  We review the phenomenological framework for accessing Generalized Parton
Distributions (GPDs) using measurements of Deeply Virtual Compton Scattering
(DVCS) from a proton target. We describe various GPD models and fitting
procedures, emphasizing specific challenges posed both by the internal
structure and properties of the GPD functions and by their relation to
observables. Bearing in mind forthcoming data of unprecedented accuracy, we
give a set of recommendations to better define the pathway for a precise
extraction of GPDs from experiment.
