SDAI is the standard data access interface adopted by STEP, it aims to provide a uniform data access interface standard between different systems.

SDAI是STEP采用的标准数据访问接口，是针对不同的数据存贮技术而提供的统一的数据存取接口标准。

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SDAI is the standard data access interface adopted by STEP, It aims to provide a uniform data access interface standard be-tween different systems.

SDAI是STEP采用的标准数据存取接口，是针对不同的数据存贮技术而提供的统一的数据存取接口标准。

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The basic structure of OPC and the standard of data access are researched in the paper. The automation interface object model is analyzed.

研究了OPC的基本结构和数据访问标准，重点分析了自动化接口的对象模型。

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Through use of a standard data protocol, OData, Microsoft offers a well-defined web interface for data access, including queries.

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