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Introducing prefLabel.org

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Pre-release presentation about http://prefLabel.org – a service for fast RDF entity label lookup.

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Introducing prefLabel.org

  1. 1. Introducing prefLabel.org Marat Charlaganov @charmarat WAI meeting 27-01-2014, VU Amsterdam
  2. 2. Common task: URI -> label Pattern: • Use URI’s as names • Retrieve human-readable labels for (some) URI’s at a later stage
  3. 3. API’s return URI’s
  4. 4. Emergent practices
  5. 5. Conventional Solutions • URI dereference • Guess the SPARQL endpoint • Use a SPARQL endpoint with loads of triples (e.g. http://lod.openlinksw.com/sparqrl)
  6. 6. Conventional Solutions • URI dereference • Guess the SPARQL endpoint • Use a SPARQL endpoint with loads of triples (e.g. http://lod.openlinksw.com/sparqrl) Concerns: • Non-derefernceable URI’s, constructing a query requires prior knowledge of the data, postprocessing of the results, downtime, latency
  7. 7. Less Conventional • Sindice API • …
  8. 8. Proposal prefLabel.org • Best-effort delivery of a single humanreadable label for a given URI + Simple API + Fast
  9. 9. Loaded Data • • • • DBpedia Wikidata (using https://github.com/mkroetzsch/wda) Freebase ~58M labels in total
  10. 10. Use case: YASGUI
  11. 11. Ideas • Reverse lookup: label -> URI • Provenance requests (PROV-AQ?) • Fetch unknown labels with conventional methods • Provide minimal SPARQL interface for use in federated queries • …
  12. 12. Questions: • • • • Can YOU use this? Which datasets to load? Missing features? …

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