DIAGRAMS
图群
When you model something, you create a simplification of reality so that you can better understand the system you are developing. Using the UML, you build your models from basic building blocks, such as classes, interfaces, collaborations, components, nodes, dependencies, generalizations, and associations.
Diagrams are the means by which you view these building blocks. A diagram is a graphical presentation of a set of elements, most often rendered as a connected graph of vertices (things) and arcs (relationships). You use diagrams to visualize your system from different perspectives. Because no complex system can be understood in its entirety from only one perspective, the UML defines a number of diagrams so that you can focus on different aspects of your system independently.
Good diagrams make the system you are developing understandable and approachable. Choosing the right set of diagrams to model your system forces you to ask the right questions about your system and helps to illuminate the implications of your decisions.
，唯有讲述此间途经的美景，分享没有男主角的相片。
