LFG and HPSG

This chapter presents and compares Lexical Functional Grammar and Head-driven Phrase Structure Grammar. It concentrates on their fundamental properties rather than on analyses of particular phenomena. After discussing representations assumed in each theory and the kinds of grammars that lead to such representations, the chapter devotes some attention to models explicitly or implicitly assumed in HPSG and LFG\@: it identifies some problems and suggests possible solutions.