10 UMLClass 90 60 150 100 BOOK -- isbn# ID title price anthor-name[1..*] bg=#dddddd UMLClass 90 220 150 90 BOOK -- isbn# ID title price bg=#dddddd UMLClass 430 240 160 50 AUTHOR -- author-name ID bg=#dddddd Relation 230 240 220 50 lt=- m1=1..* r1= m2=1..* Is-written-by 10.0;20.0;200.0;20.0 UMLClass 650 60 160 100 STUDENT -- snum ID first-name last-name mobile[1..*] bg=#dddddd UMLClass 990 240 160 50 MOBILE-PHONE -- number ID bg=#dddddd Relation 800 240 210 50 lt=- m1=1 r1= m2=1..* Owns 10.0;20.0;190.0;20.0 UMLClass 650 220 160 100 STUDENT -- snum ID first-name last-name mobile-phone[1..*] bg=#dddddd