Ivan,

I like to keep my rule class seperate from the CDE, and will usually create a seperate rule class for each table. When I have the CDE open for modifications I can simply drag and drop the rule from the project manager to the CDE. Note that you may add as many rule classes as you would like to the data environment. You may also add the rule to one of the cursor objects within the data environment.

Hope this helps you out,
- Joel