XML and SGML Document Type Definitions (DTDs) for for DocBook
Description
DocBook is an XML/SGML vocabulary particularly well suited to
books and papers about computer hardware and software
(though it is by no means limited to these applications).
The DocBook Technical Committee maintains the DocBook schema.
DocBook are available as Document Type Definitions (DTDs) for both XML and SGML,
and also RELAX NG and W3C XML Schema.
