json_schema: {
      "description": "Specifies how to import GeoJSON files as namespaces.",
      "properties": {
          "path": {
              "_id": "path",
              "description": "Relative or absolute path to the GeoJSON file.",
              "title": "Path schema.",
              "type": "string"
          },
          "referenceId": {
              "_id": "referenceId",
              "description": "Specifies which of the feature properties in the GeoJSON file should be used as ID.",
              "title": "ReferenceId schema.",
              "type": "string"
          }
      },
      "required": [
          "path",
          "referenceId"
      ],
      "title": "Schema for importing GeoJSON.",
      "type": "object"
  }