Dependence on a subspace - Possible???

Question

Going through the Kaluza-Klein examples, I noticed that it is possible to define subspaces (e.g. split_index). There is also a Depends property.

I've defined

{\Lambda,\Theta,\Sigma,\Xi,\Gamma,\Delta,\Pi,\Omega}::Indices(full,position=independent);
{\mu,\nu,\rho,\sigma,\gamma,\lambda}::Indices(space1,position=independent);
\partial{#}::PartialDerivative;
{\phi, A_{\mu?}, h_{\mu? \nu?}}::Depends(\partial{#});

Is it possible to restrict the dependence of the fields to the subspace space1?