Object
  |
  +--xp.system.DispatcherObject
        |
        +--xp.util.ListCollection

The List Collection lets you programmatically manage a group of related items, called collection items. Each collection item in this set has properties that are described in the metadata of the collection item class definition. Components can expose properties as collections, which you can manipulate while authoring by using the Values dialog box from the Component inspector. Using this dialog box, you can add items, remove items, change properties of items, and change the position of items within the collection