把追踪应用到样例模型中。
用例模型概述，角色概述，以及内容图表
Use Case Model Overview, Actors Overview, and Context diagrams
捕获和文档化使用用例模型的功能需求。
Capturing and documenting functional requirements with use case models.
我们为什么需要与soa一致的用例模型？
用例模型是静态的，并不显示用例执行的顺序。
The use case model is static; it doesn't show the sequence in which the use cases are performed.
创建用例模型的要点是减小错误构建系统的风险。
The point of creating use case models is to mitigate the risk of building the wrong system.
这不意味着用例模型只能够包含来自于前景的元素。
This doesn't mean that the Use-Case Model can only contain elements from the Vision.
图6A.架构师活动：用例模型优化。
定义业务用例、建立到需求的跟踪关系(用例模型)。
Define the business use cases and establish traceability relationships to the requirements (use-case models).
此图已经在图13中显示过了，并且表示系统用例模型。
This diagram has already been shown in Figure 13, and represents the System Use Case Model.
而用例模型又是随后的用例规格说明 的来源。
The Use-Case Model in turn is the source for the subsequent Use-Case Specifications.
识别与外部实体的交互在构建用例模型的需求收集阶段进行。
Interactions with external entities are identified during the requirements gathering phase of establishing a use case model.
此时通过执行某种级别的分析，可以创建并记录正式的用例模型。
With a level of analysis performed at this point, a formal use case model can be created and documented.
一个用例模型由一张图表和一组阐明该用例的描述组成。
A use case model consists of a diagram and a set of descriptions that clarify the use case.
用例模型提供有关您正在开发的系统或应用程序的行为的详细信息。
The use case model provides detailed information about the behaviors of the system or application that you are developing.
在详细的检查我们的用例模型时，被包含和扩展的用例频繁的出现。
Included and extended use cases frequently emerged during detailed review of our use-case model.
用例模型可帮助架构师或开发人员理解需要构建的软件构件和服务。
A use case model helps the architect or developer understand the software artifacts and service that need to be built.
虽然，的确是这些人做这些事情，但您不想在用例模型中描述这些。
Although it is true that these people do these things, it is not what you want to depict in your use-case model.
用例模型有两种基本风格：基本用例模型和系统用例模型。
There are two basic flavors of use case models: essential use case models, and system use case models.
牢记您的用例模型的核心是用例，不是图，所以这通常是您的重点。
Keep in mind that the heart of your use-case model are the use cases, not the diagrams, so that is generally where your focus will be.
因为大部分软件系统支持多个目的，大部分用例模型由多个用例组成。
Because most software systems support many goals, most use case models will consist of many use cases.
它包括了描述用例模型中所确定的功能需求的逻辑实现的类和序列图。
It consists of class and sequence diagrams that describe the logical implementation of the functional requirements that you identified in the use case model.
用例模型还包括描述用户与系统如何交互的用例图和活动图。
The use case model also includes use case diagrams and activity diagrams that describe how users interact with the system.
这些映射是用于识别受项目所影响的现有用例模型的子集的。
These mappings are used to identify the subset of the existing use-case model that is affected by the project.
而架构师则会用xde进行各种活动，而不仅限于用例模型。
The architect can use XDE for a variety of activities and is not limited to the use-case models.
类似地，用例代表较大流程的一部分，用例模型代表整个流程。
Similarly, a use case represents a single piece of the larger process, with a use case model representing the entirety.
用例模型可以作为新项目的参考，寻求单个交付项目生命周期之外的重用。
The use case models can be used as reference for new projects seeking re-use beyond the lifetime of a single delivery project.
结果产生的系统用例模型如图13所示，并且包括已确定的所有用例。
The resulting System Use Case model is shown in Figure 13, and includes all the use cases identified.
当建立用例模型的时候，您必须确保每个启动被某种类型的系统响应访问到。
As you model your use case, you must ensure that every initiation is addressed by some sort of system response.
使用UML和支持RUP 的工具来构建用例模型是最为常见的方法。
Use case modeling using UML and tools that support RUP are most commonly used.
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