ExperimentalReadonly ExperimentalcontractReadonly ExperimentaldimensionDimension field the marks group by.
Optional Readonly ExperimentaldistinctDistinct categories the source reports, when more exist than were returned.
Readonly ExperimentalidentityReadonly ExperimentalkindReadonly ExperimentalmarksReadonly ExperimentalmeasureOptional Readonly ExperimentalmessageRequired when status is unsupported or error.
Readonly ExperimentalnullReadonly ExperimentalorderingReadonly ExperimentalprovenanceReadonly ExperimentalstatusOptional Readonly ExperimentaltitleOptional Readonly ExperimentaltotalTotal across all marks when the producer knows it (may exceed the sum).
Category / group-by distribution over one dimension field.