json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "timestamp": {
              "description": "the number of seconds since the Unix epoch",
              "type": "string",
              "minLength": 10,
              "maxLength": 10,
              "pattern": "[0-9]{10,10}"
          },
          "status": {
              "description": "represents the overall status of all messages from the analysis results",
              "oneOf": [
                  {
                      "$ref": "#/definitions/lgtm"
                  },
                  {
                      "$ref": "#/definitions/fyi"
                  },
                  {
                      "$ref": "#/definitions/nmw"
                  }
              ]
          },
          "url": {
              "description": "a publicly readable file, which contains JSON formatted analysis results. Those results should conform to the JSON format of the ShipshapeResponse protocol buffer message defined https://github.com/google/shipshape/blob/master/shipshape/proto/shipshape_rpc.proto",
              "type": "string"
          },
          "v": {
              "type": "integer",
              "enum": [
                  0
              ]
          }
      },
      "required": [
          "timestamp",
          "url"
      ],
      "definitions": {
          "lgtm": {
              "title": "Looks Good To Me",
              "description": "indicates the analysis produced no messages",
              "type": "string",
              "enum": [
                  "lgtm"
              ]
          },
          "fyi": {
              "title": "For your information",
              "description": "indicates the analysis produced some messages, but none of them indicate errors",
              "type": "string",
              "enum": [
                  "fyi"
              ]
          },
          "nmw": {
              "title": "Needs more work",
              "description": "indicates the analysis produced at least one message indicating an error",
              "type": "string",
              "enum": [
                  "nmw"
              ]
          }
      }
  }