/* begin *

   docbook-xml 4.5 (Document Type Definitions)

   DocBook V4.5 and earlier versions are officially available
   as Document Type Definitions (DTDs) for both XML and SGML.

   DocBook is general purpose XML and SGML document type
   particularly well suited to books and papers about computer
   hardware and software.

   See: https://www.docbook.org

 * end */