相比之下，外部系统是公司与其客户群之间的接口。
By contrast, an external system serves as an interface between a company and its customer base.
例如，它可以验证或通知外部系统。
为案例研究产生一个外部系统模型。
因此，它应同时属于角色和外部系统。
向外部系统下单的具体代码放在这里。
无线交易可以使用外部系统来收集数据。
Wireless trading may employ external systems to gather data.
开放性：与当前内部或外部系统的集成。
Openness: Integration with existing internal or external systems.
将与外部系统进行HTTP通信的端口。
Sending port number - the port over which HTTP communication will happen with the external system.
为了连接到外部系统，我们必须使用导入。
导出用于访问从另一个外部系统发送的数据。
An export is used to access data being sent from another external system.
在系统和用户、通道及外部系统间流动的信息的描述。
A description of the information that is flowing between the system and the users, channels, and external systems.
这种体系结构定义了负责与外部系统连接的资源适配器。
The architecture defines resource adapters that are responsible for connectivity to external systems.
然而，在实际中，当集成多个外部系统时，情况并非如此。
In reality, however, this is often not the case when integrating to multiple external systems.
同时公开、组合和协调一系列服务调用，或连接到外部系统。
Expose, compose, and coordinate a series of service calls together, or connect to external systems.
图2显示了一个将两个外部系统存放于不同数据槽中的示例。
Figure 2 shows a case where two external systems deposit files in different slots.
这可以包括人（不仅仅是最终用户）、外部系统和其它组织。
This may include people (not just the end user), external systems, and other organizations.
许多人使用外部系统（比如开源的GPG）来加密电子邮件。
Many others work with external systems, such as the open-source GPG, to encrypt e-mail.
需考虑三种外部系统：雨刷器接口，挡风玻璃，和汽车电子系统。
Three external systems are considered: the wiper interface, the windshield, and the car electrical system.
创建一个会在将某个成员添加到中心时通知外部系统的传出实例。
Create an outbound instance that will notify an external system when a member is added to the hub.
这可提供需求及其对外部系统的实现依赖关系间的关键可跟踪性。
This provides key traceability between the requirements and their implementation dependency on external systems.
正如前面所述，这些构件并不处理系统和外部系统间的交换序列。
These artifacts, as stated earlier, do not address the sequence of the interactions between the system and the external entities.
它通过分析信息组成部分来帮助您了解外部系统所支持的数据格式。
It helps you to understand the data formats supported by the external system by analyzing the information elements.
确定并说明系统提供给其他内部和外部系统以及应用程序自身的服务。
Identifies and specifies the services that the system offers to other internal and external systems and within the application itself.
在该系统和外部系统、用户和通道间流动的信息是系统最基本的部分。
Information that flows between the system and the external systems, users, and channels is an essential part of your system.
我们将随后使用该密码文件的内容来调用将用户添加到外部系统的服务。
We will then use the contents of the password file to invoke a service that adds users to an external system.
信用卡信息要传递到外部系统，所以我们必须确保至少有一个有效号码。
Credit card information was to be passed to an external system, so we had to ensure we at least had a valid number.
其他外部系统可以处理这些操作，您将在本系列的后续部分中看到这一点。
Other external systems can process these actions, as you'll see in future parts in this series.
例如，涉及到复杂交付的外部系统的接口可能要求定义多个步骤或备选流。
For example, an interface to an external system that involves complex interaction may require several steps or alternative flows to be defined.
数据槽：外部系统用来存放要摄入的UMF 文件的一个临时存放区域。
Slot: a temporary holding area where external systems deposit UMF files for ingestion.
我们将对第3部分中使用的示例进行扩展，并对其加以增强，以调用外部系统。
We will expand the example we used in Part 3 and enhance it to call external systems.
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