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Sams Teach Yourself J2EE™ in 21 Days by Peter Roxburgh, Andy Longshaw, Debbie Law, Dan Haywood, Martin Bond

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The Drive to Platform-Independent Data Exchange

Applications essentially consist of two parts—functionality described by the code and the data that is manipulated by the code. The in-memory storage and management of data is a key part of any programming language and environment. Within a single application, the programmer is free to decide on how the data is stored and represented. Problems start when the application must exchange data with another application.

One solution is to use an intermediary storage medium, such as a database, and standard tools, such as SQL and JDBC, to gain access to the data in such databases.

But what if the data is to be exchanged directly between two applications, or the applications cannot access the same database. ...

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