Institute of Electrical & Electronic Engineers
Most development tools manipulate objects by changing values of their attributes. If the object should change more radically, problems arise. The amount of available information can vary from instance to instance and can be collected incrementally. It can happen that there exists no class suitable for all known attributes and so even movement of the instance to another class can be complicated. The authors can create exhaustive number of classes to cover all predicted variants, but still some other combinations of data can occur.