1. A computer program product comprising one or more physical computer-readable media having thereon computer-executable instructions that, when executed by one or more processors of the computing system, cause the computing system to perform a method comprising: an act of providing a tree formulation user interface that is structured such that a user may provide a designation of a particular data item, and may provide a child characteristic of data items that are to be assigned as child data items of the particular data item; and an act of automatically formulating a query that may be used to discover child data items of the particular data item using the designation of the particular data item and the child characteristic.