  To understand the structure of hadrons and their production mechanisms, it is
very important to be able to identify their quantum numbers. For investigating
the spin and parity quantum numbers of $\Xi$ and $\Omega$ baryons, in
particular, it is very important to understand strong interactions in the
strangeness sector. At present, such quantum numbers are known for only a few
of the $\Xi$ baryons, and even the parity of the ground state $\Xi(1318)$ has
never been measured. In this article, we present a novel, model-independent way
to determine the parity of $\Xi$ baryons solely based on symmetry
considerations for the hadronic reaction $\bar{K} N \to K \Xi$.
