TAILIEUCHUNG - Báo cáo khoa học: "Simplifying Deterministic Parsing"

This paper presents a model for deterministic parsing which was designed to simplify the task of writing and understanding a deterministic grammar. While retaining structures and operations similar to those of Mareus's PARSIFAL parser [Marcus 80] the grammar language incorporates the following changes. (1) The use of productions operating in parallel has essentially been eliminated and instead the productions are organized into sequences. Not only does this improve the understandability of the grammar, it is felt that, this organization corresponds more closely to the task of performing the sequence of buffer transformations and attachments required to parse the most. | Simplifying Deterministic Parsing Alan w. Carter1 Michael J. Frelllng2 Department of Computer Science University of British Columbia Vancouver . V6T 1W5 Department of Computer Science Oregon State University Corvallis OR S7331 ABSTRACT This paper presents a model for deterministic parsing which was designed to simplify the task of writing and understanding a deterministic grammar. While retaining structures and operations similar to those of Marcus s PARSIFAL parser Marcus 80 the grammar language incorporates the following changes. 1 The use of productions operating in parallel has essentially been eliminated and instead the productions are organized into sequences. Not only does this improve the understandability of the grammar it is felt that this organization corresponds more closely to the task of performing the sequence of buffer transformations and attachments required to parse the most common constituent types. 2 A general method for interfacing between the parser and a semantic representation system is introduced. This interface is independent of the particular semantic representation used and bides all details of the semantic processing from the grammar writer. 3 The interface also provides a general method for dealing with syntactic ambiguities which arise from the attachment of optional modifiers such as prepositional phrases. This frees the grammar writer from determining each point at which such ambiguities can occur. 1. INTRODUCTION Marcus has effectively described the advantages of a deterministic parsing model as is embodied in his PARSIFAL system. Unfortunately a hindrance to the usability of PARSIFAL is the complexity of its grammar. The popularity of Woods ATN parsing model Woods 70 demonstrates that the ease with which a grammar can be written and understood is one of the greatest factors contributing to its usability. This paper describes DPARSER Deterministic PARSER which is an implementation of an alternate deterministic parsing model .

• Báo cáo khoa học
• Simplifying Deterministic Parsing
• Alan W
• Carter
• scientific reports
• model language
• process natural language
• 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
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• Individuals in Natural
• Language Understanding
• The Use of Ooject Special Knowledge
• Natural Language Processing
• Mark H
• Bursteln