作者: David B. Pitfield , David J. Long
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摘要: A method and apparatus for associating methods or attributes on a per-instance basis is provided. One technique providing “per-instance attributes” involves properties property bundles. second categories wherein the instance can be thought of as being “placed” into one more categories. methods” policies. In any these techniques, may used in following ways: (1) different instances same class are associated with where not class; (2) two classes either classes.