ViziQuer: A Visual Notation and Tool for RDF Data Analysis Queries

Demonstration material (synthetic hospital data).

Try the tool online to graphically construct and execute rich data analysis queries over RDF data
Login as to a demo environment, or register as a new user. Consult ViziQuer/web main page for introduction to the tool and resources to set up new user projects.

Check out the code to set up the tool locally.

Data schema The hospital data schema used in the project.
See also visualization of the schema

Query environment set-up
  • Sign up (create a new user) to the ViziQuer server.
  • Create an empty project (New project), enter the project name (e.g. Hospital).
  • Open the project and upload the diagram file Hospital.json

    Use the 'Upload project' button:

  • Import the data ontology into the project (use the ‘Import ontology’ button from the project toolbar):

  • Check that in the project settings pane the setting SPARQL Endpoint has the value and the Named Graph is set to MiniBkusEN_1 (the settings should be there, if the project is imported, in any case they can be adjusted manually).

    The settings:

  • Core team
  • Prof. Karlis Cerans
  • Dr. Agris Sostaks
  • Dr. Arturs Sprogis
  • Dr. Lelde Lace
  • Dr. Uldis Bojars
  • Dr. Juris Barzdins
  • Julija Ovcinnikova
  • Mikus Grasmanis
  • We work at Institute of Mathematics and Computer Science, University of Latvia

  • K.Cerans, J.Barzdins, A.Sostaks, J.Ovcinnikova, L.Lace, M.Grasmanis and A.Sprogis. Extended UML Class Diagram Constructs for Visual SPARQL Queries in ViziQuer/web In Voila!2017, CEUR Workshop Proceedings, Vol.1947
  • K.Cerans, J.Ovcinnikova. ViziQuer: Notation and Tool for Data Analysis SPARQL Queries. In Voila!2016, CEUR Workshop Proceedings, Vol.1704
  • K.Cerans, J.Ovcinnikova, M. Zviedris. SPARQL Aggregate Queries made easy with Diagrammatic Query Language ViziQuer. In ISWC 2015 Posters & Demonstrations Track, CEUR Workshop Proceedings, Vol.1486
  • K.Cerans, J.Ovcinnikova, M. Zviedris. Towards Graphical Query Notation for Semantic Databases. In BIR 2015, Springer LNBIP.
  • G. Barzdins, S.Rikacovs, M. Zviedris. Graphical Query Language as SPARQL Frontend. In Local Proceedings of 13th East-European Conference (ADBIS 2009), pp. 93-107. Riga Technical University, Riga. (2009)
  • G.Barzdins, E.Liepins, M.Veilande, M.Zviedris, "Ontology Enabled Graphical Database Query Tool for End-Users", Selected papers from DBIS'2008, Hele-Mai Haav (Eds.), Frontiers in Artificial Intelligence and Applicatons series, IOS Press, 2009. 187:105-116