json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "title": "Wangscape terrain hypergraph schema",
      "description": "Specifies the clique memberships of each terrain in a Wangscape configuration.",
      "patternProperties": {
          "^[0-9a-zA-Z_-]+$": {
              "title": "Clique list schema",
              "description": "Lists all the cliques which contain a certain terrain.",
              "type": "array",
              "items": {
                  "title": "Clique schema",
                  "description": "Specifies a terrain clique as a list of terrain IDs.",
                  "type": "array",
                  "items": {
                      "title": "Terrain ID schema",
                      "description": "Specifies a terrain type.",
                      "type": "string",
                      "pattern": "^[0-9a-zA-Z_-]+$"
                  },
                  "minItems": 1
              }
          }
      }
  }