Harold, I like the new diagram very much. I have just one comment. You say “ Formal communities can provide continuity in ordered domains but informal communities are needed to provide more flexibility in crossing expertise silos and disciplines.” However, formal communities can also be composed of people with different expertise and from different disciplines just as informal communities may be made up of people from the same domain or expertise. The difference between formal and informal is based on how the community is created (spontaneous or designated), how people join (volunteer or assigned), the type and degree of governance, and other criteria based on interactions, not on profiles, knowledge or expertise.