文章基本信息

标题：Functional Dependencies with Counting on Trees
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作者：K.-D. Schewe
期刊名称：Journal of Universal Computer Science
印刷版ISSN：0948-6968
出版年度：2005
卷号：11
期号：12
页码：2063-2063
出版社：Graz University of Technology and Know-Center
摘要：The paper presents an axiomatisation for functional dependencies on trees that are defined using constructors for records, lists, sets and multisets. A simple form of restructuring permitting lists to be mapped onto multisets and multisets onto sets is added to the theory. Furthermore, the theory handles dependencies on sets treated as multisets. This adds the possibility to use the count of elements in the dependencies.
关键词：axiomatisation, complex value databases, counting attributes, functional dependencies