#### 2.2.3 Topic domains: Technical content

A DITA domain defines a set of elements associated with a particular subject area or authoring requirement. DITA incorporates several domains into the Technical Content specializations. Other domains are incorporated into basic DITA.

The elements in a domain are defined in a domain module which can be integrated with a topic type to make the domain elements available within the topic type structure. Currently the following domains are provided as part of the Technical Content specializations:

Table 2-4 Technical content domains

Domain | Description | Short name | Module name
Programming | For describing programming and programming languages | pr-d | programmingDomain.mod (DTD) programmingDomain.ent programmingDomain.xsd (Schema)
Software | For describing software | sw-d | softwareDomain.mod (DTD) softwareDomain.ent softwareDomain.xsd (Schema)
User interface | For describing elements in a user interface | ui-d | uiDomain.mod (DTD) uiDomain.ent uiDomain.xsd (Schema)
Hazard statements | For providing detailed information about safety hazards | hazard-d | hazardstatementDomain.mod (DTD) hazardstatementDomain.ent hazardstatementDomain.xsd (Schema)
Abbreviated form | For linking between a text reference to a glossentry topic. A specialization of <term> to provide an <abbreviated-form> element | abbrev-d | abbreviateDomain.mod (DTD) abbreviateDomain.ent abbreviateDomain.xsd (Schema)
Glossary reference | For linking from a term to its glossary topic | glossref-d | glossrefDomain.mod (DTD) glossrefDomain.ent glossrefDomain.xsd (Schema)

The technical content domain specializations, like all domain specializations, may be included in the DITA document types beyond those in the technical content section. The DITA document types in the technical content section make use of other domain specializations in addition to those listed in the table.

The elements and attributes included in specific domain specializations are described in the domain elements of the DITA 1.2 Language Reference.

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Next Topic: 2.2.4 The xNAL domain

Parent Topic: Technical content architecture

Sibling Topics:

2.2.1 Overview of the DITA 1.2 Specification: Technical Content

2.2.2 Technical content: Document and information types

2.2.4 The xNAL domain