data access and Exchange 数据存取与交换
Business rules are centralized into the business logic layer that serves as an intermediary for data exchange between the presentation layer and the data access layer.
业务规则可以集中到业务逻辑层，该层充当表示层和数据访问层之间的数据交换的中间层。
The Simple Object Access Protocol (SOAP) is actually a Web services technology, but the format of data exchange between the client and the server in the Web service is through a flexible XML schema.
简单对象访问协议(Simple Object Access Protocol, SOAP)实际上是一种Web服务技术，但Web服务中客户机和服务器之间的数据交换格式是通过灵活的XML模式实现的。
According to the characteristics of large amount of data collection and exchange in the smart city, the paper focuses on the protection mechanism of access control.
根据智慧城市大量数据采集和交换的特点，重点实现访问控制的防护机制。
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