第一层是介于数据访问层和用户之间的中间层，主要是组织数据和调用数据访问中间件。
The first layer is between client application and data access middleware, which is designed for organizing data and calling data access functions of middleware.
功能存根，当它被调用时，访问一个中间件层，该层向被调用的应用程序传输调用及其相关的数据。
The function stub, when called, accesses a middleware layer that transports the call and its associated data to the invoked application.
数据治理：对于SOA方法，服务支持中间件提供了审核和控制服务访问的控制点和内置功能。
Data governance: With the SOA approach, the service enablement middleware provides control points and built-in capabilities to audit and control access to services.
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