These definitions
are referred to as Document Type Definitions (DTDs). For documentation of Linux itself and
other open source projects, DocBook has become the DTD of choice.
Understanding DocBook
DocBook is a DTD that is well suited for producing computer software documents in a variety of
formats. It was originally created by the OASIS Consortium (www.oasis-open.org) and is now
supported by many different commercial and open source tools.
DocBook??™s focus is on marking content, instead of indicating a particular look (that is, font type,
size, position, and so on). It includes markup that lets you automate the process of creating
indexes, figure lists, and tables of contents, to name a few.
DocBook is important to the Linux and open source community because many open source projects
use it to produce documentation. For example, the following is a list of organizations that use
DocBook to create the documents that describe their software:
The Linux Documentation Project (TLDP)
www.tldp.org/LDP/LDP-Author-Guide
GNOME Documentation Project
http://developer.gnome.org/projects/gdp/handbook/gdp-handbook
KDE Documentation Project
www.kde.org/documentation
FreeBSD Documentation Project
www.freebsd.org/docproj/
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Working with Words and Images 21
If you want to contribute to any of these documentation projects, refer to the Web sites for each
organization.
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