Gómez-Rodríguez, Carlos, Carroll, John and Weir, David (2011) Dependency Parsing Schemata and Mildly Non-Projective Dependency Parsing. Computational Linguistics, 37 (3). 541-586.. ISSN 0891-2017

PDF Restricted to SRO admin only Download (663kB)

Abstract

We introduce dependency parsing schemata, a formal framework based on Sikkel's parsing schemata for constituency parsers, which can be used to describe, analyze, and compare dependency parsing algorithms. We use this framework to describe several well-known projective and non-projective dependency parsers, build correctness proofs, and establish formal relationships between them. We then use the framework to dene new polynomial-time parsing algorithms for various mildly non-projective dependency formalisms, including well-nested structures with their gap degree bounded by a constant k in time O(n 5+2k), and a new class that includes all gap degree k structures present in several natural language treebanks (which we call mildly ill-nested structures for gap degree k) in time O(n 4+3k). Finally, we illustrate how the parsing schema framework can be applied to Link Grammar, a dependency-related formalism.

Item Type:	Article
Schools and Departments:	School of Engineering and Informatics > Informatics
Depositing User:	John Carroll
Date Deposited:	06 Feb 2012 21:27
Last Modified:	08 Mar 2017 05:45
URI:	http://sro.sussex.ac.uk/id/eprint/31287

View download statistics for this item

📧 Request an update