{
  "Sessions": {
    "type": "object",
    "required": ["start", "end", "intervals", "groups"],
    "properties": {
      "start": {
        "type": "string",
        "format": "date-time",
        "description": "The start time of the data being returned."
      },
      "end": {
        "type": "string",
        "format": "date-time",
        "description": "The exclusive end time of the data being returned."
      },
      "intervals": {
        "type": "array",
        "items": {
          "type": "string",
          "format": "date-time"
        },
        "description": "The time slices of the timeseries data given in the `groups[].series` field."
      },
      "groups": {
        "type": "array",
        "items": {
          "$ref": "#/Group"
        }
      }
    }
  },
  "Group": {
    "type": "object",
    "description": "A grouped result, as requested by the `groupBy` request parameter.",
    "required": ["by", "totals", "series"],
    "properties": {
      "by": {
        "type": "object",
        "description": "These are key/value pairs, the key being the requested `groupBy` property with its corresponding value."
      },
      "totals": {
        "type": "object",
        "description": "These are key/value pairs, the key being the requested `field`, and the value the corresponding total over the requested time frame."
      },
      "series": {
        "type": "object",
        "description": "These are key/value pairs, the key being the requested `field`, and the value is an array of aggregated values. The array corresponds to the times given in the `intervals` array.",
        "additionalProperties": {"type": "array", "items": {"type": "integer"}}
      }
    }
  }
}