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.
... paternal name was Hemerken or Hammerlein, "little hammer."
In 1395 he was sent to the school at Deventer
conducted by the Brethren of the Common Life[?].
He became ...