tailieunhanh - Báo cáo khoa học: "INTERPRETING SYNTACTICALLY ILL-FORMED SENTENCES"

The paper discusses three different kinds of syntactic ill-formedness: ellipsis, conjunctions, and actual syntactic errors. It is shown how a new grammatical formalism, based on a two-level repr_e sentation of the syntactic knowledge is used to cope with Ill-formed sentences. The basic control struc ture of the parser is briefly sketched; the paper shows that it can be applied without any substan tial change both to correct and to ill-formed sen tences. This is achieved by introducing a mechanism for the hypothesization of syntactic structures, which is largely independent of the rules defining the well-formedness. . | INTERPRETING SYNTACTICALLY ILL-FORMED SENTENCES Leonardo LESMO and Pietro TORASSO Dipartimento di Informatica - Corso Massimo D Azeglio 42 - Universita1 di Torino 10125 Torino - ITALY ABSTRACT The paper discusses three different kinds of syntactic ill-formedness ellipsis conjunctions and actual syntactic errors. It is shown how a new grammatical formalism based on a two-level repre sentation of the syntactic knowledge is used to cope with ill-formed sentences. The basic control struc ture of the parser is briefly sketched the paper shows that it can be applied without any substan tial change both to correct and to ill-formed sen tences. This is achieved by introducing a mechanism for the hypothesization of syntactic structures which is largely independent of the rules defining the well-formedness. On the contrary the second level of syntactic knowledge embodies those rules and is used to validate the hypotheses emitted by the first level. Alternative hypotheses are obtain ed when needed by means of local reorganizations of the parse tree. Sentence fragments are handled by the same mechanism but in this case the second level rules are used to detect the absence of one or more constituents. INTRODUCTION In the last years we have been involved in building a natural language Italian interface to ward a relational database. Even if this research required to consider issues relative to knowledge representation Lesmo et al 83 and query optimize tion Lesmo et al in press our main concern was to devise efficient parsing techniques Lesmo et al 81 Lesmo it Torasso 83 . The term efficient when applied to language processing can take a number of different meanings ranging from pure processing speed to the ability to analyze fragments of text to the flexibility that characterizes the behavior of the parser. We believe that all facets of efficiency are worth be ing pursued but if the communication between the man and the machine has to occur in a really natu ral fashion the .

• Báo cáo khoa học
• INTERPRETING SYNTACTICALLY
• ILL FORMED SENTENCES
• Leonardo
• scientific reports
• model language
• process natural language
• Lecture Theory of translation and interpreting
• Bài giảng Lý thuyết biên phiên dịch
• Theory of translation and interpreting
• Cultural equivalent
• Syntactically weak sentences
• Translation of dialect
• 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