A DITA vocabulary domain defines a set of elements associated with a particular subject area or authoring requirement regardless of topic type. DITA incorporates three domains into the basic DITA content: typographic, utilities, and indexing. Other domains are incorporated into the DITA Technical Content and Learning and Training specializations.
The elements in a domain are defined in a domain module. A domain module can be integrated with a topic type to make the domain elements available within the topic type structure. The following domains are provided as part of basic DITA:
|Domain||Description||Short name||Module name|
|Typographic||For highlighting when the appropriate semantic element doesn't exist yet||hi-d||
|Utilities||For providing imagemaps and other useful structures||ut-d||
|Indexing||For extended indexing functions such as see and see-also||indexing-d||