Conceptual Structures: Current Practices: Second by William M. Tepfenhart, Judith P. Dick, John F. Sowa

By William M. Tepfenhart, Judith P. Dick, John F. Sowa

This ebook is the complaints of the second one foreign convention on Conceptual buildings, ICCS '94, held in school Park, Maryland, united states in August 1994.
This complaints provides, on a global scale, up-to- the-minute learn effects on theoretical and applicational features of conceptual graphs, really at the use of contexts in wisdom illustration. the concept that of contexts is extremely very important for every kind of knowledge-intensive structures. The e-book is equipped into sections on typical language figuring out, rational challenge fixing, conceptual graph conception, contexts and canons, and information modeling.

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Extra info for Conceptual Structures: Current Practices: Second International Conference on Conceptual Structures, ICCS'94 College Park, Maryland, USA August 16–20, 1994 Proceedings

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Extreme multiplicity has been recognized as a problem for artificial intelligence also. -The solution here has been to restrict the domain, thus hopefully limiting the number of uses of a word. This should make it possible to list all the senses of a single word. A nice example of a small limited domain is the blocks world of [Winograd, 1972]. Nowadays the domains are larger, including practical areas like medicine, technical science, metallurgy. But still compositionality is accepted by most approaches, together with the semantic determinacy principle.

This important operation that allows us to incorporate common-sense knowledge in our natural language model was called schematic join in [Sowa, 1984], as it consists of a join between a graph and a schema for a type in that graph. D e f i n i t i o n 4 A conceptual graph G ~ is an expansion of a conceptual graph G if there is a derivation G => ... ~ G ~ that applies some number of schematic joins. The idea is that the conceptual graph corresponding to a sentence is achieved by joining expanded word graphs.

Given two time intervals X and Y, the relation BEFORE(X, Y, Lap) holds if we have the following constraints between the begin- and end- times of X and Y compared on a time scale with the operators {>, <, =} : BT(X) < ET(X); BTCO < ET(Y); BT(X) < BT(Y); ET(X) < ET(Y); BT(Y) - ET(X) = Lap. The Lap parameter is a real number that measures the distance between the beginning of interval Y and the end of interval X on the time scale. Given two time intervals X and Y, the relation DURING (X, Y, DB, DE) holds if we have the following constraints between the begin- and end- times of X and Y compared on a time scale with the operators {>, <, =} : BT(X) < ET(X); BT(Y) < ET(Y); BT(X) > BTfY); ET(X) < ET(Y); BT(X) - BT(Y) = DB; ETCY) - ET(X) = DE.

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