Augmenting String-to-Tree and Tree-to-String Translation with Non-Syntactic Phrases
Matthias Huck, Hieu Hoang, Philipp Koehn · 2014
We present an effective technique to easily augment GHKM-style syntax-based ma-chine translation systems (Galley et al., 2006) with phrase pairs that do not comply with any syntactic well-formedness con-straints. Non-syntactic phrase pairs are distinguished from syntactic ones in or-der to avoid harming effects. We apply our technique in state-of-the-art string-to-tree and tree-to-string setups. For tree-to-string translation, we furthermore investi-gate novel approaches for translating with source-syntax GHKM rules in association with input tree constraints and input tree features. 1