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Academic Paper |
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| Title: | An alternative to synchronous tree substitution grammars |
| Author: | Andreas Maletti |
| Institution: | Rovira i Virgili University |
| Linguistic Field: | Computational Linguistics |
| Abstract: | Synchronous tree substitution grammars () are a (formal) tree transformation model that is used in the area of syntax-based machine translation. A competitor that is at least as expressive as is proposed and compared to . The competitor is the extended multi bottom-up tree transducer (), which is the bottom-up analogue with the additional feature that states have non-unary ranks. Unweighted have already been investigated with respect to their basic properties, but the particular properties of the constructions that are required in the machine translation task are largely unknown. and are compared with respect to binarization, regular restriction, and application. Particular attention is paid to the complexity of the constructions. |
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This article appears IN Natural Language Engineering Vol. 17, Issue 2. |
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