Certain attributes are common across most DITA elements. These attributes support
content referencing, conditional processing, application of metadata, and globalization
and
localization.
The metadata attributes specify properties of the content that can be used to
determine how the content should be processed. Specialized metadata attributes can
be defined
to enable specific business-processing needs, such as semantic processing and data
mining.
The architectural attributes specify the version of DITA that the content supports;
they
also identify the DITA domains, structural types, and specializations that
are in use by the content.