entity integrity

This paper takes XML as a public model and studies the conversion technology among heterogeneous relational database systems by means of reversible conversion between relational and XML, and this process keep on entity integrity constraints of source database.

所以本文研究以XML为公共模型，通过关系数据库与XML的可逆双向转换，建立异构关系数据源的统一转换工具。转换过程保留关系数据库的完整性约束。

Both entity integrity and referential integrity based on primary key are two important kinds of constraint.

求解关系模式的候选键是关系模型设计的基础，基于关键字的实体完整性和引用完整性是最基本的约束，也是最重要的约束。

Authentication ensures that only authorization users can access system. TNC architecture provides the open architecture for collect and exchange entity integrity data in variable network environments.

TNC架构提供了在不同种网络环境中采集和交换端点完整性数据的通用框架。

In Grid computing, how to assure the remote entity integrity is of greaf sense for grid security.

在网格计算中，如何认证远端实体的完整性状态，对于网格安全具有十分重要意义。

In the conversion process, it ensures the entity integrity of the data, domain integrity and referential integrity.

在转换过程中保证了数据的实体完整性、域完整性以及引用完整性。

The conversion process can retain the relational database's entity integrity constraint referential integrity constraint and most of customing integrity constraint.

转换过程可保留关系数据库的实体完整性约束、参照完整性约束和绝大部分的用户自定义完整性约束。

This article elaborated how to guarantee the data integrality of the database system, that is how to establishing the entity integrity, the domain integrity, the reference integrity, in the Visual Foxpro environment.

本文阐述在VISUAL FOXPRO中，如何保证数据库系统的数据完整性，即怎样设置实体完整性、域完整性、参照完整性。