Metadata attributes
The metadata attributes express qualifications on the content. These qualifications can be used to modify the processing of the content.In general, a conditional processing attribute provides a list of one or more values separated with whitespace. For instance, audience="administrator programmer" qualifies the content as applying to administrators and programmers.Other attributes are still considered part of an element's metadata but are not designed for conditional processing, such as filtering or flagging.
Miscellaneous Attributes
DITA has several elements for supporting translation and for providing additional classification or typing of a specific element.
Architectural attributes
DITA provides some attributes to provide type information to processors instead of qualifications or properties of content.