Topic map

According to the definition by TopicMaps.Org Specification in XML Topic Maps (XTM) 1.0 http://www.topicmaps.org/xtm/, a topic map is either

• A collection of topics, associations[?], and scopes[?] that may exist in one of two forms:
  • a serialized interchange format (e.g. as a topic map document expressed in XTM syntax), or
  • some application-internal form, as constrained by the XTM Processing Requirements[?] defined in Annex F.

or

• The document element (<topicMap>) of a topic map document expressed using XTM syntax.