igrantio-credential-schema-diplomalisted

# National Diploma - credential schema ## When to use Use this skill when the ministry, or a national learner registry, issues a **diploma** as a verifiable credential to a learner. The diploma is the qualification evidence a graduate later shares with an employer. It is issued in the same wallet session as the diploma-fee payment (a dynamic credential request), so the credential definition sets `supportInteractiveAuthorisationEndpoint: true`. This is a **use-case credential**, not a public verifiable-data-registry type. The showcase defines it with the type `urn:education:diploma:1` in the `dc+sd-jwt` format. It models the W3C VC 2.0 / Open Badges education fields semantically, carried as an OWS `dc+sd-jwt` credential so the holder can selectively disclose each field. ## Prerequisites - An **iGrant.io Organisation Wallet Suite (OWS) API key** for the issuing organisation. Keep it on the server, in an environment variable or a secret manager. The browser never sees it. - The **OWS environment** the key belongs to. The default is **demo** (`https://demo-api.igrant.io`). Use **staging** (`https://staging-api.igrant.io`) only when the integrator asks for it. - An **x509 signing key** whose certificate is registered on a trust list (the showcase uses NXD Pub-EAA). Until it is, wallets show the credential as unverified. See <https://docs.igrant.io/docs/trust-relying-party-registration/>. ## Ask the integrator first Ask one question at a time, with a recommended def