| XML弱函数依赖及单依赖集合研究 |
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| 引用本文： | 刘先锋,李高仕,黄海燕.XML弱函数依赖及单依赖集合研究[J].计算机工程与应用,2009,45(3):155-157. |
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| 作者姓名： | 刘先锋 李高仕 黄海燕 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金，湖南省高校青年骨干教师培养计划，湖南省教育厅科学研究项目 |
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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。
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| 关 键 词： | 弱函数依赖 单依赖 空值 |
| 收稿时间： | 2008-1-3 |
| 修稿时间： | 2008-4-8
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Research on weak functional dependencies and its mono-dependent set for XML |
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| LIU Xian-feng,LI Gao-shi,HUANG Hai-yan.Research on weak functional dependencies and its mono-dependent set for XML[J].Computer Engineering and Applications,2009,45(3):155-157. |
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| Authors: | LIU Xian-feng LI Gao-shi HUANG Hai-yan |
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| Affiliation: | 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 |
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| 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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| Keywords: | weak functional dependency mono-dependent null value |
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