The label URI was set to the default auto-generated value, which broke the item provider code getText() method. It's now using the createRelashionshipEdgeLabelURI(...) method instead git-svn-id: http://dev.eclipse.org/svnroot/technology/org.eclipse.stem/trunk/data@2282 92a21009-5b66-0410-b83a-dc787c41c6e9