| 摘要 |
A method for operating a digital data processing system (10) for modifying the characteristics of an object, such as an application program (applet), a data file, or a device, that is selected from a base class of objects. The method includes a first step of, in response to an input signal, accessing within a storage device a data structure that is associated with the object. The data structure is referred to herein as a dynamic Property Sheet, and is capable of storing a Property list having at least one entry that is descriptive of at least one property of the base class. The data structure is further capable of storing a Method list having at least one entry that is descriptive of at least one method that is available to the base class. A next step modifies the data structure to add, modify, or delete at least one entry. A next step stores the modified data structure within the storage device so that when the object is subsequently invoked for use, the object is utilized in accordance with the modified data structure.
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