{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://schemas.stacspec.org/v1.1.0/catalog-spec/json-schema/catalog.json",
  "title": "STAC Catalog Specification",
  "description": "This object represents Catalogs in a SpatioTemporal Asset Catalog.",
  "allOf": [
    {
      "$ref": "#/definitions/catalog"
    },
    {
      "$ref": "../../item-spec/json-schema/common.json"
    }
  ],
  "definitions": {
    "catalog": {
      "title": "STAC Catalog",
      "type": "object",
      "$comment": "title and description is validated through the common metadata.",
      "required": [
        "stac_version",
        "type",
        "id",
        "description",
        "links"
      ],
      "properties": {
        "stac_version": {
          "title": "STAC version",
          "type": "string",
          "const": "1.1.0"
        },
        "stac_extensions": {
          "title": "STAC extensions",
          "type": "array",
          "uniqueItems": true,
          "items": {
            "title": "Reference to a JSON Schema",
            "type": "string",
            "format": "iri"
          }
        },
        "type": {
          "title": "Type of STAC entity",
          "const": "Catalog"
        },
        "id": {
          "title": "Identifier",
          "type": "string",
          "minLength": 1
        },
        "links": {
          "$ref": "../../item-spec/json-schema/item.json#/definitions/links"
        }
      }
    }
  }
}