clientIdScheme

OID4VP: OPTIONAL. A string identifying the scheme of the value in the client_id Authorization Request parameter (Client Identifier scheme). The clientIdScheme parameter namespaces the respective Client Identifier. If an Authorization Request uses the clientIdScheme parameter, the Wallet MUST interpret the Client Identifier of the Verifier in the context of the Client Identifier scheme. If the parameter is not present, the Wallet MUST behave as specified in RFC6749. If the same Client Identifier is used with different Client Identifier schemes, those occurrences MUST be treated as different Verifiers. Note that the Verifier needs to determine which Client Identifier schemes the Wallet supports prior to sending the Authorization Request in order to choose a supported scheme.