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Transforming Dependency Structures to LTAG Derivation Trees

机译:将依赖性结构转换为LTAG推导树

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We propose a new algorithm for parsing Lexicalized Tree Adjoining Grammars (LTAGs) which uses pre-assigned bilexi-cal dependency relations as a filter. That is, given a sentence and its corresponding well-formed dependency structure, the parser assigns elementary trees to words of the sentence and return attachment sites compatible with these elementary trees and predefined dependencies. Moreover, we prove that this algorithm has a linear-time complexity in the input length. This algorithm returns all compatible derivation trees as a packed forest. This result is of practical interest to the development of efficient weighted LTAG parsers based on derivation tree decoding.
机译:我们提出了一种新的算法,用于解析使用预先分配的Bilexi-Cal依赖关系作为过滤器的邻接树邻接语法(LTAG)。也就是说,给定句子及其相应的良好依赖性结构,解析器将基本树分配给句子的单词和与这些基本树和预定义的依赖项兼容的返回附件站点。此外,我们证明了该算法在输入长度中具有线性时间复杂度。此算法将所有兼容的派生树返回为包装林。基于推导树解码,这一结果对高效加权LTAG解析器的开发是实际兴趣。

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