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arXiv · 1905.05682

A Unified Linear-Time Framework for Sentence-Level Discourse Parsing

Xiang Lin·Shafiq Joty·Prathyusha Jwalapuram·M Saiful Bari
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Abstract

We propose an efficient neural framework for sentence-level discourse analysis in accordance with Rhetorical Structure Theory (RST). Our framework comprises a discourse segmenter to identify the elementary discourse units (EDU) in a text, and a discourse parser that constructs a discourse tree in a top-down fashion. Both the segmenter and the parser are based on Pointer Networks and operate in linear time. Our segmenter yields an $F_1$ score of 95.4, and our parser achieves an $F_1$ score of 81.7 on the aggregated labeled (relation) metric, surpassing previous approaches by a good margin and approaching human agreement on both tasks (98.3 and 83.0 $F_1$).

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Xiang Lin, Shafiq Joty, Prathyusha Jwalapuram, M Saiful Bari. 2019-06-12. A Unified Linear-Time Framework for Sentence-Level Discourse Parsing. https://arxiv.org/abs/1905.05682

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