To express dimension or metric filters. The fields in the same FilterExpression need to be either all dimensions or all metrics.

The dimensions requested. All defined dimensions must be used by one of the following: dimension_expression, dimension_filter, pivots, order_bys.

Describes the visual format of the report's dimensions in columns or rows. The union of the fieldNames (dimension names) in all pivots must be a subset of dimension names defined in Dimensions. No two pivots can share a dimension. A dimension is only visible if it appears in a pivot.

To express dimension or metric filters. The fields in the same FilterExpression need to be either all dimensions or all metrics.

The date range to retrieve event data for the report. If multiple date ranges are specified, event data from each date range is used in the report. A special dimension with field name "dateRange" can be included in a Pivot's field names; if included, the report compares between date ranges. In a cohort request, this dateRanges must be unspecified.

Optional. The configuration of comparisons requested and displayed. The request requires both a comparisons field and a comparisons dimension to receive a comparison column in the response.

The metrics requested, at least one metric needs to be specified. All defined metrics must be used by one of the following: metric_expression, metric_filter, order_bys.

The specification of cohorts for a cohort report. Cohort reports create a time series of user retention for the cohort. For example, you could select the cohort of users that were acquired in the first week of September and follow that cohort for the next six weeks. Selecting the users acquired in the first week of September cohort is specified in the cohort object. Following that cohort for the next six weeks is specified in the cohortsRange object. For examples, see Cohort Report Examples. The report response could show a weekly time series where say your app has retained 60% of this cohort after three weeks and 25% of this cohort after six weeks. These two percentages can be calculated by the metric cohortActiveUsers/cohortTotalUsers and will be separate rows in the report.