Parsing with HPSG

6.863 Final Project - May 2005

Alex Gruenstein

The goal of this project was to investigate the issues that arise when computationally implementing a well-developed syntactic/semantic theory. I have implemented a subset of the Head-driven Phrase Structure Grammar (HPSG) articulated in: Ginzburg and Sag, Interrogative Investigations, CSLI Publications, 2000. On this page I give pointers to a paper describing my project, as well as the grammar I wrote. This is the complete grammar, and can be loaded into the LKB.

A complete description of the project: writeup.pdf or writeup.ps

The complete grammar (surely filled with bugs, and woefully incomplete):

types.tdl Fundamental and phrase types
ltypes.tdl Lexical types
lexicon.tdl The lexicon
rules.tdl Parsing rules
start.tdl Distinguished top-level start phrase constraints
parse-nodes.tdl Labels used for parse nodes
user-fns.lsp I didn't write these, they are just stolen from an example provided with the lkb
user-prefs.lsp User preferences (also mostly stolen)
globals.lsp Global variable settings (also mostly stolen)
script The script to load the complete grammar in the LKB