  In this paper, we characterize the properties of a direct interpretation of
HPSG and present the advantages of this approach. High-level programming
languages constitute in this perspective an efficient solution: we show how a
multi-paradigm approach, containing in particular constraint logic programming,
offers mechanims close to that of the theory and preserves its fundamental
properties. We take the example of LIFE and describe the implementation of the
main HPSG mechanisms.
