  We demonstrate the utility of point group representation theory for symmetry
analysis in resonant inelastic x-ray scattering. From its
polarization-dependence, we show that a 5 eV inelastic feature in Sr2CuO2Cl2
has pure B1g symmetry and assign it to a transition in the cell-perturbation
calculations of Simon, et. al. [Phys. Rev. B., 54, R3780 (1996)]. We discuss
how Raman selection rules are broken at nonzero momentum transfer and how this
can also act as a probe of wave function symmetry.
