(第4空)Unified Modeling Language (UML) is a widely used method of visualizing and documenting an information system. The UML can be used to develop ( ) ,in which an object represents a
person, place, event, or transaction that is significant to the information system. Systems analysts define an object’s attributes during the ( ).An object also has ( )，which are tasks or functions that the object performs when it receives a message, or command, to do so. A(n) ( ) is a group of similar objects. If objects are similar to nouns, attributes are similar to adjectives that describe the characteristics of an object. Objects can have a specific attribute called a(n) ( ), which of an object is an adjective that describes the object's current status. All objects within a class share common attributes and methods, so a class is like a blueprint, or template for all the objects within the class.