Credential Types¶

SimpulseID defines five W3C Verifiable Credential types for identity and membership management in the ENVITED-X Data Space. All credentials are issued by ASCS e.V. as the trust anchor, deployed at identity.ascs.digital.

Each credential type extends HarbourCredential from the harbour-credentials base schema. Credential subjects carry a mandatory harbourCredential IRI linking to a Harbour Gaia-X compliance credential, which provides the baseline of trust (Gaia-X LegalPerson or NaturalPerson attestation).

The credential types and their lifecycle are specified in EVES-008. Evidence VPs follow EVES-009.

Available Types¶

Credential Type	Description	Subject ID	Schema
ParticipantCredential	Organization identity (gx:LegalPerson)	`did:ethr`	`simpulseid:ParticipantCredential`
AdministratorCredential	Elevated-permission natural person	`did:ethr`	`simpulseid:AdministratorCredential`
UserCredential	Standard natural person	`did:ethr`	`simpulseid:UserCredential`
Base Membership	ASCS e.V. base membership	`urn:uuid:`	`simpulseid:AscsBaseMembershipCredential`
ENVITED Membership	ENVITED research cluster membership	`urn:uuid:`	`simpulseid:AscsEnvitedMembershipCredential`

Issuance Order (per EVES-008 §2)¶

Credentials MUST be issued in the following order:

ParticipantCredential --- ASCS verifies the organization's legal identity
AscsBaseMembershipCredential --- requires ParticipantCredential as prerequisite
AscsEnvitedMembershipCredential (optional) --- requires BaseMembership as prerequisite
AdministratorCredential / UserCredential --- issued to natural persons under a participant

Schema Structure¶

All credentials follow the W3C Verifiable Credentials Data Model v2.0 with three mandatory @context entries:

{
  "@context": [
    "https://www.w3.org/ns/credentials/v2",
    "https://w3id.org/reachhaven/harbour/core/v1/",
    "https://w3id.org/ascs-ev/simpulse-id/v1/"
  ],
  "type": ["VerifiableCredential", "<credential-type>"],
  "issuer": "<issuer-did>",
  "validFrom": "<iso-datetime>",
  "credentialSubject": {
    "id": "<subject-did-or-urn>",
    "type": "<subject-type>",
    "harbourCredential": "<harbour-gx-credential-urn>"
  },
  "credentialStatus": [{"type": "harbour:CRSetEntry", "statusPurpose": "revocation"}],
  "evidence": [{"type": ["harbour:CredentialEvidence"], "verifiablePresentation": "..."}]
}

LinkML Definitions¶

Credential types are defined in a single LinkML schema:

linkml/simpulseid-core.yaml --- All subject types, credential types, program metadata, and enums
linkml/importmap.json --- Import resolution for harbour-credentials and Gaia-X schemas

After modifying schemas, regenerate artifacts:

make generate