{ "$schema":          "https://json-schema.org/draft/2020-12/schema",
  "$id":              "https://schemas.mpai.community/PTF/V1.0/data/ErrorCode.json",
  "title":            "Error Code V1.0",
  "description":      "Standardised error code structure for PTF components.",
                      "type": "object", "required": ["Header", "ErrorID", "ErrorType", "ErrorMessage"],
                      "additionalProperties": false, "properties": {

    "Header":         { "type": "string", "pattern": "^PTF-ERR-V[0-9]{1,2}[.][0-9]{1,2}$" },

    "ErrorID":        { "type": "string", "description": "Unique identifier of the error instance." },

    "ErrorTime":      { "$ref": "https://schemas.mpai.community/OSD/V1.5/data/Time.json", "description": "Time at which the error occurred." },

    "ErrorType":      { "type": "string", 
                        "enum": [ "schemaViolation", "missingField", "invalidValue", "signatureFailure", "hashMismatch", 
                                  "unsupportedAlgorithm", "unsupportedProfile", "policyViolation", "internalError", "other" ],
                        "description": "Classification of the error." },

    "ErrorMessage":     { "type": "string", "maxLength": 512, "description": "Human-readable description of the error." },

    "ErrorDetails":     { "type": "object", "additionalProperties": false, "properties": {
      "Field":          { "type": "string", "description": "Field associated with the error, if applicable." },
      "Expected":       { "type": "string", "description": "Expected value or condition." },
      "Found":          { "type": "string", "description": "Actual value or condition found." } } },

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