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.
外观模式：提供了一个统一的接口，用来访问子系统中的一群接口。外观定义了一个高层接口，让子系统更容易使用。
The Facade pattern:provides a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use.
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.
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.
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.
硬件抽象层利用底层微内核提供的API对底层硬件和外设进行访问和控制，提供一个抽象硬件平台和统一的硬件接口。
We provided an abstract hardware platform and a unified hardware interface by the use of the underlying microkernel APIs for the underlying hardware and peripherals to access and control.
硬件抽象层利用底层微内核提供的API对底层硬件和外设进行访问和控制，提供一个抽象硬件平台和统一的硬件接口。
We provided an abstract hardware platform and a unified hardware interface by the use of the underlying microkernel APIs for the underlying hardware and peripherals to access and control.
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