  We show that moduli spaces of transversely cut-out (perturbed)
pseudo-holomorphic curves in an almost complex manifold carry canonical
relative smooth structures ("relative to the moduli space of domain curves").
The main point is that these structures can be characterized by a universal
property. The tools required are ordinary gluing analysis combined with some
fundamental results from the polyfold theory of Hofer--Wysocki--Zehnder.
