Joshua 4.0: Packing, PRO, and Paraphrases
Juri Ganitkevitch, Yuan Cao, Jonathan R. Weese, Matt Post, Chris Callison-Burch · 2013
We present Joshua 4.0, the newest version of our open-source decoder for parsing-based statistical machine translation. The main contributions in this release are the introduction of a compact grammar representation based on packed tries, and the integration of our implementation of pairwise ranking optimization, J-PRO. We further present the extension of the Thrax SCFG grammar extractor to pivot-based extraction of syntactically informed sentential paraphrases. 1