A method used in a computer system for managing attribute data for subobjects of a class of data objects. When a data object is created, a set of default attributes are stored in internal memory in association with the data object for all instances of subobjects of the data object. A set of attributes for overriding the default attributes are stored in internal memory for each instance of a subobject. When a query or system response is required which requires knowledge of the attributes for an instance of a subobject, these final attributes are formed by fetching the default attributes associated with the data object and by overwriting the default attributes with the overriding attributes, if any, associated with the instance of the subobject. In a preferred embodiment, the invention is used in a computer windowing system in which windows are associated with data objects called widgets or gadgets and subobjects of the data objects are associated with items which are displayed within an associated window.

 
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