An artifact diagramshows the physical constituents of a system on the computer. Artifacts include files, databases, and similar physical collections of bits. Artifacts are often used in conjunction with deployment diagrams. Artifacts also show the classes and components that they implement. (UML treats artifact diagrams as a variety of deployment diagram, but we discuss them separately.)

工件图显示运行在计算机上的系统的物理构成部分．工件包括文件，数据库和相似信息的物理集合．工件经常与部署图连起来使用．工件也显示他们实现的类和组件．(UML将工件图当作部署图的一种来处理，但我们会分别讨论它们．)

Apackage diagramshows the decomposition of the model itself into organization units and their dependencies.

包图显示模型本身被分解为组织单元和它们的依赖关系．

Atiming diagram is an interaction diagram that shows actual times across different objects or roles, as opposed to just relative sequences of messages. An interaction overview diagramis a hybrid of an activity diagram and a sequence diagram. These diagrams have specialized uses and so are not discussed in this book. See theUML Reference Manualfor more details.

时序图也是一个交互图，它显示实际时间消息在不同的对象或角色之间进行通讯时的情况．正好与消息的相关序列相反．交互概览图是一种混合了活动图和序列图特点的图．这些图有专门的用途，所以我们在这本书中不作讨论．要获取更多的细节可看UML参考指南．

This is not a closed list of diagrams. Tools may use the UML to provide other kinds of diagrams, although these are the most common ones that you will encounter in practice.

在这里并没有将所有的图都列出来．有些使用UML的工具可能会提供其它种类的图，虽然这些是你在实践中可能遇到的最普遍的问题．