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How can policy/required claims language be conveyed from PM to AS? Couple options
Policy can also extend beyond which claim are required from the rqp. Could also define terms for how that access 'work', ie if it should only be valid for n minutes. required_claims doesn't cover this concept
What is the minimum conformance profile?
We can namespace profiles for interoperability. Ie an xacml profile that defines what goes into the required_claims field. The profile would need to present in the AS metadata, and likely have an IANA registration for well known ones. This approach is a good balance between testable interop while leaving room for extension/innovation. There would be well defined profiles for policy (xacml, some kinds of VC, "oidc"-like claims/jwts), but it's still open for custom profiles/implementation
There was previous discussion around xml/xacml that was rejected by the group. The policy language needs to be understood by both the AS and Policy Manager, such that the PM can present UX to the RO. Peter notes xacml recently had a JSON profile defined.
Should we 'try it out' and define at least one of these profile, ie to prove the concept. What minimal profile would cover 80% of cases.
AI: Alec can try to put together a JWT/OIDC like policy profile
What "things" should be present in policy? Should the draft have discussion of leave completely open?
There was the idea there are 3 elements to policy: purpose, who can access (rqp claim), what can they access (resource_type/PI category). This intersects with the Personal Data User/consent receipt specification. This response of creating policy could include a receipt_uri, or the entire receipt contents
The required_claims json object could also inherit/build on the one defined in UMA Grant Section 3.3.6 . This helps to further reduce the 'new concepts' in this draft, both resources and policy json definitions build on existing UMA json document types
SPDL Language Brief Introduction is another options for a policy language profile. It could cover more than RqP claims, and allows RO to define expiration of the access...
One question in the draft around including the RO subject, for example for a resource that doesn't identifier the RO, how does the RS get this identity/ro context? This is related to the resource definitions draft and AS-first flows.
Can the RO put information into the policy that is sent to the RS? For example if the RO isn't obvious from the resource uri, could the AS give the RS this subject/specificity. One challenge implementing UMA is that with AS/RS coordination, every resource at the RS may need to be registered. In some ways the entire rs db is represented at the AS in some way. For example, does an RS have to register a resource for each user account (ie for a userinfo or Patient resource). Or even with a non-identifiable URI, register a resource for each user PAT
As of September 3, 2020 (pre-meeting), quorum is 5 of 9. (Michael, Domenico, Peter, Sal, Gaurav, Thomas, Andi, Maciej, Eve)