{ "$schema":                    "https://json-schema.org/draft/2020-12/schema",
  "$id":                        "https://schemas.mpai.community/PTF/V1.0/data/AttestationEvidence.json",
  "title":                      "Attestation Evidence V1.0", "description": "Typed evidence for runtime trust decisions, classified using SET.",
                                "type": "object", "required": ["Version", "EvidenceItems"], "additionalProperties": false, "properties": {

    "Header":                   { "type": "string", "pattern": "^PTF-ATE-V[0-9]{1,2}[.][0-9]{1,2}$" },
    "MInstanceID":              { "type": "string" },
    "AttestationEvidenceID":    { "type": "string" },
    "AttestationEvidenceTime":  { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/Time.json", "description": "Time of evidence collection." },

    "EvidenceItems":            { "type": "array", "description": "List of evidence items classified using the Security Evidence Taxonomy.",
                                  "items": { "type": "object", "required": ["Type", "Value"], "additionalProperties": false, "properties": {

      "Type":                   { "$ref": "https://schemas.mpai.community/PTF/V1.0/data/SecurityEvidenceTaxonomy.json#/definitions/EvidenceType", 
                                  "description": "Evidence type identifier from the Security Evidence Taxonomy." },

      "Value":                  { "type": "string", "description": "Opaque evidence payload encoded as base64url." },

      "Verifier":               { "type": "string", "description": "ID of the component that produced or verified the evidence." },

      "HashAlgorithm":          { "$ref": "https://schemas.mpai.community/PTF/V1.0/data/SecurityAlgorithmTaxonomy.json#/properties/Hash",
                                  "description": "Optional hash algorithm identifier from the Security Algorithm Taxonomy." },

      "HashValue":              { "type": "string", "description": "Optional hash of the evidence payload (hex or base64url)." } } } },

    "Signature":                { "type": "object", "description": "Optional signature over the entire attestation evidence object.",
                                  "required": ["Algorithm", "Value"], "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 } } }