Specialization attributes group

These attributes are designed to be used by specializers, and are not intended for direct use by authors.

@specentry
The specialized entry attribute allows architects of specialized types to define a fixed or default header title for a specialized <stentry> element. Not intended for direct use by authors.
@spectitle
The specialized title attribute allows architects of specialized types to define a fixed or default title for a specialized element. Not intended for direct use by authors.