We were discussing SDD and interface diagrams (Rapid specific with our own notation ) .
The basic is as in image these 2 images:
Some of us think we can show more detail as in these 3 :
Basically here we see that we can have many views as in 3addingDetailVA.gif and 4addingDetailVB.gif .
This also shows how not all exported fns need to be denoted - only relevant between those objects.