Knowledge representation concepts, paradigms and techniques for use in knowledge-based situation analysis support systems


  1. Roy, J.
  2. Auger, A.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN)
Over the years, situation awareness has emerged as an important concept supporting dynamic human decision-making in both military and public security environments; situation analysis is defined as the process that provides and maintains a state of situation awareness for decision makers. Information fusion is a key enabler to meeting the demanding requirements of situation analysis in future command and control and intelligence support systems. Adopting a knowledgecentric view of situation analysis and information fusion ultimately requires that one cares about knowledge representation (KR), a discipline concerned with how knowledge can be represented symbolically to be eventually manipulated in an automated way by reasoning programs. This memorandum discusses many aspects of KR, including symbol systems, syntax, meaning and semantics, formal versus non-formal representations, and modeling and representation dimensions. A number of KR paradigms, schemes and techniques are presented, with emphasis given to production rules, frames, first-order logic, and description logics. Some definitions of the word ontology are provided, as this field of KR has received increasing attention during the last decade. The memorandum reviews the categorization of ontologies, the combination of different ontologies into a library, ontology design principles, the languages for building ontologies, and other relevant aspects. The memorandum provides a comprehensive description of KR, thereby contr

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Knowledge-Based System;Knowledge Representation;Ontology;Logic;Production Rules;Semantic Network;Frame;Information Fusion
Report Number
DRDC-VALCARTIER-TM-2006-755 — Technical Memorandum
Date of publication
01 Oct 2008
Number of Pages

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