com.umlet.element.base.Note302029080Qualification: Choice of one entity from an n-relation. In the catalog the order number selects exactly one item.com.umlet.element.base.Relation11013026040lt=<- q1=order number m1=1..n m2=1 20;20;240;20com.umlet.element.base.Class35013010040Itemcom.umlet.element.base.Class3013010040Catalog