DukesBirthdayBean is a stateless session bean that calculates the difference between the user's age and Duke's age.

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DukesBirthdayBean is a stateless session bean that calculates the difference between the user's age and Duke's age.

An analysis operation is used to represent the calculation and to hold Usage relationships to the age Properties.

Note also the re-use of source text «wrapper» Components from another text to clarify the analysis elements.