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John Zachman introduced a framework for information systems architecture (SA) that has been widely adopted by systems analysts and database designers. It provides a taxonomy for relating the concepts that describe the real world to the concepts that describe an information system and its implementation. The ISA framework has a simple elegance that makes it(More)
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 core CGs, which correspond to Peirce’s original existential graphs.(More)
A semantic network or net is a graph structure for representing knowledge in patterns of interconnected nodes and arcs. Computer implementations of semantic networks were first developed for artificial intelligence and machine translation, but earlier versions have long been used in philosophy, psychology, and linguistics. The Giant Global Graph of the(More)
The Internet is a giant semiotic system. It is a massive collection of Peirce's three kinds of signs: icons, which show the form of something; indices, which point to something; and symbols, which represent something according to some convention. But current proposals for ontologies and metadata have overlooked some of the most important features of signs.(More)
A data base system that supports natural language queries is not really natural if it requires the user to know how the data are represented. This paper defines a formalism, called conceptual graphs, that can describe data according to the user’s view and access data according to the system’s view. In addition, the graphs can represent functional(More)
Although logic is general enough to describe anything that can be implemented on a digital computer, the unreadability of predicate calculus makes it unpopular as a design language. Instead, many graphic notations have been developed, each for a narrow range of purposes. Conceptual graphs are a graphic system of logic that is as general as predicate(More)
Michael Alexander Kirkwood Halliday has been actively analyzing and documenting the interactions between syntax and semantics for over forty years, and his systemic– functional theory has been a foundation for important work in computational linguistics for at least thirty years. The first major application of systemic theory was the SHRDLU system by(More)