The indefinite closed world assumption

Q. Kong, Howard Williams, G. Chen

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The inadequacy of the Closed World Assumption in dealing with indefinite information has led to the Generalised Closed World Assumption and the Extended Generalised Closed World Assumption. However, these approaches have serious shortcomings. In this paper, the Indefinite Closed World Assumption is proposed to overcome the shortcomings. It provides a desirable and simple logical interpretation of a database containing indefinite information. © 1994.

Original languageEnglish
Pages (from-to)297-311
Number of pages15
JournalData and Knowledge Engineering
Issue number3
Publication statusPublished - May 1994


  • Deductive databases
  • Incomplete information
  • Indefinite databases


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