如何访问不同数据源类型的数据在IT业界变得越来越重要，SDO是一种应用程序编程接口(API)，可以简化和统一对异构数据的访问。
SDO is an API (application programming interface) that helps simplify and unify data access across different data source types, which is becoming more and more crucial in the IT industry.
XQJ是一个通用的XQuery数据访问框架，它在许多不同的XQuery实现之上提供了一个统一的接口。
XQJ is a generic XQuery data access framework, which provides a uniform interface on top of a variety of different XQuery implementations.
PDO并不是类似于PearDB的数据库抽象层，而更像一种采用了统一api(应用编程接口)的数据访问层。
PDO is not an abstraction layer like PearDB. PDO is a more like a data access layer which USES a unified API (Application Programming Interface).
异构数据集成系统的目的是提供一个访问异构数据源的统一接口。
The purpose of data integration is providing a standard interface for visiting heterogeneous data sources.
数据集成是为了屏蔽数据的异构性，以一种统一的接口访问数据源中的数据。
Data integration is to shield the heterogeneity, to provide a uniform interface to a multitude of data sources.
网格数据管理模块需要屏蔽底层数据源差异，为用户提供统一访问接口，并且还要保证访问的可靠性和安全性。
Grid data management module should hide the heterogeneity of data resources, provide uniform access interfaces, and make sure of the reliability and security of data access.
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。
SDAI is the standard data access interface adopted by STEP, it aims to provide a uniform data access interface standard between different systems.
DAI结构打算为一般性的数据访问和集成服务定义OGSA 接口类型，以便成为不同的数据源访问的统一接口。
The OGSA-DAI is to define OGSA portType for generic data access and integration services, in order to present uniform access to a wide range of data sources.
OPC技术规范是OPC基金会制定的，它提供了统一的数据访问软硬件接口。
OPC technology specification is established by OPC foundation, which provides unitive data accessing software and hardware interface standard.
OPC技术规范是OPC基金会制定的，它提供了统一的数据访问软硬件接口。
OPC technology specification is established by OPC foundation, which provides unitive data accessing software and hardware interface standard.
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