请结合文章内容，为下列空格选择合适的词汇填入。 1. Traditional structured analysis techniques focus upon the flow of _______ within a system. 2. Object-oriented analysis emphasizes the building of real-world models from the perspective of classes and objects found in the vocabulary of the _______ domain. 3. Object-oriented design method encompasses the process of object-oriented decomposition and a _______ for depicting logical and physical models, as well as static and dynamic models of the system under design. 4. Object-oriented programming organizes programs as cooperative collections of objects, each of which represents an _______ of some class. 5. Classes are all members of a hierarchy of classes united via _______ relationships.

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