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Question about Mikalai Zaikin Chapter 6

 
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It says:

"The following are the requirements for a dependent value class:

The class MUST be defined as public and MUST NOT be abstract.

The class MUST be SERIALIZABLE."

What is a dependent value class? Is it same as Primary Key class?

Thanks
Deep
 
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The Link will help Dependent value class explanation

Dependent value class is related to the design pattern TransferObject.
 
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