【正文】
nt projects, whether it is realtime control systems, database systems and artificial intelligence systems, or specific to automatic code generation, or expand the plant to a puter integrated manufacturing system, there is a A mon demand in the analysis stage is the establishment of information systems model. Among the many methods of analysis, objectoriented analysis (OOA) is more close to human way of thinking, is being more and more systematic analysis of officers. Objectoriented perspective on the view that the structure of a puter program should be required to resolve the issue of consensus, rather than with a consistent method of analysis. Experience has shown that for any software system, one of the most stable element of the problem is the corresponding domain (PROBLEM DOMAIN) the ingredients. The system is also the problem because the problem is usually the domain of certain ingredients. Therefore, the issue of domain analysis of the full and accurate understanding is to ensure systemic stability of the important foundation. So what is it targeted in the end 187。s properties. Examples of class between the constraints, they must ply with the application of the domain On certain restrictions or conditions of service rules. For example, after the abolition of deposit, the corresponding subscribers should also be cancelled, this may be a service rules. We call for these examples of linking bound. The third tier, service layer, the object of munication services and news of the OOA model of the service. We object to the work done by the method known as the services or. The different objects are respectively the implemen