但服务用例不仅描述服务，而且还要描述如何调用该服务，因此协议是使用者和提供程序参与者之间的协定的一部分，必须在某个地方加以指定。
But a service use case describes not only a service but also how to invoke that service, so protocol is part of the contract between the consumer and provider actors and must be specified somewhere.
另一方面，服务描述文件提供了详细的指南，以便用户和计算机能够了解如何使用和处理该服务，并了解服务输出的预期内容。
On the other hand, the service description file provides detailed guidance for users and machines to understand how to use and process the service and what can be expected to get the service outcome.
特性包的版本说明和文档中将该服务称为BrowserDetection服务，但是最好将其描述为一个文件优化器服务。
The release notes and documentation for the feature pack might refer to this service as Browser Detection service, but it is better described as a file optimizer service.
服务定义描述了部署该服务的位置和对使用该服务的应用程序可用的操作。
The service definition describes where the service is deployed and the operations available to an application consuming the service.
这个描述文档为想要使用特定的服务来获取关于该服务的所有信息的客户端提供了一种标准方法。
This description document provides a standard way for clients wanting to consume a given service to obtain all the relevant information about the service.
当您突出显示不同的服务器环境时，该服务器环境的描述显示在面板底部。
A description of the different server environments display at the bottom of the panel when you highlight that server environment.
图书详细信息服务虽然在该场景中有用，但其WSDL描述并没有结构上的不同，因此本文将不介绍该服务。
The book details service, while useful in the scenario, doesn't have a structurally different WSDL description, so it's not covered in the article.
该服务的模式在接下来的图中进行了描述。
The schema of this service is depicted in the following figure.
服务接口是对该服务提供的操作的描述。
A service interface is a description of the operations provided by the service.
发现uddi中web服务的细节：查找提供服务的业务，然后查找描述该服务的WSDL文档的URL。
Discovers the web service's details from UDDI: finds the business providing the service and then the URL of the WSDL document describing the service.
您可能记得，在 第 5部分中，我们描述了名为 PackageTrackingService的服务，该服务可以传递关于特定服务的状态的信息。
You may remember that in Part 5, we described a service called PackageTrackingService, which could deliver information about the status of a particular service.
Web服务客户接着用HTTP从已知的URL请求该服务描述，服务描述以WSDL文档的形式提供。
The Web service client then requests the service description in the form of a WSDL document using HTTP from a known URL.
服务的Web服务描述语言(Web Services Description Language,WSDL)定义提供该服务的细节，包括端点、端口、操作和消息等。
A Web Services Description Language (WSDL) definition of a service provides the details of that service in terms of end point, ports, operations and messages.
然而，经常需要ES b来调用服务，该服务提供自我描述及发现的能力，这由Web服务帮助完成。
However, it is often desirable for an ESB to make the services it provides access to self-describing and discoverable, which Web services help to do.
请注意，对总线而言，服务名称来自于描述该服务的WSDL的service元素的name属性。
Note that, for the Bus, the service name comes from the name attribute of the service element of the WSDL describing the service.
请注意，对Axis来说，服务名称来自于描述该服务的WSDL的SOAPbinding元素的input元素的namespace属性。
Note that, for Axis, the service name comes from the namespace attribute of the input element in the SOAP binding element of the WSDL describing the service.
必需的服务规范（如果该服务如下列部分描述的那样，是一个组合服务，且属于某个协作的一部分）。
Required service specifications (when the service is a composite one and part of a collaboration, as described in the following section).
必需的服务规范（如果该服务如下列部分描述的那样，是一个组合服务，且属于某个协作的一部分）。
Required service specifications (when the service is a composite one and part of a collaboration, as described in the following section).
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