Caitra is a translation Computer Assisted Tool, or CAT, developed by the University of Edinburgh.
Provided from an online platform, Caitra is based on AJAX Web.2 technologies and the Moses decoder.
The Trans-Type project (Langlais et al., 2000) gave a pioneer approach to the MT as an aid to human translators.
The School of Informatics and the Machine Translation Group of the University of Edinburgh, created a research program, CAITRA, to analyze the benefits of different types of MTs and to explore the interaction between the machine and the user in order to develop new CAT tools.
Caitra is programmed with an open-source web framework, Ruby on Rails (Thomasand Hansson, 2008).
The online platform uses Ajax-style Web 2.0 technologies (Raymond, 2007) connected to a MySQL database-driven back-end.
The machine translation back-end is powered by the statistical sentence-based MT, Moses (Koehn et al., 2007).
The prediction is the optimal completion path that matches the user input with (a) minimal string edit distance and (b) highest sentence translation probability.
Preliminary studies about CAITRA suggest that users usually accept 50-80% of predictions generated by the system.