Approaches for Updating Databases with Incompleted Information and Nulls,

Abstract

In this paper we consider approaches to updating databases containing null values and incomplete information. Our approach distinguishes between modeling incompletely known worlds and modeling changes in these worlds. As an alternative to the open and closed world assumptions, we propose the modified closed world assumption. Along with the discussion of updating, we address some issues of refining incompletely specified information. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1984
Accession Number
ADA144319

Entities

People

  • A. Keller
  • M. W. Wilkins

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  • Stanford University

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  • Ground and Sea Platforms

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  • Air Force
  • Algorithms
  • Computer Science
  • Computers
  • Database Management Systems
  • Databases
  • Engineering
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  • New York
  • Relational Database Management Systems
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  • Security
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  • Computer science

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  • Artificial Intelligence
  • Computational Modeling and Simulation