Generating a conventional index for a document is a skilled task, and HTML+ allows authors to include directives for automatically creating hypertext indexes. These directives can be included in many HTML+ elements, such as headers, paragraphs and character emphasis using the INDEX attribute. This allows each such element to be referenced in the index under primary or secondary keys, e.g.
<h3 id="z23" index="Radiation damage/shielding from as difficult">Radiation shielding</h3>This can be used to generate an index like:
Radiation damage classical target theory dominance of in molecular mills shielding from as difficult simple lifetime model track-structure lifetime model Radicals and so on ...In many cases, a given key will be associated with more than one part of the document. In this case you can either use secondary keys to disambiguate the references, as shown above, or allow the indexing program to generate its own names for each reference, e.g. (a), (b), (c), ...
The indexing program creates an HTML+ file that can then be linked to the documents it was produced from. The program may also generate a list of references from occurrences of the CITE element. These can be simply ordered alphabetically. Sophisticated bibliographic references are beyond the scope of HTML+ as they require a much richer system of markup.
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