10 UMLClass 80 100 170 100 STUDENT -- snumber ID first-name last-name degree bg=#dddddd UMLClass 660 100 150 100 BOOK -- ISBN ID title publisher author bg=#dddddd Relation 240 130 150 50 lt=- m1=0..1 r1= m2=* Borrow > 10.0;20.0;130.0;20.0 UMLClass 370 120 160 50 BOOK-COPY -- call-number ID bg=#dddddd Relation 520 130 160 50 lt=- m1=* r1= m2= Is copy of 10.0;20.0;140.0;20.0