1. In a computer system having a display, a processor, and a memory for storing items with metadata properties, a graphical user interface comprising: a plurality of display objects, each display object representing one or more items; and a property header including plurality of property controls, each property control corresponding to a respective property that is shared by a plurality of the items, wherein selection of a property control causes a list of filter terms and a list of check box controls to be presented on the display, each check box control corresponding to a respective one of the filter terms, wherein the list of filter terms is dynamically generated based on evaluation of the property corresponding to the property control and the display objects, wherein selection of a first check box control causes the items that are represented on the display to only include items that satisfy a first respective filter term corresponding to the first check box control, and selection of a second check box control when the first check box control is currently selected causes the items that are represented on the display to include items that satisfy either the first respective filter term corresponding to the first check box control or a second respective filter term corresponding to the second check box control, and wherein de-selection of the second check box control causes the items that are represented on the display to include only items that satisfy at least one respective filter term corresponding to a currently selected check box control.