  Quantum number descriptions of spin-zero mesons are obtained from their
quark/anti-quark structures, extending the application of the already
established seven quantum number conservation in fermion interactions to
include mesons. This provides a new tool in the design of experiments and the
analysis of results, making it particularly useful for those interactions that
involve neutral mesons. One quantum number is parity, conflicting with the
evidence for parity non-conservation. The source of this disagreement is
identified as the poor definition of parity in the Standard Model. It is also
shown that mesons can produce inter-generational interactions, providing a
viable alternative to the see-saw mechanism of neutrino interactions.
