【正文】 eing 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。 Tongsudejiang, referring to the object in the world is an objective entity, it can know something (that is, data storage), do something (that is, packaging services), and synergy with other objects (through the exchange of information ), Completed (modular) system all the features. Why is the object of interest 187。 The answer is simple date to reuse. While puter generated from the beginning, we have reusable code, but objectoriented technology allows reuse is not only the code, there are many other things. By objectoriented technology, we can reuse requirements, analysis, design, test plans, user interface and architecture, and so on. Objectoriented analysis is built on objects and their properties, a category of its members, and some of these basic overall concept of the foundation. Encyclopedia Britannica: In human awareness and understanding of the real world in the course of three tectonic widespread use of the law: 1. Distinguish between objects and their properties. For example, the distinction between a tree and the tree the size or location of space. 2. Distinguish between the object and its ponents. For example, the distinction between a tree and tree branches. 3. A different kind of object and distinguish. For example, all the trees and all types of stone formation and type of distinction. OOA is built on more than three on the basis of mon law. OOA model that describes a specific domain of the target, as well as a variety of structural relations and munications relations. OOA model has two purposes. First of all, every software have been established in specific real world, OOA model is used to formalize the realworld view. It established a variety of targets, namely that the major software systems as well as the organizational structure of the real world imposed on the software system of rules and constraints. Secondly, given a set of targets, OOA model provides them how collaborative software system to plete the work as specified. This synergy in the model that is targeted means of munication between a group of sources that link to the. Introduced more than a simple objectoriented analysis in this paper, and in that way, the following will study the objectoriented analysis of the hydraulic system design applications. The first tier, object kind of question that the development of the basic system building blocks. Objects are in the real world application of the concept of abstract domain. This is a model of the whole. Figure at the outer boundary that examples of the border, in fact it shows that targeted nonempty. The icons lining the border, said the boundary. Sometimes some can be defined as a block to achieve the target, that is, only boundary and no examples of the border. In some cases, the definition of this target is very useful. We will call them template class or abstract category. Class can form a template for the more senior of the polymer to provide a convenient means.The second layer, layer attributes, the object39。s properties and examples of linking together a model of the attributes of the OOA. We object to the storage of data known as the object39。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 implementation of certain work or function, munication between them through the news, the socalled synergies, as shown in Figure in the arrow. Object of services and examples of targeted information on munications between the mon ponents of the OOA model of the service. The fourth layer, structural layer, the layer responsible for the capture applicationspecific domain of the structure of relations. Generalization the special type of structure and access to member organizations, help to describe the type of space problem members of levels, through the collection of public and expanded to such properties in special cases to show the real world events for the general and Sexual. Overall part of the structure of a basic human organization, that is natural and part of the overall structure, so that some parts of the polymer structure as a whole. For example, a car from the engine, transmission and brake ponents. Fifth floor, the theme layer, or global system subsystem or model. As OOA model of the structure of large and plex, so many of the objects it is sometimes difficult to handle. Thus, the object can return to the theme of all, can be the object of a frameup to achieve. 35