Binding across Boundaries

Kruijff, Geert-Jan M.

doi:10.1007/978-94-010-0037-6_5

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…Like other compositional grammatical frameworks, CCG allows logical forms to be built in parallel with the derivational process. Traditionally, the λ-calculus has been used to express semantic interpretations, but OpenCCG instead makes use of a more flexible representational framework, Hybrid Logic Dependency Semantics (Baldridge and Kruijff 2002;Kruijff 2003), or HLDS. In HLDS, hybrid logic (Blackburn 2000) terms are used to describe semantic dependency graphs, such as the one seen earlier in Figure 8.…”

Section: Figure 10mentioning

confidence: 99%

“…As discussed previously, in derivations the values of the info and owner features are propagated throughout an intonational phrase, which has the effect of propagating the values of the INFO and OWNER semantic features to every node in the dependency graph corresponding to the phrase. In this way, a distributed representation of the theme/rheme partition is encoded, in a fashion reminiscent of Kruijff's (2003) approach to representing topic-focus articulation using hybrid logic. By contrast, the KON feature (cf.…”

Section: Figure 10mentioning

confidence: 99%

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Generating Tailored, Comparative Descriptions with Contextually Appropriate Intonation

White

Clark²,

Moore

2010

Computational Linguistics

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Generating responses that take user preferences into account requires adaptation at all levels of the generation process. This article describes a multi-level approach to presenting user-tailored information in spoken dialogues which brings together for the first time multi-attribute decision models, strategic content planning, surface realization that incorporates prosody prediction, and unit selection synthesis that takes the resulting prosodic structure into account. The system selects the most important options to mention and the attributes that are most relevant to choosing between them, based on the user model. Multiple options are selected when each offers a compelling trade-off. To convey these trade-offs, the system employs a novel presentation strategy which straightforwardly lends itself to the determination of information structure, as well as the contents of referring expressions. During surface realization, the prosodic structure is derived from the information structure using Combinatory Categorial Grammar in a way that allows phrase boundaries to be determined in a flexible, data-driven fashion. This approach to choosing pitch accents and edge tones is shown to yield prosodic structures with significantly higher acceptability than baseline prosody prediction models in an expert evaluation. These prosodic structures are then shown to enable perceptibly more natural synthesis using a unit selection voice that aims to produce the target tunes, in comparison to two baseline synthetic voices. An expert evaluation and f0 analysis confirm the superiority of the generator-driven intonation and its contribution to listeners' ratings.

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Section: Figure 10mentioning

confidence: 99%

Section: Figure 10mentioning

confidence: 99%

Generating Tailored, Comparative Descriptions with Contextually Appropriate Intonation

White

Clark²,

Moore

2010

Computational Linguistics

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“…white.tex; 26/05/2004; 17:21; p.2 The algorithm has been implemented as an extension to the Open-CCG 2 open source CCG parser, and takes advantage of the multi-modal extensions to CCG developed by Baldridge (2002) and Baldridge and Kruijff (2003), as well as their dependency-based approach to representing linguistic meaning, Hybrid Logic Dependency Semantics (HLDS; Kruijff, 2001;Baldridge and Kruijff, 2002;Kruijff, 2003). Initial performance tests indicate that the realizer is fast enough for practical use in natural language dialogue systems.…”

Section: Introductionmentioning

confidence: 99%

Efficient Realization of Coordinate Structures in Combinatory Categorial Grammar

White

2006

Res Lang Comput

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Abstract. We describe a chart realization algorithm for Combinatory Categorial Grammar (CCG), and show how it can be used to efficiently realize a wide range of coordination phenomena, including argument cluster coordination and gapping. The algorithm incorporates three novel methods for improving the efficiency of chart realization: (i) using rules to chunk the input logical form into sub-problems to be solved independently prior to further combination; (ii) pruning edges from the chart based on the n-gram score of the edge's string, in comparison to other edges with equivalent categories; and (iii) formulating the search as a best-first anytime algorithm, using n-gram scores to sort the edges on the agenda. The algorithm has been implemented as an extension to the OpenCCG open source CCG parser, and initial performance tests indicate that the realizer is fast enough for practical use in natural language dialogue systems.

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Generalizing dimensionality in combinatory categorial grammar

Kruijff

Baldridge

2004

Proceedings of the 20th International Conference on Computational Linguistics - COLING '04

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We extend Combinatory Categorial Grammar (CCG) with a generalized notion of multidimensional sign, inspired by the types of representations found in constraint-based frameworks like HPSG or LFG. The generalized sign allows multiple levels to share information, but only in a resource-bounded way through a very restricted indexation mechanism. This improves representational perspicuity without increasing parsing complexity, in contrast to full-blown unification used in HPSG and LFG. Well-formedness of a linguistic expressions remains entirely determined by the CCG derivation. We show how the multidimensionality and perspicuity of the generalized signs lead to a simplification of previous CCG accounts of how word order and prosody can realize information structure.

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Binding across Boundaries

Cited by 3 publications

References 14 publications

Generating Tailored, Comparative Descriptions with Contextually Appropriate Intonation

Generating Tailored, Comparative Descriptions with Contextually Appropriate Intonation

Efficient Realization of Coordinate Structures in Combinatory Categorial Grammar

Generalizing dimensionality in combinatory categorial grammar

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