| 摘要 |
A method and apparatus for mandating a hierarchy of TIPs (Technological Instrumental Packages), each defining an interface for handling a related data structure, such as a symbol table or a parse tree. The present invention structures a TIP into a plurality of abstract levels, which include an encapsulated concrete representation, a representation level, a definition level, and a conceptual level. The interface to a TIP consists of, for example, the conceptual level and a portion of the definition level. The concrete representation and representation level are hidden from the computer programmer. In addition, the present invention designates an interface for each level to perform creation/deletion, access, update, and output.
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