Technical report : OpenMaTrEx , a free , open - source hybrid data - driven machine translation system ∗

This report describes OpenMaTrEx, a free/open-source hybrid data-driven machine translation system containing core example-based components based on the marker hypothesis. OpenMaTrEx comprises a marker-driven chunker, a collection of chunk aligners, tools to merge (“hybridise”) marker-based and statistical translation tables, two engines —a simple proof-of-concept monotone “example-based” recombination engine and a statistical decoder based on Moses —, and support for automatic evaluation. It also contains support for “word packing” to improve alignment. OpenMaTrEx is a free/open-source release of basic components of MaTrEx, the Dublin City University machine translation system. The components and processes implemented in OpenMaTrEx are described in both theoretical and functional detail. Additionally, experimental results are shown in which OpenMaTrEx is compared to plain statistical machine translation on representative tasks.