  We derive a canonical formalism for the hydrodynamic representation of the
Gross-Pitaevskii field (nonlinear Schr\"odinger field), where the density and
the phase of the condensate form a canonical pair of conjugate field variables.
To do so, we treat the meanfield as a singular Lagrangian system and apply both
the Dirac-Bergmann and Faddeev-Jackiw methods. The Faddeev-Jackiw method is
found to be a more direct approach to the problem.
