XML in Theory and Practice

Description :
Data. Probably the most important thing about any piece of software or computer system is the data that it manipulates. Whether playing games, using Internet chat rooms or performing financial transactions, everything that we use computers for has data somewhere near its heart. Data can be pretty complicated. You might think that your name and address are quite simple things, but try developing a computer storage format for them that is simple to use, efficient, that allows you to manipulate the data exactly as you want to, and that you will still understand in 20 years. Suddenly that simple data becomes more complex and interesting. Now scale the problem so that instead of data for one person you are storing and manipulating many millions of data records. If the data format is too complex, the system may struggle to work through the data when it is asked to make changes to it. If the format is too simple, important information may be difficult to extract.

Anyone who has used computers for a few years will have faced one particular problem. It doesn’t matter how much you know about IT or how much experience you have, you are almost guaranteed to face this problem at some point. The data that most PC users create is stored in proprietary formats. The software developers who create typical PC applications all invent their own data structures, and when a user saves data to a file it is stored in that unique format.

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