The GNOME Desktop displays Help in the Yelp
Help
browser. The source documents for the Help are XML files. The XML files are
written to the DocBook XML Version 4.1.2 document type definition (DTD). The
DocBook XML files are converted to HTML, and the HTML is displayed in the
Help browser. For more information on DocBook XML, see the following URL:
http://www.oasis-open.org/docbook/xml
The Help system uses Open Source Metadata Framework (OMF) files, and a cataloging system. The next sections describe OMF files and the cataloging system.