SPARQL Web-Querying Infrastructure: Ready for Action?
- Carlos Buil-ArandaAffiliated withDepartment of Computer Science, Pontificia Universidad Católica de Chile
- , Aidan HoganAffiliated with
- , Jürgen UmbrichAffiliated withFujitsu (Ireland) Limited, Swords, Co.
- , Pierre-Yves VandenbusscheAffiliated withFujitsu (Ireland) Limited, Swords, Co.
Hundreds of public SPARQL endpoints have been deployed on the Web, forming a novel decentralised infrastructure for querying billions of structured facts from a variety of sources on a plethora of topics. But is this infrastructure mature enough to support applications? For 427 public SPARQL endpoints registered on the DataHub, we conduct various experiments to test their maturity. Regarding discoverability, we find that only one-third of endpoints make descriptive meta-data available, making it difficult to locate or learn about their content and capabilities. Regarding interoperability, we find patchy support for established SPARQL features like ORDER BY as well as (understandably) for new SPARQL 1.1 features. Regarding efficiency, we show that the performance of endpoints for generic queries can vary by up to 3–4 orders of magnitude. Regarding availability, based on a 27-month long monitoring experiment, we show that only 32.2% of public endpoints can be expected to have (monthly) “two-nines” uptimes of 99–100%.
- SPARQL Web-Querying Infrastructure: Ready for Action?
- Book Title
- The Semantic Web – ISWC 2013
- Book Subtitle
- 12th International Semantic Web Conference, Sydney, NSW, Australia, October 21-25, 2013, Proceedings, Part II
- pp 277-293
- Print ISBN
- Online ISBN
- Series Title
- Lecture Notes in Computer Science
- Series Volume
- Series ISSN
- Springer Berlin Heidelberg
- Copyright Holder
- Springer-Verlag Berlin Heidelberg
- Additional Links
- Industry Sectors
- eBook Packages
- Editor Affiliations
- 16. Knowledge Media Institute, The Open University
- 17. Massachusetts Institute of Technology
- 18. IBM Research
- 19. Free University Amsterdam
- 20. Technical University Darmstadt
- 21. Digital Enterprise Research Institute, National University of Ireland
- 22. VU Amsterdam
- 23. Stanford University
- 24. IBM Research
- 25. University of California
- Author Affiliations
- 26. Department of Computer Science, Pontificia Universidad Católica de Chile, Chile
- 27. Fujitsu (Ireland) Limited, Swords, Co., Dublin, Ireland
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