Formulating a query on a Linked Open Data (LOD) source is not an easy task; a technical knowledge of the query language, and, the awareness of the structure of the dataset are essential to create a query. We present a revised version of LODeX that provides the user an easy way for building queries in a fast and interactive manner. When a user decides to explore a LOD source, he/she can take advantage of the Schema Summary produced by LODeX (i.e. a synthetic view of the dataset’s structure) and he/she can pick graphical elements from it to create a visual query. The tool also supports the user in browsing the results and, eventually, in refining the query. The prototype has been evaluated on hundreds of public SPARQL endpoints (listed in Data Hub) and it is available online at http://dbgroup.unimo.it/lodex2. A survey conducted on 27 users has demonstrated that our tool can effectively support both unskilled and skilled users in exploring and querying LOD datasets.

LODeX: A tool for Visual Querying Linked Open Data / Benedetti, Fabio; Bergamaschi, Sonia; Po, Laura. - ELETTRONICO. - 1486:(2015). (Intervento presentato al convegno The 14th International Semantic Web Conference (ISWC-2015) tenutosi a Bethlehem,USA nel 11-15 October 2015).

LODeX: A tool for Visual Querying Linked Open Data

BENEDETTI, FABIO;BERGAMASCHI, Sonia;PO, Laura
2015

Abstract

Formulating a query on a Linked Open Data (LOD) source is not an easy task; a technical knowledge of the query language, and, the awareness of the structure of the dataset are essential to create a query. We present a revised version of LODeX that provides the user an easy way for building queries in a fast and interactive manner. When a user decides to explore a LOD source, he/she can take advantage of the Schema Summary produced by LODeX (i.e. a synthetic view of the dataset’s structure) and he/she can pick graphical elements from it to create a visual query. The tool also supports the user in browsing the results and, eventually, in refining the query. The prototype has been evaluated on hundreds of public SPARQL endpoints (listed in Data Hub) and it is available online at http://dbgroup.unimo.it/lodex2. A survey conducted on 27 users has demonstrated that our tool can effectively support both unskilled and skilled users in exploring and querying LOD datasets.
2015
The 14th International Semantic Web Conference (ISWC-2015)
Bethlehem,USA
11-15 October 2015
1486
Benedetti, Fabio; Bergamaschi, Sonia; Po, Laura
LODeX: A tool for Visual Querying Linked Open Data / Benedetti, Fabio; Bergamaschi, Sonia; Po, Laura. - ELETTRONICO. - 1486:(2015). (Intervento presentato al convegno The 14th International Semantic Web Conference (ISWC-2015) tenutosi a Bethlehem,USA nel 11-15 October 2015).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1075590
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