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Looking for an explaination of the n-tier program

xarzuxarzu Posts: 8Member

I have inherited an n-tier application and I would like some explanation of its way of grouping files.

I guess BAL is the BUSINESS ACCESS LAYER DAL is the DATA ACCESS LAYER

Any guesses for EAL? Anyone have any idea what EAL is?

Also, why would the file name content in the BAL be the same as the DAL?

http://i67.photobucket.com/albums/h292/Athono/01_zpsdeba4804.png

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