json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "description": "Describe the Activity Dump File",
      "type": "object",
      "required": [
          "url",
          "checksum",
          "size",
          "version",
          "recordType"
      ],
      "properties": {
          "url": {
              "type": "string",
              "description": "The retrieval URL at which the peer can retrieve the activity dump file."
          },
          "checksum": {
              "type": "string",
              "description": "The SHA-1 checksum of the contents of the activity dump file referred to by url."
          },
          "size": {
              "type": "number",
              "description": "The size of the activity dump file in bytes."
          },
          "version": {
              "type": "string",
              "description": "The version of the SAS-SAS protocol used for generating this file."
          },
          "recordType": {
              "type": "string",
              "description": "The type of records contained in the activity dump file."
          }
      }
  }