DITA markup

The two main units of authoring in DITA are topics and maps. Each can be extended into new structural types and domains through specialization.

• DITA topics
  DITA topics are the basic units of DITA content. Each topic should be organized around a single subject.
• DITA maps
  Maps organize topics for output to a specific deliverable, including generating navigation files and links to related topics.
• Common metadata elements
  The same metadata elements are available in both DITA topic types and DITA map types. This allows the metadata assigned to a topic when it is created to be supplemented or overridden when the topic is included in a collection.
• Common attributes
  The following attributes are common across most DITA elements.

OASIS DITA Architectural Specification v1.0 -- 09 May 2005
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