Data Reverse Engineering (DRE)
Reverse Engineering is the process of reconstructing a physical and/or ER model from an existing schema.
Reverse Engineering can be used to:Provide documentation on an existing application
Provide applications developers with a better overall picture of the schema
Provide a better guideline when performing changes to the schema.
This is not a trivial process since during the initial conversion from ER to Relational model, some information is lost.
For example, a Many to Many (M:N) relationship is represented as an intersection relation.
Also, the names of the relationships are lost.Continue Reading....
From Holowczak.com
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