Peggy Holman and Tom Atlee hosted a day-long session on developing a pattern language Some documents they forwarded to participants beforehand:
Other relevant sessions
- from C2D2
Pattern languages (or collections), some/all in development, for:
Liberating Voices! - A Pattern Language for Communication Revolution (social change)
http://www.wikipatterns.com/display/wikipatterns/Wikipatterns WikiPatterns - wikis
Also see Core Dialogue Practices