A topic of discussion that often comes up from OCSF adopters is "When should I use/create an Extension versus when should I use/create a Profile. The Understanding OCSF document does a pretty good job of explaining the two, but I think adopters still run in to problems where they are not sure the correct approach to take under various scenarios. Perhaps we can add a few scenarios where we can outline when it is appropriate to choose a Profile and when it is appropriate to choose an Extension?