One drop of a strong solution of ordinary sugar is applied to the sheet, the excess being blotted after one minute. A drop of concentrated sulfuric acid is then applied, which turns the area treated a bright red color if rosin is present in the paper. Skipping headings levels. Since headings are intended to designate successive subdivisions of a section of text, it rarely makes sense to skip heading levels, and usually indicates that the author is trying to achieve a typographic effect rather than indicate the structure of the document. While case is not significant in element names, it is significant in entity references .
Presentation is the purview of the user, content of the author.
These are often artifacts of a word processor's overzealous word-wrapping.