XMG: eXtensible MetaGrammar Benoît Crabbé author Denys Duchier author Claire Gardent author Joseph Le Roux author Yannick Parmentier author 2013-09 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal crabbe-etal-2013-xmg 10.1162/COLI_a_00144 https://aclanthology.org/J13-3005/ 2013-09 39 3 591 629