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Drawing arcs on ER diagrams

From: Liz J <thejordanschangethistoanatsignclara.net>
Date: Tue, 17 Oct 2006 22:08:52 +0100
Message-Id: <1161119329.22375.0@proxy02.news.clara.net> 





Hi



I am learning about arcs on a ER diagram.  Please could someone explain the 
significance of the circles that are on some of the arcs but not others?



thanks



Liz 
Received on Tue Oct 17 2006 - 16:08:52 CDT












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