Let’s say I have 4 contacts A,B,C&D

A is both a course x mate and committee member for event 1 So tags for A are /batch20xx/course_x/ /event1/OC/

B is senior of course x and also a committee member so tags for B are /batch20xy/course_x/ /event1/OC/

C is a batch mate but on a different course y and also part of committee member and tags are /batch20xx/course_y/ /event1/OC/

D is also a batch mate and course mate but is in PR So their tags are /batch20xx/course_x/ /event1/PR/

I hope this helps.