Unified Modeling Language（UML） is a widely used method of visualizing and documenting an information system. The UML can be used to develop  （1） ， 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  （2） . An object also has  （3） ， which are tasks or functions that the object performs when it receives a message，or command， to do so. A（n）  （4）  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）  （5）， 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.

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