Java <a href="http://www.setgetweb.com/p/j2sdk141/serialization/spec/serial-arch.doc1.html">Object Serialization</a> Specification: 5 - Versioning of <a href="http://www.setgetweb.com/p/j2sdk141api/java/io/Serializable.html">Serializable</a> Objects

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5.2 Goals

The goals are to:

Support bidirectional communication between different versions of a class operating in different virtual machines by:

Defining a mechanism that allows Java classes to read streams written by older versions of the same class.

%" ALIGN="LEFT" VALIGN="BOTTOM"> - ALIGN="LEFT" VALIGN="BOTTOM">Defining a mechanism that allows Java classes to write streams intended to be read by older versions of the same class.

Provide default serialization for persistence and for RMI.
Perform well and produce compact streams in simple cases, so that RMI can use serialization.
Be able to identify and load classes that match the exact class used to write the stream.
Keep the overhead low for nonversioned classes.
Use a stream format that allows the traversal of the stream without having to invoke methods specific to the objects saved in the stream.

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