n What URIs schemes should be allowed for
identifying principals?
n Limited set http(s), ldap(s)
n http(s) defined in ACL spec. – others must be
explicitly defined by an additional specification
n Or, a URL that identifies a “WebDAV” principal resource
n Anything (no constraints)
n à closest to sense ot the room Anything, but servers
SHOULD use http(s), which is a privileged scheme
that points to resources that SHOULD have additional