Head-driven phrase structure grammar: linguistic approach, formal foundations, and computational realization

The theoretical richness, formal rigor and computational versatility of Head-driven Phrase Structure Grammar (HPSG) preclude any kind of in-depth coverage of its content within the confines of an encyclopedia article such as this. Our objectives are accordingly far more modest: we seek to provide a kind of aerial view of the linguistic approach (§2), summarize the formal foundations (§3), and characterize computational work developed based on this paradigm (§4).