TAILIEUCHUNG - Báo cáo khoa học: "Lexicon acquisition with a large-coverage unification-based grammar"

We describe how unknown lexical entries are processed in a unification-based framework with large-coverage grammars and how from their usage lexical entries are extracted. To keep the time and space usage during parsing within bounds, information from external sources like Part of Speech (PoS) taggers and morphological analysers is taken into account when information is constructed for unknown words. | Lexicon acquisition with a large-coverage unification-based grammar Frederik Fouvry Computational Linguistics Saarland University PO Box 15 11 50 D-66041 Saarbnicken Germany fouvry@ Abstract We describe how unknown lexical entries are processed in a unification-based framework with large-coverage grammars and how from their usage lexical entries are extracted. To keep the time and space usage during parsing within bounds information from external sources like Part of Speech PoS taggers and morphological analysers is taken into account when information is constructed for unknown words. 1 Introduction For Natural Language Processing NLP in general and processing with linguistically rich frameworks more specifically unknown words are a problem. The following gives an idea of the extent of the problem. In an evaluation of a large-scale grammar for unrestricted text on a newspaper corpus we found that the number of failed parses due to unknown words accounted for around 89 of the total number of unsuccessful analyses. Even though this figure does not say anything about the grammar these failures may be hiding many others it shows the importance of the problem. For unification-based implementations which often refer to linguistic theories and are therefore rich in information one approach to deal with unknown words has been proposed several times to exploit the syntactic context of completed analyses to collect information about a new word. A few implementations have been developed to demonstrate the feasibility of the technique but to our knowledge it has not been applied yet to large-coverage grammars. In this note we discuss how we are applying it to such a grammar for unrestricted text. Starting from this standard technique we extend it and integrate PoS and morphological information originating from external resources. We will first describe the method of learning information from the syntactic context. Then we discuss the current results of our .

• Báo cáo khoa học
• Lexicon acquisition
• a large coverage unification based grammar
• Frederik Fouvry
• scientific reports
• model language
• process natural language
• Fast Online Lexicon Learning
• Grounded Language Acquisition
• David L
• Chen
• báo cáo khoa học
• báo cáo ngôn ngữ
• ngôn ngữ tự nhiên
• From Submit to Submitted via Submission
• On Lexical Rules
• Large Scale Lexicon Acquisition
• mô hình ngôn ngữ
• xử lý ngôn ngữ tự nhiên
• Acquisition of a Lexicon
• Semantic Representations of Sentences
• Cynthia A
• Thompson
• Effect of Cross Language IR
• Bilingual Lexicon Acquisition
• Comparable Corpora
• 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
• Long Papers
• 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