The Dojo plugin will be deprecated on Struts 2.1
The easiest way to get documentation for Struts 2.0 Dojo tag usage is to look at older Struts 2 documentation, like the Struts 2.0.11 Ajax tags wiki documentation.
Please check that documentation and the Dojo tag examples in the showcase app of the appropriate Struts 2 version before asking questions on the struts-user mailing list!
THE WIKI IS NOT VERSIONABLE (in a practical way).
The documentation here is for the most current Struts 2, not necessarily the most current release. We try to add version-specific documentation notes but have undoubtedly missed some locations.