【正文】 he 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。對(duì)象的服務(wù)及對(duì)象實(shí)例之間的消息通信共同組成了OOA模型的服務(wù)層。對(duì)象都是現(xiàn)實(shí)世界中應(yīng)用論域概念的抽象。因此，對(duì)問(wèn)題論域進(jìn)行充分分析及準(zhǔn)確理解是保證系統(tǒng)穩(wěn)定的重要基礎(chǔ)。而系統(tǒng)出問(wèn)題通常也是由于問(wèn)題論域的某些成份。以上簡(jiǎn)單介紹了面向?qū)ο蟮姆治黾霸诒疚闹械谋硎痉椒?，下面將研究面向?qū)ο蟮姆治鲈谝簤合到y(tǒng)設(shè)計(jì)中的應(yīng)用：第一層，對(duì)象－類層表示待開(kāi)發(fā)系統(tǒng)的基本構(gòu)造塊。系統(tǒng)的不同對(duì)象都分別執(zhí)行一定的工作或功能，它們之間通過(guò)消息通信，即所謂的協(xié)同，如圖中的箭頭所示。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。例如，當(dāng)定金取消后，相應(yīng)的訂戶也應(yīng)該被取消，這可能是一項(xiàng)事務(wù)規(guī)則。首先，每個(gè)軟件都建立在特定的現(xiàn)實(shí)世界中，OOA模型就是用來(lái)形式化該現(xiàn)實(shí)世界的“視圖”。一、面向?qū)ο蟮姆治龊?jiǎn)介：