Boolean Logic

Research output: Contribution to journalArticlepeer-review


The article describes and explains Boolean logic (or Boolean algebra) in its two principal forms: that of truth-values and the Boolean connectives and, or, and not, and that of set membership and the set operations of intersection, union and complement. The main application areas of Boolean logic to knowledge organization, namely post-coordinate indexing and search, are introduced and discussed. Some wider application areas are briefly mentioned, such as: propositional logic, the Shannon-style approach to electrical switching and logic gates, computer programming languages, probability theory, and database queries. An analysis is offered of shortcomings that Boolean logic has in terms of potential uses in knowledge organization.

Original languageEnglish (US)
Pages (from-to)177-191
Number of pages15
JournalKnowledge Organization
Issue number2
StatePublished - 2021


  • Boolean logic
  • false
  • set
  • true
  • truth

ASJC Scopus subject areas

  • Library and Information Sciences


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