We tackled this question and then some at the January Central Texas DITA User Group meeting. Sides are available on Slideshare here:

http://www.slideshare.net/annegentle/what-does-dita-have-to-do-with-wiki

http://www.slideshare.net/almondjoy/redbooks-wiki-central-texas-dita-ug-presentation 

Wikipedia,  the free encyclopedia, describes DITA as "an XML-based architecture for authoring, producing, and delivering technical information. The architecture and a related DTD and a W3C-Schema was developed by IBM ... Unlike book-oriented approaches that are based on chapters and pages, DITA uses topics - small chunks of information that can be easily reused across various contexts and deliverables. DITA also has built-in extensibility support, meaning you can customize document type definitions (or DTDs) without breaking compatibility with existing applications and processes.

These files are in DITA 1.1.
The files are released under an OSI Common Public License (http://www.opensource.org/licenses/cpl1.0.php), which provides a non-exclusive, worldwide, royalty-free copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, distribute and sublicense the work or derivative works, in source code and object code form. If you want to provide attribution, the document was originally contributed by Heather Wymer, Swinburne University of Technology.

DITA is both a markup language and architecture for defining new markup languages, or creating DITA-compatible flavours of existing languages. Can DITA be specialized to support the S1000D standard, enabling standardized content reuse, integration, and publishing with S1000D-compatible content in a DITA-compliant toolset? If it can, then a strong reuse and integration relationship would become possible between the two standards, with sharable infrastructure, content, and publishing streams. 

DITA’s capabilities are being put to the test with a wide range of adoption contexts with very different requirements. Can it scale from small shops to industry consortia? Can it adapt to new audiences, new content types, new development methodologies?

This zip file contains a DITAmap and multiple topics.

A new yahoo group that specializes in Justsystems XMetaL.