Conceptual Graph Programs and Their Declarative Semantics

Bikash Chandra GHOSH  Vilas WUWONGSE  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E78-D   No.9   pp.1208-1217
Publication Date: 1995/09/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Artificial Intelligence and Cognitive Science
Keyword: 
artificial intelligence,  knowledge representation,  conceptual structures,  conceptual graphs,  logic programming,  order-sorted logic,  non-classical logic,  declarative semantics,  

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Summary: 
Conceptual graph formalism is a knowledge representation language in AI based on a graphical form of logic. Although logic is the basis of the conceptual graph theory, there is a strongly felt absence of a formal treatment of conceptual graphs as a logic programming language. In this paper, we develop the notion of a conceptual graph program as a kind of graph-based order-sorted logic program. First, we define the syntax of the conceptual graph program by specifying its major syntactic elements. Then, we develop a kind of model theoretic semantics and fixpoint semantics of the conceptual graph program. Finally, we show that the two types of semantics coincide for the conceptual graph programs.