Common Semantics for Sharing Knowledge: Contributions to - download pdf or read online

By Frithjof Dau, Marie L Mugnier, Gerd Stumme

ISBN-10: 3899581385

ISBN-13: 9783899581386

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Read Online or Download Common Semantics for Sharing Knowledge: Contributions to ICCS 2005: 13th International Conference on Conecptual Structures, ICCS 2005 Kassel, Germany, July 2005 PDF

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Additional info for Common Semantics for Sharing Knowledge: Contributions to ICCS 2005: 13th International Conference on Conecptual Structures, ICCS 2005 Kassel, Germany, July 2005

Example text

Equivalently, that if a given partition of attuples(Qi ), tributes is closed under r, it is also closed under r = Qi ∈cover(PCL ) and that if this partition is not closed under r it is not closed under r either. We will prove it in two steps: (⇒) We suppose that P is closed in r but not closed in r and derive a contradiction. If P ∈ cover(PCL ), tuples(P ) will be in r . If we suppose that P is not closed in r , then a more refined partition must be its closure. According to Proposition 8, any refinement of P will not match tuples(P ), which is a contradiction.

36 Int. Conf. on Conceptual Structures 2005 6 Conclusion We have presented the usage of CGs as a query language in VN-KIM, a knowledge and information extraction and retrieval system for Vietnamese language and entities. We have shown that, for querying knowledge graphs, simple CGs are more expressive and flexible than fixed textbox patterns, and more readable than SeRQL clauses. However, unlike other existing systems using CG, VN-KIM employs Sesame technology for managing knowledge in RDF and RDFS, which have been widely used.

Note that we make no claim about the truth-preserving characteristics of these steps: this clearly distinguishes them from the usual notion of a conceptual graph “transformation rule” which is intended to preserve the original graph’s meaning, as in work such as [1]. Here we have explicit change steps, which we expect will change the intent of the original graph – that is why we are doing it. Each difference operation represents a small change. The overall difference between two graphs is thereby captured by the accumulation of many small differences.

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Common Semantics for Sharing Knowledge: Contributions to ICCS 2005: 13th International Conference on Conecptual Structures, ICCS 2005 Kassel, Germany, July 2005 by Frithjof Dau, Marie L Mugnier, Gerd Stumme


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