The <index-base> element allows indexing extensions to be added by specializing off this element. It does not in itself have any meaning and should be ignored in processing.
The <index-base> element can only exist as a child of an <indexterm> element. This characteristic makes it the appropriate element to specialize to add indexing extensions. Specifically, the index-see , index-see-also, and index-sort-as elements only make sense as children of <indexterm> and so are specializations of <index-base>. Those elements are all part of the indexing domain, which is new for DITA 1.1.
On its own, <index-base> has no meaning. Processors should ignore this element and its content if encountered in its unspecialized form.
|ditabase, topic, task, reference, concept||( text data or keyword or option or parmname or apiname or cmdname or msgnum or varname or wintitle or term or data or data-about or foreign or unknown or indexterm) (any number)|
|map, bookmap||( text data or keyword or term or data or data-about or foreign or unknown or indexterm) (any number)|
|bookmap, map, ditabase, topic, task, concept, reference, glossary||indexterm|
|Name||Description||Data Type||Default Value||Required?|
|%univ-atts; (%select-atts;, %id-atts;, %localization-atts;)||A set of related attributes, described at %univ-atts;||parameter entity||PE not applicable||Not applicable|
|%global-atts; (xtrf, xtrc)||A set of related attributes, described at %global-atts;||parameter entity||PE not applicable||Not applicable|
|class, keyref||Common attributes described in Other common DITA attributes|
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OASIS DITA Version 1.1 Language Specification -- OASIS Standard, 1 August 2007
Copyright © OASIS Open 2005, 2007. All Rights Reserved.