OWLGrEd Ontology Visualizer
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The OWLGred Ontology Visualizer, developed by the Institute of Mathematics and Computer Science at the University of Latvia, provides a compact graphical representation of OWL 2 ontologies using UML-based notation. It features a functional programming approach for data transformation, leverages the OWL API for reading ontologies, and generates interactive visualizations on an HTML5 canvas. Future enhancements include ontology verbalization, editing, and improved visualization sharing capabilities.
OWLGrEd Ontology Visualizer
- 1. OWLGrEd Ontology Visualizer Institute of Mathematics and Computer Science (IMCS) University of Latvia Renārs Liepiņš - Mikus Grasmanis - Uldis Bojārs (CaptSolo) ISWC 2014 Developers Workshop
- 2. Online ontology visualizer http://owlgred.lumii.lv/online_visualization • compact graphical notation for OWL 2 – based on UML – OWL class expressions in diagram elements – Manchester OWL Syntax for class expressions • more info re. OWLGrEd notation: – http://owlgred.lumii.lv/notation
- 3. Ontology uploads (last 4 months): >700
- 6. koala.owl OWL API calls diagram description in JSON diagram drawing (canvas) server side running in JVM: Clojure + Java
- 7. Graph generation module • data transformation pipeline – functional programming approach – graph generation module = implemented in Clojure • uses OWL API to read the ontology • generates diagram description (in JSON) – ordered list of ~70 transformation rules – match OWL axioms -> generate diagram elements • applies styling information – style configuration file
- 9. Layout module: • calculate optimal layout based on diagram description • enrich JSON description with layout information • implemented in Java Visualization: • read diagram JSON • generate interactive visualization (zoom, pan, select) – HTML5 canvas • based on KineticJS
- 10. Future Ideas • Ontology verbalization – http://userstudies.lumii.lv/g/owlgred-cnl/extverb_on • Ontology editing • Move from canvas to vector graphics • Visualization publication and sharing
- 11. More info • OWLGrEd Ontology Visualizer paper – http://ceur-ws.org/Vol-1268/ • OWLGrEd publications – http://owlgred.lumii.lv/research_and_develop ment • E-mail us your ideas & questions – uldis.bojars@gmail.com - @CaptSolo – owlgred@lumii.lv
Editor's Notes
- #7: a modular data transformation pipeline - OWL API kudos (!!!)
- #8: attempts to show the ontology in the most compact way - >1 way to display the same information (rules to choose which way to use when)
- #12: please get in touch: - visualization can be adapted / tuned - tool can be integrated (in other apps) - or you may have other ideas how to use it