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The most recent release is ontop 1.18, released on May 26, 2016.

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• Release Notes

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• Easy Tutorial: Using Ontop from Protege
• Easy Tutorial: Using Ontop API from Eclipse
• Other Tutorials
• Examples
• Frequently Asked Questions (FAQ)

Using -ontop-

• Setup Ontop as an SPARQL end-point
  • Access Ontop end-point with Twinkle
• Setup Ontop as API
  • Setup Ontop for OWLAPI
  • Setup Ontop for Sesame API
• Ontop Protege plugin User Manual
• Using R2RML
• Mapping Extraction
• Ontop from command line
  • ontop query, ontop materialize, ontop mapping, ontop bootstrap
• Using Ontop as Maven Dependencies
• Ontop Preferences
• How people use -ontop-...

Learning more

• Quest
• Ontop Mapping Language and OBDA Model
• Multiple DBs, XML, XSLs, CSV, etc.
• Mapping, Ontology, and Query Design Tips
  • Tuning to eliminate Joins
  • Tuning to eliminate Unions
• Performance Benchmarks

Troubleshooting

• Known Issues
• Troubleshooting

Developers

• Use Eclipse or IntelliJ to develop Ontop
• Git workflow
• Build Ontop bundles
• Make a new release
• Build and debug Protege plugin
• Debug Jetty with Sesame plugin in IntelliJ Idea
• Previous Releases
• Name Refactoring
• Datatype handling inside Ontop

Citations

• If you use ontop in your work, please cite the following SWJ article for the system description.
  • Diego Calvanese, Benjamin Cogrel, Sarah Komla-Ebri, Roman Kontchakov, Davide Lanti, Martin Rezk, Mariano Rodriguez-Muro, and Guohui Xiao. Ontop: Answering SPARQL Queries over Relational Databases. In: Semantic Web Journal (2016) (to appear).

• If you want to cite the techniques behind Ontop. Check Our Publications.