json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema",
      "properties": {
          "last_update": {
              "_format": "date-time",
              "type": "string"
          },
          "name": {
              "pattern": "^[^/]+$",
              "type": "string"
          },
          "urls": {
              "format": "urls",
              "type": "object"
          }
      },
      "required": [
          "urls",
          "name",
          "last_update"
      ],
      "type": "object"
  }