https://datatracker.ietf.org/doc/draft-ietf-calext-jscontact-uid/00/
draft-ietf-calext-jscontact-uid-00 - JSContact: Optional Unique Identifiers
This document redefines the mandatory "uid" property of a Card object to become optional. This is both for using JSContact in other protocols than CardDAV and...
unique identifiersdraftietfcalextjscontact