Question about rmap and automap and boundary condition
 

As I try to make boundary condition that use scalarField and can run in parallel I'd like to ask some question !

As it seams that rmap and automap are essential to boundary condition that use scalarField in parallel simulation:

What exactly rmap do ?
And what automap do ?

As some boundary condition ave a lot of template<class Type> definition:

How may I chose a good BC to start my modification ?

If too boundary condition ave the same grand mother class shouldn’t I be suppose to be able to use the same syntax for virtual function?

And finally. What is the role of template in this case ??

Regards