10 UMLClass 230 110 180 70 BOOK-COPY -- library ID call-number ID bg=#dddddd UMLClass 630 100 190 100 BOOK-DESCRIPTION -- ISBN ID title publisher authors[0..*] bg=#dddddd Relation 400 130 250 50 lt=- m1=* r1= m2= Has > 10.0;20.0;230.0;20.0