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What is Meta data in J2EE Web Application?

 
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Hello Friends,

i come to listen this word 'Meta data' so many times for an J2EE Application but i didn't know what it is yet? I also know that If we extract this Meta data file than we got more important data from it but i even don't know that what data it contains basically in an Application?

Please help me to understand this.

regards,
Sunil
 
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Well, our Oracle says about meta data in simple few lines

Data about data. The goal of JSR-175 was to provide metadata facilities in the Java language.


and Wikipedia also says pretty much same

As usual I got a headache by reading Oracle documentation and wiki. You can follow this if you are not unlike me
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