The paper gives a verification of the soundness and performance analysis of this Web services composition model based on SPN-NET.
文中给出了基于SPN - NET模型的服务组合合理性验证和性能分析方法。
Web service composition can be divided into two classes, narndy centralized architecture and decentralized architecture, by the location of the Web services composition engine.
组合服务按照其引擎分布可分为：集中式服务组合和分布式服务组合。
Policy sets provide reusable quality of service configurations, which can be associated with the SCA Web services bindings defined in a composition unit.
策略集提供可重用的服务质量配置，这些配置可以与组合单元中定义的SCAWeb服务绑定相关联。
The involved web services do not know (and do not need to know) that they are involved into a composition and that they are a part of a higher business process.
所涉及的Web服务并不知道(也不需要知道)它们所涉及到的组合，它们只是一个更高的业务流程的一部分。
In order for this composition to occur, we need a way of composing atomic, fine-grained Web services into coarse-grained business services.
为了使这个组成发生，我们需要有一种方式的组成原子，细粒度网络服务纳入粗粒度的业务服务。
The Business Process Execution Language for Web Services (BPEL4WS) represents the merging of WSFL and XLANG, and with luck, will become the basis of a standard for web service composition.
Web服务的业务流程执行语言（BPEL4WS）是WSFL和XLANG 融合的产物，如果运气好的话，它将成为 Web服务整合标准的基础。
BPEL allows composition of web services and is thus the top-down approach to SOA -the process oriented approach to SOA.
BPEL允许Web服务的组合，是自上而下的、基于过程的SOA方法。
In this article, we focus on the implementation technology of SOA and web services base on in-depth studying about the basic theory, composition elements, core technology and programming of SOA.
本文在深入研究了SOA的基础理论、组成元素、核心技术和编程思想的基础上，重点研究了SOA的实现技术以及Web服务的实现过程。
In this article, we focus on the implementation technology of SOA and web services base on in-depth studying about the basic theory, composition elements, core technology and programming of SOA.
本文在深入研究了SOA的基础理论、组成元素、核心技术和编程思想的基础上，重点研究了SOA的实现技术以及Web服务的实现过程。
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