com.umlet.element.base.Note203023080Composition: A strong form of an aggregation. Describes the parts of an object and encapsulates it.com.umlet.element.base.Class25014010040Pagecom.umlet.element.base.Class2014010040Bookcom.umlet.element.base.Relation10014017040lt=<<<<- m1=1 m2=1..n20;20;150;20