.
This is text with an *emphasized* text style. And this is text with a**strengthened** text style.
> Here is a styled paragraph that inherits from Block Text.

And with the extension:$ pandoc test/docx/custom-style-reference.docx -f docx+styles -t markdown::: {custom-style="First Paragraph"}This is some text.
:::::: {custom-style="Body Text"}
This is text with an [emphasized]{custom-style="Emphatic"} text style.
And this is text with a [strengthened]{custom-style="Strengthened"}text style.
:::

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Input::: {custom-style="My Block Style"}> Here is a styled paragraph that inherits from Block Text.
:::

With these custom styles, you can use your input document as a reference-doc while creating
docx output (see below), and maintain the same styles in your input and output files.

149Custom readers and writers
Pandoc can be extended with custom readers and writers written in Lua. (Pandoc includesa Lua interpreter, so Lua need not be installed separately.)
To use a custom reader or writer, simply specify the path to the Lua script in place of the
input or output format. For example:
pandoc -t data/sample.lua
pandoc -f my_custom_markup_language.lua -t latex -s

If the script is not found relative to the working directory, it will be sought in the custom
subdirectory of the user data directory (see --data-dir).
A custom reader is a Lua script that defines one function, Reader, which takes a string as
input and returns a Pandoc AST. See the Lua filters documentation for documentation of
the functions that are available for creating pandoc AST elements. For parsing, the lpeg
parsing library is available by default. To see a sample custom reader:
pandoc --print-default-data-file creole.lua

If you want your custom reader to have access to reader options (e.g. the tab stop setting),
you give your Reader function a second options parameter.
A custom writer is a Lua script that defines a function that specifies how to render eachelement in a Pandoc AST. See the djot-writer.lua for a full-featured example.
Note that custom writers have no default template. If you want to use --standalone with acustom writer, you will need to specify a template manually using --template or add a newdefault template with the name default.NAME_OF_CUSTOM_WRITER.lua to the templates
subdirectory of your user data directory (see Templates).

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Reproducible builds
Some of the document formats pandoc targets (such as EPUB, docx, and ODT) include build
timestamps in the generated document. That means that the files generated on successivebuilds will differ, even if the source does not. To avoid this, set the SOURCE_DATE_EPOCH
environment variable, and the timestamp will be taken from it instead of the current time.
SOURCE_DATE_EPOCH should contain an integer unix timestamp (specifying the number of
seconds since midnight UTC January 1, 1970).
Some document formats also include a unique identifier. For EPUB, this can be set explicitly
by setting the identifier metadata field (see EPUB Metadata, above).

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Accessible PDFs and PDF archiving standards
PDF is a flexible format, and using PDF in certain contexts requires additional conventions.
For example, PDFs are not accessible by default; they define how characters are placed ona page but do not contain semantic information on the content. However, it is possible togenerate accessible PDFs, which use tagging to add semantic information to the document.
Pandoc defaults to LaTeX to generate PDF. Tagging support in LaTeX is in development
and not readily available, so PDFs generated in this way will always be untagged and notaccessible. This means that alternative engines must be used to generate accessible PDFs.
The PDF standards PDF/A and PDF/UA define further restrictions intended to optimize
PDFs for archiving and accessibility. Tagging is commonly used in combination with thesestandards to ensure best results.
Note, however, that standard compliance depends on many things, including the colorspaceof embedded images. Pandoc cannot check this, and external programs must be used toensure that generated PDFs are in compliance.

ConTeXt
ConTeXt always produces tagged PDFs, but the quality depends on the input. The default
ConTeXt markup generated by pandoc is optimized for readability and reuse, not tagging.
Enable the tagging format extension to force markup that is optimized for tagging. Thiscan be combined with the pdfa variable to generate standard-compliant PDFs. E.g.:
pandoc --to=context+tagging -V pdfa=3a

A recent context version should be used, as older versions contained a bug that lead toinvalid PDF metadata.

