The DITA xNAL domain specialization defines a number of metadata
elements and attributes that are useful in representing personal/organizational
names and addresses. The metadata can be used to identify authors and content
owners. The OASIS xNAL Standard (extensible Name and Address Langauge) was
selected to represent close mappings from the DITA bookmap metadata content
model to an existing standard. xNAL is included in the Bookmap and the
LearningBookmap document types.
The MathML and equation domains provide general containers for equations (inline,
and display) and an integration with the MathML standard. The equation containers
equations separate from the data that provides the equation content, which might take
including MathML markup, images, and non-XML formats like TeX and ASCII equations.
The release management domain provides markup that enables content
developers to log information about changes that have been made to a DITA topic
or map. This information can be used to generate release notes, which can help
users locate significant changes in revisions of large documents.