东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (1): 57-60.DOI: -

• 论著 • 上一篇    下一篇

XML的函数依赖

赵相国;王国仁;韩东红;丁大斌;   

  1. 东北大学信息科学与工程学院;东北大学信息科学与工程学院;东北大学信息科学与工程学院;东北大学信息科学与工程学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-01-15 发布日期:2013-06-22
  • 通讯作者: Zhao, X.-G.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(60573089);;

Function dependencies in XML

Zhao, Xiang-Guo (1); Wang, Guo-Ren (1); Han, Dong-Hong (1); Ding, Da-Bin (1)   

  1. (1) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-01-15 Published:2013-06-22
  • Contact: Zhao, X.-G.
  • About author:-
  • Supported by:
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摘要: 为了表达引起数据冗余的XML函数依赖,研究了XML中存在的复杂的多种形式的函数依赖约束,提出了一种DTD的路径语言,对于导航和定位XML文档的内容具有较强的表达能力.提出了一套XML模式及文档的形式化描述方法,进而提出了一种XML函数依赖(XFD)的定义.与以前的XML函数依赖的定义进行比较,展示了XFD可以表达更多的XML上存在的函数依赖,可以概括以前的基于路径表达式定义的XML函数依赖的约束能力.

关键词: XML, 函数依赖, 规范化, 路径语言, 数据约束

Abstract: Functional dependency is an integral part in the normalization research on XML data base. To express the XML functional dependency which give rise to data redundancy, various complicated constraints on functional dependency are analyzed with a path language proposed on DTD basis to give stronger expression to the navigation and location for an XML document. With a set of XML schemes and representation to formalize documents presented, a kind of definition of XML functional dependency (XFD) is given. Comparing with the XFD defined previously, this definition of XFD can express more functional dependencies existing in XML and is available to generalize about the constrainabilities on the functional dependencies defined before by the expression of path.

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