Include, or exclude, the element in a CD-ROM volume.
Include, or exclude, the element in a printed volume.
Include, or exclude, the element in an on-line help volume.
Optional parameter whose value is used elsewhere in the document to cross-reference the element (see XREF and LINK).
ID
OpenBook applications label appendixes sequentially with letters. Specify a letter to override the one assigned. You may follow the letter with a number; for example, "A1".
NMTOKEN
Specifies the location for which the element is printed. This conditional can be used to combine two localized versions of a document (for example, an English and French version) in one document.
CDATA
Identifies if the element is an author's comment or question.
Specifies in which revision of the document an element is printed or displayed.
CDATA