  We consider Open Gromov-Witten invariants for noncompact Calabi-Yau in the
case the Lagrangian has the topology of $\R^2 \times S^1$. The definition of
the invariant involves the choice of a frame for the Lagrangian, in accord with
string theory.
  Our result applies to the examples arising from Large $N$-duality. In
particular it leads to knot and link invariants counting holomorphic curves.
