Joshua 3.0: syntax-based machine translation with the Thrax grammar extractor

Authors:
Jonathan Weese;Juri Ganitkevitch;Chris Callison-Burch;Matt Post;Adam Lopez
Affiliations:
Johns Hopkins University;Johns Hopkins University;Johns Hopkins University;Johns Hopkins University;Johns Hopkins University
Venue:
WMT '11 Proceedings of the Sixth Workshop on Statistical Machine Translation
Year:
2011

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Abstract

We present progress on Joshua, an open-source decoder for hierarchical and syntax-based machine translation. The main focus is describing Thrax, a flexible, open source synchronous context-free grammar extractor. Thrax extracts both hierarchical (Chiang, 2007) and syntax-augmented machine translation (Zollmann and Venugopal, 2006) grammars. It is built on Apache Hadoop for efficient distributed performance, and can easily be extended with support for new grammars, feature functions, and output formats.