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decentralized-identity / credential-trust-establishment

a sub-work item of the Trust Establishment work item at the Claims & Creds WG at DIF
https://identity.foundation/credential-trust-establishment
Apache License 2.0
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references to schemas with different credential technologies. #33

Open TelegramSam opened 7 months ago

TelegramSam commented 7 months ago

ld creds:

sd-jwt creds:

w3c data model: https://www.w3.org/TR/vc-data-model/#types

The value of the type property MUST be, or map to (through interpretation of the @context property), one or more URIs.

the schema URI most be the URI that is or is mapped to via the @context properties

Note, the inclusion of VerifiableCredential (https://www.w3.org/2018/credentials#VerifiableCredential) is necessary for all credentials, and is not the relevant schema we are linking to. The PermanentResident is the schema in question.

Examples: https://www.w3.org/2018/credentials#VerifiableCredential, https://w3id.org/citizenship#PermanentResident

Openbadges https://purl.imsglobal.org/spec/vc/ob/vocab.html#OpenBadgeCredential https://example.com/examples#KELICourseCredential

CredentialSubject > Type contains the type we care about for open badges, which appears different than use in normal VCs.

Do we instead use external definitions like Presentation Defintion, since they are more straigtforward?

TelegramSam commented 6 months ago

AnonCreds - URI, solved SD-JWT - Unknown LD-based credentials (anything that uses @context - Use context values other than the VC Datamodel URI?

TelegramSam commented 6 months ago

https://www.w3.org/TR/vc-data-model-2.0/#types for w3c data models. is URI or resolves to a URI via LD @context expansion. it appears that credentials may contain multiple sub types. should all types be recognized?

Two options for declaring an issuer as 'authorized': all types and contexts, or must ignore sections that don't include relevant types.

TelegramSam commented 6 months ago

examples of contexts used for verification:

[ "https://www.w3.org/2018/credentials#VerifiableCredential", // "https://w3id.org/citizenship#PermanentResident" "https://purl.imsglobal.org/spec/vc/ob/vocab.html#OpenBadgeCredential" // "https://contexts-file-hosting.glitch.me/data.jsonld#KELICourseCredential" // "https://example.com/indicio#courseCompletion" // "https://example.com/indicio#KELICourseCredential" // "https://example.com/examples#CustomContext", // "https://example.com/examples#KELICourseCredential" ],