[OpenID-Specs-eKYC-IDA] Issue #1320: Claim Controls (openid/ekyc-ida)

[Takahiko Kawasaki]

New issue 1320: Claim Controls
https://bitbucket.org/openid/ekyc-ida/issues/1320/claim-controls

Takahiko Kawasaki:

Hi @{5b73d0fb816d1805baacb64f} ,

Another approach for Selective Abort/Omit is to define how to control claims at a different place \(e.g. in `"claim_controls"`\) and refer it indirectly \(e.g. by `"claim_controls_applied"`\).

```json
{
  "claim_controls": {
    "control_1": {
      "conditions": [
        // Describe conditions. Grammar needs defining.
      ],
      "actions": [
        // List actions such as "abort", ["omit", ...]
      ]
    }
  },
  "id_token": {
    "verified_claims": { },
    "claim_controls_applied": [
      "control_1"
    ]
  },
  "userinfo": {
    "verified_claims": { },
    "claim_controls_applied": [
      "control_1"
    ]
  },
  "transformed_claims": {
  }
}
```

Relevant Issues and PRs:

* Issue #1276: \[SAO\] Output claim set varies depending on evaluation order
* Issue #1301: convey error response in userinfo
* PR #56: Proposal for transferring match/unavailability metadata from the OP to the RP

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