{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://chris-page-gov.github.io/okf-explorer/profile/explore-okf/v1/endpoint-label-index.schema.json",
  "title": "Explore OKF endpoint label index",
  "description": "A compact, snapshot-bound index that gives every graph-reachable Explorer route a governed human label and type without full-record hydration.",
  "type": "object",
  "required": [
    "schema",
    "snapshot",
    "default_language",
    "opaque_identifier_patterns",
    "entries",
    "counts"
  ],
  "properties": {
    "schema": {
      "const": "okf-explorer-endpoint-label-index.v1"
    },
    "snapshot": {
      "$ref": "#/$defs/nonEmptyShortString"
    },
    "generated_at": {
      "type": "string",
      "format": "date-time",
      "maxLength": 64
    },
    "default_language": {
      "const": "en-GB"
    },
    "opaque_identifier_patterns": {
      "type": "array",
      "maxItems": 64,
      "uniqueItems": true,
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 128,
        "pattern": "^[A-Za-z0-9._~:/-]+\\*?$"
      }
    },
    "entries": {
      "type": "array",
      "maxItems": 100000,
      "items": {
        "$ref": "#/$defs/entry"
      }
    },
    "counts": {
      "type": "object",
      "required": [
        "entries"
      ],
      "properties": {
        "entries": {
          "type": "integer",
          "minimum": 0,
          "maximum": 100000
        }
      },
      "additionalProperties": false
    }
  },
  "additionalProperties": false,
  "$defs": {
    "nonEmptyShortString": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256,
      "pattern": "\\S"
    },
    "httpUrl": {
      "type": "string",
      "format": "uri",
      "allOf": [
        {
          "pattern": "^https?://(?:\\[[0-9A-Fa-f:.]+\\]|[A-Za-z0-9](?:[A-Za-z0-9.-]*[A-Za-z0-9])?)(?::(?:[1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5]))?(?:[/?#]|$)"
        },
        {
          "pattern": "^[\\u0021-\\u007E]+$"
        },
        {
          "pattern": "^(?!.*[\\\"'<>\\\\^`{|}])"
        },
        {
          "pattern": "^(?!.*%(?![0-9A-Fa-f]{2}))"
        }
      ],
      "maxLength": 4096
    },
    "entry": {
      "type": "object",
      "required": [
        "route",
        "iri",
        "label",
        "language",
        "type",
        "label_authority"
      ],
      "properties": {
        "route": {
          "type": "string",
          "minLength": 3,
          "maxLength": 1024,
          "pattern": "^[a-z][a-z0-9-]*(?:/(?:[A-Za-z0-9._~-]|%(?!(?:2D|2E|3[0-9]|4[1-9A-F]|5[0-9A]|5F|6[1-9A-F]|7[0-9A]|7E))[0-9A-F]{2})+)+$"
        },
        "iri": {
          "type": "string",
          "format": "uri",
          "maxLength": 4096
        },
        "label": {
          "type": "string",
          "minLength": 1,
          "maxLength": 512,
          "pattern": "^(?!Missing label$)(?!\\s)(?!.*[\\u0000-\\u001F\\u007F]).*\\S$"
        },
        "language": {
          "type": "string",
          "minLength": 2,
          "maxLength": 64,
          "pattern": "^[A-Za-z]{2,8}(?:-[A-Za-z0-9]{1,8})*$"
        },
        "type": {
          "type": "string",
          "minLength": 1,
          "maxLength": 256,
          "pattern": "^(?!Missing label$)(?!\\s)(?!.*[\\u0000-\\u001F\\u007F]).*\\S$"
        },
        "label_authority": {
          "type": "object",
          "required": [
            "class",
            "source"
          ],
          "properties": {
            "class": {
              "enum": [
                "source-native",
                "domain-profile",
                "editorial"
              ]
            },
            "source": {
              "$ref": "#/$defs/httpUrl"
            }
          },
          "additionalProperties": false
        }
      },
      "additionalProperties": false
    }
  }
}