json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Codex Item Schema",
      "type": "object",
      "additionalProperties": false,
      "properties": {
          "id": {
              "type": "string"
          },
          "instanceId": {
              "type": "string"
          },
          "description": {
              "type": "string"
          },
          "title": {
              "type": "string"
          },
          "altTitle": {
              "type": "string"
          },
          "series": {
              "type": "string"
          },
          "contributor": {
              "type": "array",
              "items": {
                  "type": "object",
                  "properties": {
                      "type": {
                          "type": "string"
                      },
                      "name": {
                          "type": "string"
                      }
                  }
              },
              "additionalItems": true,
              "_uniqueItems": true
          },
          "publisher": {
              "type": "string"
          },
          "date": {
              "type": "string"
          },
          "type": {
              "type": "string"
          },
          "format": {
              "type": "string"
          },
          "identifier": {
              "type": "array",
              "items": {
                  "type": "object",
                  "properties": {
                      "value": {
                          "type": "string"
                      },
                      "type": {
                          "type": "string"
                      }
                  }
              },
              "additionalItems": true,
              "_uniqueItems": true
          },
          "source": {
              "type": "string"
          },
          "language": {
              "type": "array",
              "items": {
                  "type": "string"
              }
          },
          "rights": {
              "type": "string"
          },
          "copyNumber": {
              "type": "number"
          },
          "barcode": {
              "type": "string"
          },
          "vendorPackage": {
              "type": "string"
          },
          "coverage": {
              "type": "object"
          },
          "location": {
              "type": "array",
              "items": {
                  "type": "object"
              },
              "additionalItems": true
          },
          "itemStatus": {
              "type": "string"
          },
          "isSelected": {
              "type": "boolean"
          },
          "isCustomized": {
              "type": "boolean"
          }
      },
      "required": [
          "id",
          "instanceId",
          "title"
      ]
  }