The Head-Driven Phrase Structure Grammar (HPSG) is a grammar theory developed by Pollard and Sag (1985). It uses a uniform formalism and is organized in a modular way which makes it attractive for Natural language processing.
... from 1559 until the Edict of Nantes (1598), the effect of which was to establish regions in which Protestants could live unmolested. These areas became centers of ...