D-LTAG System: Discourse Parsing with a Lexicalized Tree-Adjoining Grammar

  title={D-LTAG System: Discourse Parsing with a Lexicalized Tree-Adjoining Grammar},
  author={Katherine Forbes-Riley and Eleni Miltsakaki and R. Prasad and Anoop Sarkar and Aravind K. Joshi and Bonnie Lynn Webber},
  journal={Journal of Logic, Language and Information},
We present an implementation of a discourse parsing system for alexicalized Tree-Adjoining Grammar for discourse, specifying the integrationof sentence and discourse level processing. Our system is based on theassumption that the compositional aspects of semantics at thediscourse level parallel those at the sentence level. This coupling isachieved by factoring away inferential semantics and anaphoric features ofdiscourse connectives. Computationally, this parallelism is achievedbecause both the… 

D-LTAG: extending lexicalized TAG to discourse

  • B. Webber
  • Linguistics, Sociology
    Cogn. Sci.
  • 2004

Sentential Structure and Discourse Parsing

In this paper, we describe how the LIDAS System (Linguistic Discourse Analysis System), a discourse parser built as an implementation of the Unified Linguistic Discourse Model (U-LDM) uses

Interfacing Sentential and Discourse TAG-based Grammars

This paper presents a method to smoothly interface sentential and discourse TAG grammars, based on Abstract Categorial Grammars (ACG) and relies on the modularity of the latter, which provides the possibility, as in D-STAG, to build discourse structures that are direct acyclic graphs (DAG) and not only trees.

Computing Discourse Semantics: The Predicate-Argument Semantics of Discourse Connectives in D-LTAG

The unique contribution of this paper lies in showing how compositional rules and anaphora resolution interact within the D-LTAG syntax-semantic interface to yield their semantic interpretations, with multi-component syntactic trees sometimes being required.

Linguistic Issues in Language Technology – LiLT

This article introduces Discourse Combinatory Categorial Grammar (DCCG) and shows how it can be used to generate multisentence paraphrases, flexibly incorporating both intraand intersentential

A PDTB-styled end-to-end discourse parser

This work has designed and developed an end-to-end discourse parser- to-parse free texts in the PDTB style in a fully data-driven approach and significantly improves on the current state-of-the-art connective classifier.

An approach in automatically generating discourse structure of text.

A system for automatically generating the discourse structure of text by integrating sentential syntactic structures and cue phrases into a beam search to reduce the search space of the discourse analyser and to generate the best discourse structure.

A PDTB-Styled End-to-End Discourse Parser

This work designed and developed an end-to-end discourse parser to parse free texts in the PDTB style in a fully data-driven approach and proposes and presents a comprehensive evaluation from both component-wise and error-cascading perspectives.

Sequence models and ranking methods for discourse parsing

The general applicability of the proposed discourse parsing model is demonstrated by applying it to the problem of syntactic dependency parsing, which points towards a layered sequential (re-)ranking architecture for complex language processing tasks applicable beyond discourse parsing.

A Study to Improve the Efficiency of a Discourse Parsing System

This paper presents a study of the implementation of a discourse parsing system, where only significant features are considered and the parsing algorithm and its rule set are developed in order to create a system with high accuracy and low complexity.



Tree Discourse Grammar or How to get attached to a discourse

A discourse grammar which is based on a further development of a Tree Adjoining Grammar (TAG) and the restriction that a newly processed sentence can only be added on the right frontier of the discourse tree is described.

Compositional Semantics With Lexicalized Tree-Adjoining Grammar (LTAG): How Much Underspecification is Necessary?

Let us consider a possible implication of the lexicalization of grammatical structures and the localization of dependencies (especially the predicate- argument relationships) that are central

Anchoring a Lexicalized Tree-Adjoining Grammar for Discourse

We here explore a ``fully'' lexicalized Tree-Adjoining Grammar for discourse that takes the basic elements of a (monologic) discourse to be not simply clauses, but larger structures that are anchored

Sentence Planning as Description Using Tree Adjoining Grammar

This approach captures naturally and elegantly the interaction between pragmatic and syntactic constraints on descriptions in a sentence, and the inferential interactions between multiple descriptions inA sentence.

A Lexicalized Tree Adjoining Grammar for English

This document describes a sizable grammar of English written in the TAG formalism and implemented for use with the XTAG system, which supersedes the TAG grammar described in [XTAG-Group, 1995].

Practical experiments in parsing using Tree Adjoining Grammars

An implementation of a chart-based head-corner parsing algorithm for lexicalized Tree Adjoining Grammars and some practical experiments that suggest that the observed complexity of parsing for LTAG is dominated by factors other than sentence length.

A Lexicalized Tree Adjoining Grammar for English

A representation of prepositional complements that is based on extended elementary trees, and how to deal with semantic non compositionality in verb-particle combinations, light verb constructions and idioms, without losing the internal syntactic composition of these structures are presented.

The Linguistic Structure of Discourse

In order to provide a principled foundation for the study of discourse, in this paper we propose answers to three basic questions: What are the atomic units of discourse? What kind of structures can

Tense as Discourse Anaphor

  • B. Webber
  • Sociology, Linguistics
    Comput. Linguistics
  • 1988
This paper considers a range of English expressions and shows how tensed clauses share these characteristics, usually just attributed to anaphoric noun phrases, and contributes to the knowledge of what is needed for understanding narrative text.

Factoring Predicate Argument and Scope Semantics: Underspecified Semantics with LTAG

It is shown that the derivation structure (and indirectly the locality of derivations) allows an appropriate amount of underspecification for quantifier scopeambiguities and related phenomena such as adjunct scope and islandconstraints.