Talk:Roles and permissions

Development:Roles [[1]] shows 8 possible contexts in order of granularity. It appears that Personal and User come after System just before Course Category. I think what is needed here is a pictorial diagram similar to the Metacourses [[2]] diagram. Perhaps even a Venn-like diagram [3] for Contexts, Roles, Capabilities, Permissions, Groups. This is not an easy concept to put into words, but a picture is worth 1000 words (in English, maybe more in another language.)