  We propose a transformation for spin and charge degrees of freedom in
one-dimensional lattice systems, constrained to have no doubly occupied sites,
that allows direct access to the dynamical correlations of the system. The
transformation delivers particle creation and annihilation operators in a form
of a spinless particle and a non-local operator acting on the space of states
of a spin-$1/2$ chain. This permits a decomposition of dynamical correlation
functions as a convolution of those for impenetrable anyons together with those
of a spin chain. Further analysis can be done by methods tailored for each part
of the convolution, greatly increasing the impact and flexibility of the
approach.
