json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema",
      "title": "Namespace Value Resource",
      "description": "A single namespace value within a BEL Namespace.",
      "type": "object",
      "additionalProperties": false,
      "required": [
          "namespace_value"
      ],
      "properties": {
          "namespace_value": {
              "type": "object",
              "additionalProperties": false,
              "required": [
                  "type",
                  "identifier",
                  "name",
                  "title",
                  "species"
              ],
              "properties": {
                  "type": {
                      "type": "string"
                  },
                  "identifier": {
                      "type": "string"
                  },
                  "name": {
                      "type": "string"
                  },
                  "title": {
                      "type": [
                          "null",
                          "string"
                      ]
                  },
                  "species": {
                      "type": [
                          "null",
                          "string"
                      ]
                  },
                  "match_text": {
                      "type": "string"
                  }
              }
          }
      }
  }