Since the team seems to be hanging out in the comments: it appears the article was written out of order and "ReBAC" was used without the parenthetical definition in the OPA part but only defined down in the "Advantages of Google Zanzibar" section. I did what I usually do on an unusual acronym and "right-click, search" but .. that went poorly. The actual definition of "Relationship-based Access Control (ReBAC)" did show up about 4 results in, so fine, but it would be cheaper for the reader if you were to pull that upward to "define on first use"
I would pay $1 if it was clarified about how that differs from RBAC or ABAC but maybe I just haven't gone through enough blogs to already know
I would pay $1 if it was clarified about how that differs from RBAC or ABAC but maybe I just haven't gone through enough blogs to already know