Common Semantics for Sharing Knowledge: Contributions to by Frithjof Dau, Marie L Mugnier, Gerd Stumme

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By Frithjof Dau, Marie L Mugnier, Gerd Stumme

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

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The FROM clause contains path expressions. The WHERE clause expresses constraints on the values of variables. Finally, the USING NAMESPACE clause declares namespaces that are used for the mapping of abbreviated URIs. vn/vnkim/vnkimo-rdf-schema#> 30 Int. Conf. on Conceptual Structures 2005 City Country “Vietnam” Fig. 2 Graph representation of a SeRQL query SeRQL also provides some shortcuts to simplify query formulation.

The XML file contains both the logical and graphical information of each element in the query graph. g. the type and referent of a concept element). The graphical properties such as positions and colours are used for displaying the graph. The details of such an XML file and its DTD are presented in the Appendix. Fig. 3. An example query CG 35 Int. Conf. on Conceptual Structures 2005 Fig. 4. Partial concept and relation ontologies Fig. 5. Query results For example, suppose that one wants to find all public companies that are located in a country of North America and have their stock exchange names begin with “AB”.

In Corese ([6]), both knowledge and queries are represented in RDF extended with some CG features, which are then converted into CGs for matching using CG operations. 27 Int. Conf. on Conceptual Structures 2005 Meanwhile, new technologies for management of knowledge and information, in particular on the Web, have emerged. For examples, Sesame ([10]) is for storing and querying RDF and RDF Schema (RDFS), Lucene ([9]) is for indexing and searching XML, and GATE ([7]) is for information extraction.

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