WeasyPrint
The HTML-based engine WeasyPrint includes experimental support for PDF/A and
PDF/UA since version 57. Tagged PDFs can created with155

Accessible PDFs and PDF archiving standards
pandoc --pdf-engine=weasyprint \--pdf-engine-opt=--pdf-variant=pdf/ua-1 ...

The feature is experimental and standard compliance should not be assumed.

Prince XML
The non-free HTML-to-PDf converter prince has extensive support for various PDF standards as well as tagging. E.g.:
pandoc --pdf-engine=prince \--pdf-engine-opt=--tagged-pdf ...

See the prince documentation for more info.

Word Processors
Word processors like LibreOffice and MS Word can also be used to generate standardized
and tagged PDF output. Pandoc does not support direct conversions via these tools. However, pandoc can convert a document to a docx or odt file, which can then be opened andconverted to PDF with the respective word processor. See the documentation for Word andLibreOffice.

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Running pandoc as a web server
If you rename (or symlink) the pandoc executable to pandoc-server, or if you call pandoc
with server as the first argument, it will start up a web server with a JSON API. This server
exposes most of the conversion functionality of pandoc. For full documentation, see thepandoc-server man page.
If you rename (or symlink) the pandoc executable to pandoc-server.cgi, it will function
as a CGI program exposing the same API as pandoc-server.
pandoc-server is designed to be maximally secure; it uses Haskell’s type system to provide

strong guarantees that no I/O will be performed on the server during pandoc conversions.

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Running pandoc as a Lua interpreter
Calling the pandoc executable under the name pandoc-lua or with lua as the first argument
will make it function as a standalone Lua interpreter. The behavior is mostly identical to thatof the standalone lua executable, version 5.4. For full documentation, see the pandoc-lua
man page.

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A note on security
1. Although pandoc itself will not create or modify any files other than those you explicitly ask it create (with the exception of temporary files used in producing PDFs),a filter or custom writer could in principle do anything on your file system. Pleaseaudit filters and custom writers very carefully before using them.
2. Several input formats (including HTML, Org, and RST) support include directives
that allow the contents of a file to be included in the output. An untrusted attacker
could use these to view the contents of files on the file system. (Using the --sandbox
option can protect against this threat.)
3. Several output formats (including RTF, FB2, HTML with --self-contained, EPUB,
Docx, and ODT) will embed encoded or raw images into the output file. An untrusted
attacker could exploit this to view the contents of non-image files on the file system.
(Using the --sandbox option can protect against this threat, but will also prevent
including images in these formats.)
4. If your application uses pandoc as a Haskell library (rather than shelling out to the
executable), it is possible to use it in a mode that fully isolates pandoc from yourfile system, by running the pandoc operations in the PandocPure monad. See thedocument Using the pandoc API for more details. (This corresponds to the use of the--sandbox option on the command line.)
5. Pandoc’s parsers can exhibit pathological performance on some corner cases. It is
wise to put any pandoc operations under a timeout, to avoid DOS attacks that exploit
these issues. If you are using the pandoc executable, you can add the command line
options +RTS -M512M -RTS (for example) to limit the heap size to 512MB. Note thatthe commonmark parser (including commonmark_x and gfm) is much less vulnerable
to pathological performance than the markdown parser, so it is a better choice whenprocessing untrusted input.
6. The HTML generated by pandoc is not guaranteed to be safe. If raw_html is enabled
for the Markdown input, users can inject arbitrary HTML. Even if raw_html is disabled,users can include dangerous content in URLs and attributes. To be safe, you should
run all HTML generated from untrusted user input through an HTML sanitizer.

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Authors
Copyright 2006–2024 John MacFarlane (jgm@berkeley.edu). Released under the GPL, version 2 or greater. This software carries no warranty of any kind. (See COPYRIGHT for full
copyright and warranty notices.) For a full list of contributors, see the file AUTHORS.md in
the pandoc source code.

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