  Coupling hadronic kinetic theory models to fluid dynamics in phenomenological
studies of heavy ion collisions requires a prescription for ``particlization''.
Existing particlization models are based on implicit or explicit assumptions
about the microscopic degrees of freedom that go beyond the information
provided by the preceding fluid dynamical history. We propose an alternative
prescription which uses only macroscopic information provided by the
hydrodynamic output. This method follows directly from the connections between
information theory and statistical mechanics.
