[Openid-specs-ab] Issue #1389: Improve metadata for vp formats (openid/connect)

[David Chadwick]

New issue 1389: Improve metadata for vp formats
https://bitbucket.org/openid/connect/issues/1389/improve-metadata-for-vp-formats

David Chadwick:

The current specification only has one parameter “vp\_formats” which is meant to specify the formats for both VCs and VPs. Thus four values for both VP and VC formats are specified. Even though the parameter is REQUIRED, nevertheless a RP can omit all VC formats and still be conformant. This is shown in the example for “an RP registering with a Standard OP via dynamic client registration”. Only the values “jwt\_vp” and “ldp\_vp” are specified for “vp\_formats”.

In order to rectify this, it is suggested that the RP has two new meta-data parameters “vp\_formats” and “vc\_formats” instead of just “vp\_formats”. Both should be REQUIRED, and two values of each should be defined \(with future ones being possible for both\). In this way a conformant RP will have to publish both the VC and VP formats that it supports.

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