Results 1 - 10 of 128

CG-SQL: A Front-end Language for Conceptual Graph Knowledge Bases

by Stéphane Coulondre
"... Conceptual Graph (CG) knowledge bases can be queried only by mean of goals. We show that some conventional operators (projection, selection, union, cartesian product) can not be expressed unless a set of rules is added to the knowledge base prior to the inference, which is highly inconvenient. There ..."
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. Therefore, we propose an algebra and a declarative SQL-like language for the CG model, which permits the expression of complex queries with the above four operators, leaving the knowledge base unchanged. We prove that CG-SQL is complete with respect to safe sets of rules and that queries are decidable

Conceptual graphs

by John F. Sowa - Information Processing in Mind and Machine , 1984
"... Abstract. A conceptual graph (CG) is a graph representation for logic based on the semantic networks of artificial intelligence and the existential graphs of Charles Sanders Peirce. Several versions of CGs have been designed and implemented over the past thirty years. The simplest are the typeless c ..."
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Abstract. A conceptual graph (CG) is a graph representation for logic based on the semantic networks of artificial intelligence and the existential graphs of Charles Sanders Peirce. Several versions of CGs have been designed and implemented over the past thirty years. The simplest are the typeless

Conceptual graphs for representing conceptual structures

by John F. Sowa, Vivomind Intelligence - Conceptual Structures in Practice , 2009
"... Abstract. A conceptual graph (CG) is a graph representation for logic based on the semantic networks of artificial intelligence and the existential graphs of Charles Sanders Peirce. CG design principles emphasize the requirements for a cognitive representation: a smooth mapping to and from natural ..."
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Abstract. A conceptual graph (CG) is a graph representation for logic based on the semantic networks of artificial intelligence and the existential graphs of Charles Sanders Peirce. CG design principles emphasize the requirements for a cognitive representation: a smooth mapping to and from natural

From Existential Graphs to Conceptual Graphs

by John F. Sowa
"... Abstract. Existential graphs (EGs) are a simple, readable, and expressive graphic notation for logic. Conceptual graphs (CGs) combine a logical foundation based on EGs with features of the semantic networks used in artificial intelligence and computational linguistics. CG design principles address l ..."
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Abstract. Existential graphs (EGs) are a simple, readable, and expressive graphic notation for logic. Conceptual graphs (CGs) combine a logical foundation based on EGs with features of the semantic networks used in artificial intelligence and computational linguistics. CG design principles address

GET: An Implementation of Conceptual Graphs

by Michel Wermelinger , 1991
"... This paper describes GET (Graph Editor and Tools), a partial implementation of Sowa's conceptual structures. First, a brief overview of X-Prolog, an X-Windows based Prolog programming environment, is given. A summary of GET's graphical interface and linear notation follows. Finally, an ..."
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, an example application using the graphs to represent sentences in Portuguese will be presented. Keywords: conceptual structures, knowledge representation, graphical interfaces, natural language processing. 1 Introduction Conceptual structures are an ambitious attempt to represent knowledge in a natural

GET: An Implementation of Conceptual Graphs

by Michel Wermelinger Mw, Michel Wermelinger , 1991
"... This paper describes GET (Graph Editor and Tools), a partial implementation of Sowa's conceptual structures. First, a brief overview of X-Prolog, an X-Windows based Prolog programming environment, is given. A summary of GET's graphical interface and linear notation follows. Finally, an ..."
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, an example application using the graphs to represent sentences in Portuguese will be presented. Keywords: conceptual structures, knowledge representation, graphical interfaces, natural language processing. 1 Introduction Conceptual structures are an ambitious attempt to represent knowledge in a natural

Modelling Navigational Knowledge by Route Graphs

by Steffen Werner, Bernd Krieg-Brückner, Theo Herrmann - IN: CH. FREKSA ET AL. (EDS): SPATIAL COGNITION II 1849 , 2000
"... Navigation has always been an interdisciplinary topic of research, because mobile agents of different types are inevitably faced with similar navigational problems. Therefore, human navigation can readily be compared to navigation in other biological organisms or in artificial mobile agents like ..."
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, abstract formalism to express the key concepts of route-based navigation in a common scientific language. Starting with the distinction of places and route segments, we develop the notion of a route graph, which can serve as the basis for complex navigational knowledge. Implications and constraints

Formal Conceptual Structure in Language

by Janos J. Sarbo - Proceedings of Computing Anticipatory Systems (CASYS'98 , 1999
"... . Conceptual structures like conceptual graphs and concept lattices are formal representations of knowledge, e.g. structure or information content. In this paper, it is argued that, based on Peirce's semeiotic theory of signs and linguistic knowledge about syntactic clusters, conceptual struc ..."
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. Conceptual structures like conceptual graphs and concept lattices are formal representations of knowledge, e.g. structure or information content. In this paper, it is argued that, based on Peirce's semeiotic theory of signs and linguistic knowledge about syntactic clusters, conceptual

DB-MAT: Knowledge Acquisition, Processing and NL Generation Using Conceptual Graphs

by Galia Angelova, Kalina Bontcheva - Proceedings of the 4th International Conference on Conceptual Structures: Knowledge Representation as Interlingua , 1996
"... . This paper presents some research results and a demo implementation of a knowledge-based Machine Aided Translation (MAT) system supporting the translation process with the necessary linguistic and conceptual knowledge. Conceptual Graphs (cgs) were chosen as a knowledge representation formalism ..."
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. This paper presents some research results and a demo implementation of a knowledge-based Machine Aided Translation (MAT) system supporting the translation process with the necessary linguistic and conceptual knowledge. Conceptual Graphs (cgs) were chosen as a knowledge representation

Evaluating Conceptual Modeling Languages

by Tim Menzies, Robert F. Cohen, Sam Waugh , 1997
"... An important assumption for many KA researchers is structure preservation ; i.e. conceptual models can be converted in a straight forward manner into a design for an implementation. This assumption may not always hold. Seemingly trivial variants in a qualitative conceptual models can block prag ..."
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pragmatically desirable properties such as KB-testability and KBmaintainability. KB-testability and KB-maintainability are an important property: we must not build knowledge bases that are untestable or unmaintainable. Hence, we argue against using these features within conceptual models. The tools used
Results 1 - 10 of 128