2. The method of claim 1 , wherein the discovering attributes comprises: determining data sources of the widget instances on a per widget-instance basis; determining configuration properties of the widget instances on a per widget-instance basis; and determining network paths of the widget instances on a per widget-instance basis.
2. The method of claim 1 , wherein the discovering attributes comprises: determining data sources of the widget instances on a per widget-instance basis; determining configuration properties of the widget instances on a per widget-instance basis; and determining network paths of the widget instances on a per widget-instance basis. 3. The method of claim 2 , wherein: the specified change to the unspecified widget instances comprises a change to at least one data source of the determined data sources; the specified widget-instance attribute comprises an identifier of the at least one data source; and the automatically identifying the unspecified widget instances comprises determining, from the widget-instance relationship data, those of the identified widget instances that utilize the at least one data source.