Difference between ECC5.0 and SAP 4.7 (ABAP developer point of view)

dear experts,
can anyone tell me the mian difference between ECC5.0 and SAP 4.7 from an abap developer view point.
thanks in advance

Hi,
From an ABAP perspective, there are not many changes, but addition of new classes, methods etc.
Please refer to the link - http://solutionbrowser.erp.sap.fmpmedia.com/
The above link tells about both of the versions.
For more information, you can refer to release notes of ECC 5.0.
Thanks,
Srinivas

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http://www.sap-img.com/abap/ale-bapi.htm
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