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Identifying Attributes
Operations are behaviour shared by all instances of a class. They are actions carried out by,or on an object.
The operations are triggered by the receipt of an object.
A sequence of message sending is initiated by an actor that requires some function by the system.
Operations are services that an object may be asked to carry out by other objects.
For example: Operations to create/destroy class instances or create/modify attributes,get/set data.
