Some of the attributes and metadata in a map can be inherited based on the structures in the map.
Inheritance is additive except where this would cause a conflict. When there is a conflict, the value defined closest to the topicref takes effect.
Attributes and metadata can be defined at the root level (attributes on the map element itself, topicmeta as a direct child of the map element) to apply them to the entire map. They can also be applied at any point in a hierarchy, group, or table. Tables can be particularly useful for attribute and metadata management, since they can be applied to entire columns or rows as well as individual cells.
OASIS DITA Architectural Specification v1.0 -- 09 May 2005
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