2. A method according to claim 1, wherein the step of performing a series of transformation includes operations such as retain, duplicate, merge, constrain, and restrict.
2. A method according to claim 1, wherein the step of performing a series of transformation includes operations such as retain, duplicate, merge, constrain, and restrict. 3. A method according to claim 2, wherein the retain operation retains classes and associations that are to be included in the specification of the query.