GraphExplorer Nodes as TreeNodes

Hi 
I am trying to visualize my db schema the way a schema diagram looks like. is it possible to have subnodes inside a  Graph Node which are not visibly conncted via an edge.  

PRODUCT
 - name
 - size
 - company  <----------Visible Edge-----------> COMPANY
                                                                      - name
                                                                      - size

Also the attributes should be selectable, for instance I should be able to select PRODUCT/name and perform some operation

At the moment, I am able to achieve what is shown in the image attached 

thanks
Chahat