4 Perspectives in Rational Rose

After the initial UML diagram of the mirrors to the final drawing of the computer room charge system, the function and position of UML in software engineering is very intuitive. UML is a kind of language for the specification, construction, visualization and documentation of software system, which integrates the core concepts of Booch method, OMT method and Oose method, and forms a unified, public and widely used modeling language.

UML uses the model to describe various aspects of the system from different aspects of the characteristics, structural characteristics, static characteristics, dynamic characteristics and other aspects of the formation of different views (view). A view is a feature that describes a particular aspect of the system, and in each view you can visualize the concepts in a representation view using one or several specific diagrams. In the rational Rose2007 software, you can see a row of view from the box in the upper left corner, use caseview,logical view,component view,deployment View,model from top to bottom properties-use case views, logical views, component views, deployment views, and model tools. This means that in the software design phase, Rational Rose2007 will mainly from these 4 large views of the software analysis and design.

The use Case view contains all the actors, use cases, and use case diagrams in the system, as well as sequence diagrams, collaboration diagrams, activity diagrams, and state diagrams, if necessary. The use Case view is irrelevant to the realization of the function in the system, and the focus is on the high-level abstraction of the system function, which is suitable for analyzing and acquiring the system, and not paying attention to the concrete implementation method of the system. The model is established in the requirement analysis stage of software development, and the functional requirements of software are analyzed.

Logical view: Focusing on how the system implements the functions described in the use case, the user uses object-oriented techniques to decompose the system into a series of classes, and provides a detailed design model diagram of the system by means of class diagrams and class templates. Can include classes, class tools, interfaces, class diagrams, collaboration diagrams, State diagrams, and so on.

The component view is used to describe the various implementation modules in the system and the dependencies between them, which are mainly composed of package, component and component diagram. A package is a component-related group, and a component is a different type of code module, including a source code component, a binary code widget, and an executable file, and additional information about the artifacts can be added to the component view, showing the organization of the software artifacts and the dependencies between the artifacts.

The deployment view shows the actual deployment of the system in order to facilitate understanding of the architectural views that the system uses in the analysis and design for the physical distribution of a set of processing nodes. Only one deployment view is included in the system to illustrate the distribution of various processing activities at each node of the system, which can be continuously improved. Includes processes, processors, and sets. A process is a thread that executes in its own memory space; A processor is any machine that has a function of processing data, such as a database; a process can be performed on one or more processors; a device is any machine that has no processing function, such as a printer.

In understanding the UML 9 kinds of graphs, from these 4 view aspect will help us to the software development understanding, 9 kind of diagram very has the sense understanding in the system development 4 angle of view, the UML use also is very easy, to the soft examination also very helpful.

4 different perspectives from Rational Rose