计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (3): 155-157.DOI: 10.3778/j.issn.1002-8331.2009.03.046

• 数据库、信号与信息处理 • 上一篇    下一篇

XML弱函数依赖及单依赖集合研究

刘先锋1,李高仕1,黄海燕2   

  1. 1.湖南师范大学 数学与计算机科学学院，长沙 410081
    2.湖南科技学院 教务处，湖南 永州 425100
  • 收稿日期:2008-01-03 修回日期:2008-04-08 出版日期:2009-01-21 发布日期:2009-01-21
  • 通讯作者: 刘先锋

Research on weak functional dependencies and its mono-dependent set for XML

LIU Xian-feng1,LI Gao-shi1,HUANG Hai-yan2   

  1. 1.College of Mathematics and Computer Science，Hunan Normal University，Changsha 410081，China
    2.Office of Teaching Affairs，Hunan University of Science and Engineering，Yongzhou，Hunan 425100，China
  • Received:2008-01-03 Revised:2008-04-08 Online:2009-01-21 Published:2009-01-21
  • Contact: LIU Xian-feng

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摘要： XML弱函数依赖是在XML数据库中引入空值理论后的函数依赖。在空值、不完全树元组等概念的基础上，定义了弱函数依赖、单依赖集合，证明了单依赖集合判定定理和单依赖集合判定可终止定理。

Abstract: Weak functional dependency is a sort of functional dependency about XML database existed null value.In this paper，based on concepts of null value，incomplete tree tuple，the definitions of weak functional dependency，mono-dependent set are given，and the theorem of determine mono-dependent set and the terminate-able theorem of determine mono-dependent are proved.

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