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The PLUG project: parallel corpora in Linköping, Uppsala, Göteborg: aims and achievements

In this paper we present the aims and achievements of the PLUG project. It is a cooperative Swedish project focusing on the generation of translation data from sentence-aligned bitext with Swedish as the source or the target. A sentence-aligned quadrilingual corpus was established and used as a testbed. Two systems for word linking and contrastive lexical extraction were evaluated and improved with the aim of combining them into a common system. The common system will run as an application of a modular corpus tool also created in the project. The basic principles of the word linking systems are outlined and illustrative results are presented and discussed with regard to recall, precision, and application in example-based machine translation, enhanced machine translation, transfer-based machine translation and human translation. Further processing for these applications as well as integration issues remain to be explored. Finally, the extraction of syntactic translation data is an issue that remains to be approached. Focus will be set on verb valency with imperative and infinitive clauses as basic frames.