Specialization rules for attributes

Darwin Information Typing Architecture (DITA) Version 1.3 Part 2: Technical Content Edition

OASIS DITA Technical Committee

There are certain rules that apply to attribute specializations.

A specialized attribute has the following characteristics:

  • It is specialized from props or base.
  • It is declared as a global attribute. Attribute specializations cannot be limited to specific element types.
  • It does not have values or value ranges that are more extensive than those of the attribute from which it was specialized.
  • Its values must be alphanumeric space-delimited values. In generalized form, the values must conform to the rules for attribute generalization.