最近的趋势是定义表示可执行流模型(如用于Web服务的业务流程执行语言(Business Process Execution Language for Web Services, BPEL))的标准方法。
A recent trend is to define a standard way of representing executable flow models (for example, the Business Process Execution Language for Web Services (BPEL)).
表现力大多源于存在条件逻辑、动态更改输入模型和控制执行流的标签。
Much of the expressiveness comes from there being tags for conditional logic, dynamically changing the input model, and controlling the flow of execution.
此中介流组件（图 4）执行请求者数据模型与提供者数据模型间的映射，并且还可以针对诊断或审计的目的进行进一步的日志记录。
The mediation flow component (Figure 4) performs a mapping of the requestor's data model to that of the provider, and perhaps performs some further logging for diagnostics or auditing purposes.
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