Language reference : Base architecture : Classification elements : Classification domain elements
   
Classification domain elements
 
subjectref
topicapply
topicsubject
topicSubjectTable
topicSubjectHeader
topicSubjectRow
topicCell
subjectCell
The classification domain elements are used to identify the subject matter of content that is referenced in a map. These subjects must be subjects defined in a subject scheme map. In particular, this allows an author to classify content in new subject categories that are not bound to existing metadata attributes.