%0 Journal Article
%T SOME EXPLORATION ABOUT INTRODUCING A NEW RELATION IN RESEARCH OF DEDUCTIVE DATABASE SYSTEM<br>关于在演绎数据库系统研究中引入一种新的关系的一些探讨
%A Xu Jiepan
%A <br>徐洁磐
%J 软件学报
%D 1994
%I 
%X In this paper, a new relation called virtual-real relation in research of deductive database system has been proposed, virtual-real relation can integrate some advantage of real relation and virtual relation, overcome some disadvantage of them, it has a special character in DDBS. After introducing virtual-real relation to DDBS the authors can extend the function of DDBS. Now a virtual-real relation has been realized in DDBS -dUNIFY on SUN-3 workstation and is being applied to CAD and graphic fields.
%K Deductive database
%K virtual-real relation
%K dUNIFY<br>演绎数据库，虚－实关系，dUNIFY
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=7735F413D429542E610B3D6AC0D5EC59&aid=17D9C7A8B6133E87605F48748FEC0C82&yid=3EBE383EEA0A6494&vid=94C357A881DFC066&iid=59906B3B2830C2C5&sid=BCA2697F357F2001&eid=EA389574707BDED3&journal_id=1000-9825&journal_name=软件学报&referenced_num=0&reference_num=8