Value propogation in verb and adjective narratives

We have relations like

A -v-> B

and

A _v/ B

The question is: how do the values associated to A, v, and B become a value for the whole expression? Let 0=bad and 1=good, we can write rules like the following.
Always ignore the value of A and use:

value( A -v-> B ) = value(B) + value(v) +1

value( A _v/ B ) = value(A)*value(B)

For fun you can write:

1 - val( A-v->B) = val(A) + val(B)

     val( A _v/ B ) =val(A) * val(B)

Also, it think we should use:

val( A, B) = val(B) 

and

val(A::B)=val(B)