%0 Journal Article
%T An Extended Multidimensional Data Model Supporting Non-Covering Dimensions<br>支持非覆盖维的扩展多维数据模型
%A LI Ze-Hai
%A SUN Ji-Gui
%A ZHAO Jun
%A YU Hai-Hong
%A <br>李泽海
%A 孙吉贵
%A 赵君
%A 于海鸿
%J 计算机科学
%D 2005
%I 
%X A new multidimensional conceptual model is proposed here based on current multidimensional models. The mapping from a parent level to one partition of a child level is defined to support irregular relationships among levels, such as non-covering and non-balanced relationships. Thus, the model can express the semantics of non-covering dimensions. Moreover, DAG is used to describe a dimensional hierarchy structure. The relationship between views and cubes is discussed explicitly, and the cube algebra and OLAP operation set are also defined. Especially, the transforming operations between dimensions and measures are also imported to enhance the analytical ability of the model.
%K Data warehouse
%K OLAP
%K Multidimensional data model
%K Non-covering dimension<br>数据仓库
%K 联机分析处理
%K 多维数据模型
%K 非覆盖维
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=9E17CEDD7B3186AB&yid=2DD7160C83D0ACED&vid=9971A5E270697F23&iid=9CF7A0430CBB2DFD&sid=A63576421B012172&eid=7F5DDA4924737DF5&journal_id=1002-137X&journal_name=计算机科学&referenced_num=0&reference_num=15