  Comparisons of the positive and negative halves of the distributions of
parity-odd event variables in particle-physics experimental data can provide
sensitivity to sources of non-standard parity violation. Such techniques
benefit from lacking first-order dependence on simulations or theoretical
models, but have hitherto lacked systematic means of enumerating all
discoverable signals. To address that issue this paper seeks to construct sets
of parity-odd event variables which may be proved to be able to reveal the
existence of any Lorentz-invariant source of non-standard parity violation
which could be visible in data consisting of groups of real non space-like
four-momenta exhibiting certain permutation symmetries.
