%0 Journal Article
%T A comparison of closed world assumptions<br>A Comparison of Closed World Assumptions
%A Yidong Shen
%A <br>Shen
%A Yidong
%J 计算机科学技术学报
%D 1992
%I 
%X In this paper, we introduce a notion of the family of closed world assumptions and compare several well-known closed world approaches in the family to the extent to which an incomplete database is completed.
%K 演绎数据库
%K 数据查询
%K 封闭世界假设比较
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=F57FEF5FAEE544283F43708D560ABF1B&aid=B68AE62DB7B81D3D63BBC5C678085FC1&yid=F53A2717BDB04D52&vid=DF92D298D3FF1E6E&iid=38B194292C032A66&sid=B78CD622C1934236&eid=28F9D9CF04F424FF&journal_id=1000-9000&journal_name=计算机科学技术学报&referenced_num=0&reference_num=9