  A concise formulation for mixed-symmetry gauge fields on AdS space is
proposed. It is explicitly local, gauge invariant, and has manifest AdS
symmetry. Various other known formulations (including the original formulation
of Metsaev and the unfolded formulation) can be derived through the appropriate
reductions and gauge fixing. As a byproduct, we also identify some new useful
formulations of the theory that can be interesting for further developments.
The formulation is presented in the BRST terms and extensively uses Howe
duality. In particular, the BRST operator is a sum of the term associated to
the spacetime isometry algebra and the term associated to the Howe dual
symplectic algebra.
