TAILIEUCHUNG - Báo cáo khoa học: "A COMPOSITIONAL SEMANTICS OF TEMPORAL EXPRESSIONS IN ENGLISH"

This paper describes a compositional semantics for temporal expressions as part of the meaning representation language (MRL) of the JANUS system, a natural language understanding and generation system under joint development by BBN Laboratoires and the Information Sciences Institute. 1 The analysis is based on a higher order intansional logic described in detail in Hinrichs, Ayuso and Scha (1987). Temporal expressions of English are translated into this language as quantifiers over times which bind temporal indices on predicates. The semantic evaluation of time-dependent predicates is defined relative to a set of discourse contexts, which, following Reichenbach (1947), include the. | A COMPOSITIONAL SEMANTICS OF TEMPORAL EXPRESSIONS IN ENGLISH Erhard w. Hinrichs BBN Laboratories Inc. 10 Moulton St. Cambridge MA 02238 Abstract This paper describes a compositional semantics for temporal expressions as part of the meaning representation language MRL of the JANUS system a natural language understanding and generation system under joint development by BBN Laboratoires and the Information Sciences The analysis is based on a higher order intensional logic described in detail in Hinrichs Ayuso and Scha 1987 . Temporal expressions of English are translated into this language as quantifiers over times which bind temporal indices on predicates. The semantic evaluation of time-dependent predicates is defined relative to a set of discourse contexts which following Reichenbach 1947 include the parameters of speech time and reference time. The resulting context-dependent and multi-indexed interpretation of temporal expressions solves a set of well-known problems that arise when traditional systems of tense logic are applied to natural language semantics. Based on the principle of rule-to-rule translation the compositional nature of the analysis provides a straightforward and well-defined interface between the parsing component and the semantic interpretation component of JANUS. 1 Introduction JANUS is a natural language understanding and generation system which allows the user to interface with several knowledge bases maintained by the US NAVY. The knowledge bases contain among other things information about the deployment schedules locations and readiness conditions of the ships in the Pacific Fleet. 1 a. Did the admiral deploy the ship b. Which C3 ships are now C4 c. When will Vincent arrive in Hawaii d. Who was Frederick s previous commander As the sample queries in 1 demonstrate much of The work presented here was supported under OARPA contract N00014-85-C-0016. The views and conclusions contained in this document are those of the authors and

• Báo cáo khoa học
• A COMPOSITIONAL SEMANTICS
• TEMPORAL EXPRESSIONS IN ENGLISH
• Erhard W
• Hinrichs
• scientific reports
• model language
• process natural language
• Learning Dependency Based Compositional Semantics
• Percy Liang
• Long Papers
• báo cáo khoa học
• báo cáo ngôn ngữ
• ngôn ngữ tự nhiên
• Compositional Semantics
• Linguistic Formalisms
• Shuly Wintner
• mô hình ngôn ngữ
• xử lý ngôn ngữ tự nhiên
• Focusing Subjuncts
• Daniel Lyons
• German Prefix Verbs
• Maria Wolters
• Dialog Control
• Natural Language System
• Dialog Control in a Natural Language System
• Expanding the Horizons
• Natural Language Interfaces
• Phil Hayes
• PROSPECTS OR PRACTICAL
• NATURAL LANGUAGE SYSTEMS
• Workshops
• NATURAL LANGUAGE
• INTERACTION WITH MACHINES
• COMPUTER INTEBFACE DESIGN MURRAY TUROFF DEPARTMENT OF COMPUTER
• IiVFORMATION SCIENCE IIEW JERSEY INSTITUTE OF TECHNOLOGY
• EVALUATION OF NATURAL LANGUAGE
• INTERFACES TO DATABASE SYSTEMS
• A PANEL DISCUSSION
• database query system
• J
• Norwood Crout
• INTERFACES TO DATA BASE SYSTEMS
• Bozena Henisz
• INTERPRETING NATURAL LANGUAGE
• DATABASE UPDATES
• S
• Jermld Kaplan Jim David
• TRANSPORTABLE NATURAL LANGUAGE
• INTERFACES TO DATABASES
• Gary G
• Hendrlx and William H
• Lewis
• DATABASES THEORETICAL
• TECHNICAL ISSUES
• TRANSPORTABLE NATURAL LANGUAGE INTERFACES
• PROBLEMS AND TECHNIQUES
• Barbara J
• Grosz
• THEORETICAL TECHNICAL ISSUES
• NATURAL LANGUAGE ACCESS TO DATABASES
• R
• Petrick
• Domain Independent
• Database Access Systems
• ISSUES IN NATURAL LANGUAGE
• ACCESS TO DATABASES
• A LOGIC PROGRAMMING PERSPECTIVE
• Sharon C
• Salveter David Maier
• PLANNING NATURAL LANGUAGE
• EXPRESSIONS REFERRING
• Douglas E
• Appelt
• THE TEXT SYSTEM
• NATURAL LANGUAGE GENERATION
• Kathleen R
• M
• MENTING A DATABASE
• KNOWLEDGE REPRESENTATION
• THE KEY TO THE SELECTION PROBLEM
• E
• Jeffrey Conklin David D
• McDonald
• A KNOWLEDGE ENGINEERING
• NATURAL LANGUAGE UNDERSTANDING
• Stuart C
• Shapiro
• NATURAL LANGUAGE TEXTS
• NECESSARILY GRAMMATICAL
• EVEN COMPLETE
• UNGRAMHATICALITY
• EXTRA GRAMMATICALITY
• NATURAL LANGUAGE UNDERSTANDING SYSTEMS
• Taxonomy
• Descriptions
• Individuals in Natural
• Language Understanding
• The Use of Ooject Special Knowledge
• Natural Language Processing
• Mark H
• Bursteln