  We present an implemented compilation algorithm that translates HPSG into
lexicalized feature-based TAG, relating concepts of the two theories. While
HPSG has a more elaborated principle-based theory of possible phrase
structures, TAG provides the means to represent lexicalized structures more
explicitly. Our objectives are met by giving clear definitions that determine
the projection of structures from the lexicon, and identify maximal
projections, auxiliary trees and foot nodes.
