Whereas it is generally acknowledged that code tangling reduces the quality of software and that aspect-oriented programming (AOP) is a means of addressing this problem, there is | as yet | no clear denition or characterisation of AOP. Therefore, the main goal of the ECOOP'97 AOP workshop was to identify the \good questions" for exploring the idea of AOP.

Designing reusable software modules can be extremely difficult. The design must be balanced between being general enough to address the needs of a wide range of clients and being focused enough to truly satisfy the requirements of each specific client. One area where it can be particularly difficult to strike this balance is in the implementation strategy of the module. The problem is that generalpurpose implementation strategies, tuned for a wide range of clients, aren't necessarily optimal for each specific client-this is especially an issue for modules that are intended to be reusable and yet provide high-performance.

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