Thanks Sridhar ,
Very help ful suggestions .I checked
rose and see the package notations so I am now adding that and cleaning up my class diagram which was looking ugly with all the lines crossing over.
On a similar line for component diagram when I represent the subsystem with package ,do I need to show components inside the package diagram.
I checked and rose does support that feature but I am not sure if that is the correct norm to use to depict the components embedded inside a packaged subsystems. Cade doesnt show components inside a subsystem in the component diagram.
Thanks for your help.
Dhiren