ViziQuer: A Web-Based Tool for Visual Diagrammatic Queries Over RDF Data

  title={ViziQuer: A Web-Based Tool for Visual Diagrammatic Queries Over RDF Data},
  author={Kārlis {\vC}erāns and Agris Sostaks and Uldis Bojars and Julija Ovcinnikova and Lelde Lace and Mikus Grasmanis and Aiga Romane and Arturs Sprogis and Juris Barzdins},
We demonstrate the open source ViziQuer tool for web-based creation and execution of visual diagrammatic queries over RDF/SPARQL data. The tool supports the data instance level and statistics queries, providing visual counterparts for most of SPARQL 1.1 select query constructs, including aggregation and subqueries. A query environment can be created over a user-supplied SPARQL endpoint with known data schema (a data schema exploration service is available, as well). There are pre-defined… 
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SPARQL 1 . 1 Query Language
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