TAILIEUCHUNG - Báo cáo khoa học: "THEORETICAL/TECHNICAL ISSUES IN NATURAL LANGUAGE ACCESS TO DATABASES"

In responding to the guidelines established by the session chairman of this panel, three of the five topics he set forth will be discussed. These include aggregate functions and quantity questions, querying semantically complex fields, and multi-file queries. As we will make clear in the sequel, the transformational apparatus utilized in the TQA Question Answering System provides a principled basis for handling these and many other problems i n natural language access to databases. In addition to considering some subset of the chairman's five problems, each of the panelists was invited to propose and choose one issue of his/her. | THEORETICAL TECHNICAL ISSUES IN NATURAL LANGUAGE ACCESS TO DATABASES s. R. Petrick IBM . Watson Research Center INTRODUCTION In responding to the guidelines established by the session chairman of this panel three of the five topics he set forth will be discussed. These include aggregate functions and quantity questions querying semantically complex fields and multi-file queries. As we will make clear in the sequel the transformational apparatus utilized in the TQA Question Answering System provides a principled basis for handling these and many other problems in natural language access to databases. In addition to considering some subset of the chairman s five problems each of the panelists was invited to propose and choose one issue of his her own choosing. If time and space permitted I would have chosen the subject of extensibility of natural language systems to new applications. In light of existing restrictions however I have chosen a more tractable problem to which I have given some attention and in whose treatment I am interested this is the translation of quantified relational calculus expressions to a formal query language such as SQL. AGGREGATE FUNCTIONS AND QUANTITY QUESTIONS Questions such as How many employees are in the sales department must be mapped into three radically different database query language expressions depending on how the database is set up. It may be appropriate to retrieve a pre-stored total number of employees from a NUMBER-OF-EMPLOYEES field of a DEPARTMENT file or to count the number of records in an EMPLOYEE file that have the value SALES in the DEPARTMENT field or if departments are broken down into offices with which are associated the total numbers of employees employed therein to total the values of the NUMBER-OF-EMPLOYEES field in all the records for offices in the sales department. In the TQA System there are a number of different levels of representation of a given query. The grammar which assigns structure to a query .

• Báo cáo khoa học
• THEORETICAL TECHNICAL ISSUES
• NATURAL LANGUAGE ACCESS TO DATABASES
• S
• R
• Petrick
• scientific reports
• model language
• process natural language
• NATURAL LANGUAGE
• DATABASES THEORETICAL
• TECHNICAL ISSUES
• 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
• 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
• Jermld Kaplan Jim David
• TRANSPORTABLE NATURAL LANGUAGE
• INTERFACES TO DATABASES
• Gary G
• Hendrlx and William H
• Lewis
• TRANSPORTABLE NATURAL LANGUAGE INTERFACES
• PROBLEMS AND TECHNIQUES
• Barbara J
• Grosz
• 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