{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "catalog.json#",
  "title": "STAC Catalog Specification",
  "description": "This object represents Catalogs in a SpatioTemporal Asset Catalog.",
  "allOf": [
    {
      "$ref": "#/definitions/catalog"
    }
  ],
  "definitions": {
    "catalog": {
      "title": "Catalog",
      "type": "object",
      "required": [
        "stac_version",
        "id",
        "description",
        "links"
      ],
      "properties": {
        "stac_version": {
          "title": "STAC version",
          "type": "string",
          "const": "0.9.0"
        },
        "stac_extensions": {
          "title": "STAC extensions",
          "type": "array",
          "uniqueItems": true,
          "items": {
            "type": "string"
          }
        },
        "id": {
          "title": "Identifier",
          "type": "string"
        },
        "title": {
          "title": "Title",
          "type": "string"
        },
        "description": {
          "title": "Description",
          "type": "string"
        },
        "links": {
          "title": "Links",
          "type": "array",
          "items": {
            "$ref": "#/definitions/link"
          }
        }
      }
    },
    "link": {
      "type": "object",
      "required": [
        "rel",
        "href"
      ],
      "properties": {
        "href": {
          "title": "Link reference",
          "type": "string"
        },
        "rel": {
          "title": "Link relation type",
          "type": "string"
        },
        "type": {
          "title": "Link type",
          "type": "string"
        },
        "title": {
          "title": "Link title",
          "type": "string"
        }
      }
    }
  }
}