Index gives an index for the document. Glossary gives a glossary of terms used in the document. Copyright specifies a document with copyright information. Chapter specifies the chapter of a collection of documents. Section specifies the section of a collection of documents.
Subsection specifies a subsection of a collection of documents.
Appendix gives an appendix for the collection of documents. Help specifies a help document. Bookmark refers to a key related document. Media descriptors are case-sensitive . Script Script attribute values are client-side scripts, typically a function call or a few short statements.