作业帮请帮忙翻译一下,有点难度
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请帮忙翻译一下,有点难度
This paper deals with these different forms of heterogeneity, fitting together previous
work done in this area . First, an in-depth analysis of data model heterogeneity is
provided by comparing concepts available in RDBS and XML schema specification languages, comprising XML DTD and XML Schema . Second, basic kinds of mappings between XML concepts and relational concepts are presented and reasonable mappings in terms of mapping patterns are determined to mediate between the different structuring mechanisms supported by XML and RDBS. Third, design alternatives for integrating XML and relational database systems are examined and X-Ray, a generic approach for integrating XML with relational database systems is proposed. An extensive evaluation of existing approaches closely related toX-Ray is presented in Section 6. Finally, Section 7 concludes the paper with a summary and gives an outlook to future work.
This paper deals with these different forms of heterogeneity, fitting together previous
work done in this area . First, an in-depth analysis of data model heterogeneity is
provided by comparing concepts available in RDBS and XML schema specification languages, comprising XML DTD and XML Schema . Second, basic kinds of mappings between XML concepts and relational concepts are presented and reasonable mappings in terms of mapping patterns are determined to mediate between the different structuring mechanisms supported by XML and RDBS. Third, design alternatives for integrating XML and relational database systems are examined and X-Ray, a generic approach for integrating XML with relational database systems is proposed. An extensive evaluation of existing approaches closely related toX-Ray is presented in Section 6. Finally, Section 7 concludes the paper with a summary and gives an outlook to future work.
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原文：
This paper deals with these different forms of heterogeneity,fitting together previous
work done in this area .First,an in-depth analysis of data model heterogeneity is
provided by comparing concepts available in RDBS and XML schema specification languages,comprising XML DTD and XML Schema .Second,basic kinds of mappings between XML concepts and relational concepts are presented and reasonable mappings in terms of mapping patterns are determined to mediate between the different structuring mechanisms supported by XML and RDBS.Third,design alternatives for integrating XML and relational database systems are examined and X-Ray,a generic approach for integrating XML with relational database systems is proposed.An extensive evaluation of existing approaches closely related toX-Ray is presented in Section 6.Finally,Section 7 concludes the paper with a summary and gives an outlook to future work.
翻译：
本文论述了这些不同形式的异质性,fi一起坐在这方面所做的工作.首先,数据模型的异质性,通过比较的概念在关系数据库和XML Schema规范fi阳离子语言提供了深入的分析,包括XML DTD和XML Schema.第二,介绍了XML的概念和关系的概念之间的映射的映射模式的基本类型和合理确定不同的结构映射到XML与关系数据库之间的机制介导的支持.第三,结合XML和关系数据库系统的设计方案进行检查和X射线,提出了XML与关系数据库系统集成一个通用的方法.现有的方法密切相关的TOX射线广泛的评价在6节.最后,7部分总结全文,总结并展望了未来的工作.
原文：
This paper deals with these different forms of heterogeneity,fitting together previous
work done in this area .First,an in-depth analysis of data model heterogeneity is
provided by comparing concepts available in RDBS and XML schema specification languages,comprising XML DTD and XML Schema .Second,basic kinds of mappings between XML concepts and relational concepts are presented and reasonable mappings in terms of mapping patterns are determined to mediate between the different structuring mechanisms supported by XML and RDBS.Third,design alternatives for integrating XML and relational database systems are examined and X-Ray,a generic approach for integrating XML with relational database systems is proposed.An extensive evaluation of existing approaches closely related toX-Ray is presented in Section 6.Finally,Section 7 concludes the paper with a summary and gives an outlook to future work.
翻译：
本文论述了这些不同形式的异质性,fi一起坐在这方面所做的工作.首先,数据模型的异质性,通过比较的概念在关系数据库和XML Schema规范fi阳离子语言提供了深入的分析,包括XML DTD和XML Schema.第二,介绍了XML的概念和关系的概念之间的映射的映射模式的基本类型和合理确定不同的结构映射到XML与关系数据库之间的机制介导的支持.第三,结合XML和关系数据库系统的设计方案进行检查和X射线,提出了XML与关系数据库系统集成一个通用的方法.现有的方法密切相关的TOX射线广泛的评价在6节.最后,7部分总结全文,总结并展望了未来的工作.