Architectural specification : Architectural Specification: Base : DITA markup : DITA topics : Topic domains: Basic DITA
   
Topic domains: Basic DITA
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:
Table 1. DITA topic domains: Basic DITA
Domain
Description
Short name
Module name
Typographic
For highlighting when the appropriate semantic element doesn't exist yet
hi-d
highlightDomain.mod (DTD)
highlightDomain.xsd (Schema)
Utilities
For providing imagemaps and other useful structures
ut-d
utilitiesDomain.mod (DTD)
utilitiesDomain.xsd (Schema)
Indexing
For extended indexing functions such as see and see-also
indexing-d
indexingDomain.mod (DTD)
indexingDomain.xsd (Schema)