{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/Attribute",
  "title": "Attribute",
  "type": "object",
  "description": "A custom attribute definition.",
  "properties": {
    "name": {
      "type": "string",
      "description": "Output only. Resource name of the attribute.",
      "readOnly": true
    },
    "displayName": {
      "type": "string",
      "description": "Required. Display name for the attribute."
    },
    "description": {
      "type": "string",
      "description": "Description of the attribute."
    },
    "definitionType": {
      "type": "string",
      "description": "Type of the attribute definition.",
      "enum": [
        "DEFINITION_TYPE_UNSPECIFIED",
        "SYSTEM_DEFINED",
        "USER_DEFINED"
      ]
    },
    "scope": {
      "type": "string",
      "description": "Scope of the attribute.",
      "enum": [
        "SCOPE_UNSPECIFIED",
        "API",
        "VERSION",
        "SPEC",
        "API_OPERATION",
        "DEPLOYMENT",
        "DEPENDENCY"
      ]
    },
    "dataType": {
      "type": "string",
      "description": "Data type of the attribute values.",
      "enum": [
        "DATA_TYPE_UNSPECIFIED",
        "ENUM",
        "JSON",
        "STRING"
      ]
    },
    "allowedValues": {
      "type": "array",
      "description": "Allowed values for ENUM data type.",
      "items": {
        "$ref": "#/components/schemas/AllowedValue"
      }
    },
    "cardinality": {
      "type": "integer",
      "format": "int32",
      "description": "Maximum number of values for the attribute."
    },
    "mandatory": {
      "type": "boolean",
      "description": "Whether the attribute is mandatory."
    },
    "createTime": {
      "type": "string",
      "format": "date-time",
      "description": "Output only. Time the attribute was created.",
      "readOnly": true
    },
    "updateTime": {
      "type": "string",
      "format": "date-time",
      "description": "Output only. Time the attribute was last updated.",
      "readOnly": true
    }
  }
}