All of the MySQL documentation is written in-house, by a team of full-time technical writers. They include:
All of the documentation is written in DocBook XML and then processed by various open-source tools, and custom in-house written utilities, into the various output formats. If you want to understand how most of these systems work, please visit the MySQL Guide to Documentation.
Some basic statistics and information about the documentation (November 2009):
For questions and suggestions to the MySQL documentation team, please use the MySQL Contact and Questions form.