The documentation is available is several formats. Downloadable formats including Windows Help format and offline-browsable html are available from our distribution mirrors. Online browsable documentation is also available:
Version 2.2 (Historical)
Version 2.0 (Historical)
Trunk (Development / Draft)
There is also a Documentation Wiki for user-contributed recipes, tips, and tricks.
The documentation is maintained by the documentation project. We'd love to have your help to improve the docs.