Post Conference Tutorial
XLE and XFR: A Grammar Development Platform with a Parser/Generator and Rewrite System
Tracy Holloway King
This tutorial provides an introduction to writing
large-scale, robust grammars with XLE, a grammar development platform designed
by PARC (
The tutorial will be organized as follows. First, we discuss the process of building a grammar: the formulation of rules, the integration of lexicons and finite-state morphological analyzers, and the use of templates to capture generalizations. We then discuss the use of several robustness techniques: FSM guessers, the fragment grammar, and optimality theory (OT) marks. During the second half of the tutorial, we discuss reversing the grammar for generation, the integration of stochastic methods for disambiguation and the use of the rewrite system for transfer and knowledge representation. Finally, we briefly outline how such grammars can be used in applications like machine translation, sentence condensation, question-answer systems and computer assisted language learning.