Hi, I was trying out some scenarios. * User(s) needs to be part of Group A, B & C to have a relation X on resource Z. I was able to achieve this with something like below but is there any better way to do this ? definition resource { relation owner: user | organization permission admin = owner + owner->admin - blocked relation blocked: user | group#member relation membership1: group#member relation membership2: group#member relation membership3: group#member permission view = owner + owner->admin + (membership1 & membership2 & membership3) }