Modeling Subject Areas

You could use shapes to model the subject areas. Have the shapes contain the tables/objects you want and then you can use the line shape to show relationships.

Another option would be to use Business Data Objects. Use the Business Data objects as your containment and then have tables within it. The benefit of this is that you can minimize the BDO and still see the relationships going out.

Regards,
Stan

I know I can contain entities within a business object but don't seem to be able to contain a business object within a business object. Looking to have a Major Subject Area that contains a Minor Subject Area that contains entities structure.

You are correct in that you cannot contain a BDO within a BDO. You'd have to use a shape as your Major Subject Area to contain the BDO.

One more really dumb question. Is there a way to specify that containment in the properties? Or is it just put the BDO over the shape?

are you talking about the Shape containing the BDO? If you right click on the shape, you can choose containment -> enable and anything you put on the shape should be contained there. So when you move the shape, everything in it will move with the shape.

Many thanks!