This paper aims to associate the development of formal grammars under Lexicalist Hypothesis and requirements of NLP systems. Structured lexicons and formal grammars are required to NLP systems. This work is supported by the development of HPSG model. Since its inception HPSG has been conceived as a formal theory involved with formal descriptions and implementations of linguistic phenomena. Nowadays, HPSP engagement with NLP is reinforced by its implementations for many languages.
Lexicon; NLP; HPSG
