The Post-Filter Transformation gives you the option to "flip" the results of a Data View with ease. For example, if your Data View includes the kids attending summer camp, selecting the Parent transformation will find the parents of those kids. If your Data View includes Adult Members & Attendees, choosing the Children transformation will give you the children of those selected. To provide as much flexibility as possible, Rock allows you to transform data views by applying the following transformations: Allowed Check-InAllowed Check-In ChildrenChildrenFamily MembersFatherGiving LeaderGrandchildGrandparentHead of HouseholdMotherParentsSpouse