If I have a supertype and a subtype in one entitycollection (version 1.0.2005) and I bind this entitycollection to a Janus grid, is there a way to make it show all the columns, but default values for fields which don't exist in the supertype?

EDIT: There is no problem doing this. If the Janus grid cannot find a specific property for an entity, it ignores that property and puts a default value in that cell.