What Are Classes? A class is a set of objects that share the same attributes,operations,relationships, and semantics. In the UML,a class is represented by a compartmentalized rectangle. BuyerRecord (from Analysis Model) 色name:String address String ◆find buyer record ●create a new record0 get e-mail address0 Object Oriented Analysis and Design 3Object Oriented Analysis and Design 3 What Are Classes?  A class is a set of objects that share the same attributes, operations, relationships, and semantics.  In the UML, a class is represented by a compartmentalized rectangle