{ "$schema":                    "https://json-schema.org/draft/2020-12/schema",
  "$id":                        "https://schemas.mpai.community/PTF/V1.0/data/TrustOperation.json",
  "title":                      "Trust Operation V1.0", "description": "Record of a trust-related operation within the PTF framework.",
                                "type": "object", "required": ["Header", "TrustOperationID", "OperationType", "TargetType", "TargetID", "ActorID", "Status", "Signature"],
                                "additionalProperties": false, "properties": {

    "Header":                   { "type": "string", "pattern": "^PTF-TOP-V[0-9]{1,2}[.][0-9]{1,2}$" },
    "MInstanceID":              { "type": "string" },
    "TrustOperationID":         { "type": "string" },
    "TrustOperationTime":       { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/Time.json" },

    "OperationType":            { "$ref": "https://schemas.mpai.community/PTF/V1.0/data/TrustOperationTaxonomy.json#/definitions/OperationType",
                                  "description": "Operation type identifier from the Trust Operation Taxonomy." },

    "TargetType":               { "type": "string", "enum": [ "CII", "InstanceCredential", "ProcessLifecycleCredential", "AttestationEvidence", "PolicyBinding", "Profile" ],
                                  "description": "Type of object on which the operation was performed." },

    "TargetID":                 { "type": "string", "description": "Identifier of the target object." },

    "ActorID":                  { "type": "string", "description": "Identifier of the entity performing the operation." },

    "Status":                   { "type": "string", "enum": [ "Success", "Failure" ],
                                  "description": "Outcome of the trust operation." },

    "FailureReason":            { "type": "string", "description": "Optional reason for failure." },

    "Signature":                { "type": "object", "required": ["Algorithm", "Value"],
                                  "description": "Digital signature over the trust operation.",
                                  "additionalProperties": false, "properties": {
      "Algorithm":              { "$ref": "https://schemas.mpai.community/PTF/V1.0/data/SecurityAlgorithmTaxonomy.json#/properties/Signature",
                                  "description": "Signature algorithm identifier from the Security Algorithm Taxonomy." },
      "Value":                  { "type": "string", "description": "Digital signature value encoded as base64url." } } },

    "DataXMData":               { "$ref": "https://schemas.mpai.community/PTF/V1.0/data/DataExchangeMetadata.json" },
    "DescrMetadata":            { "type": "string", "maxLength": 2048 } } }