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Blazegraph parallelogram logo.png
Stable release
2.1.5 / 19 March 2019 (2019-03-19)[1]
Preview release
2.1.6rc / 3 February 2020 (2020-02-03)[1]
Written inJava
TypeGraph database
LicenseGNU GPL (version 2)[2] Edit this at Wikidata

Blazegraph is an open source triplestore and graph database,[3][4][5][6] developed by Systap, which is used in the Wikidata SPARQL endpoint and by other large customers. It is licensed under the GNU GPL (version 2).

Amazon acquired the Blazegraph developers and the Blazegraph open source development was essentially stopped in April 2018.[7]

Early history[edit]

The system was first known as Bigdata. Since release of version 1.5 (12 February 2015), it is named Blazegraph.[8][9]

Prominent users[edit]

Notable features[edit]

  • RDF* — an alternative approach to RDF reification,[12] which gives RDF graphs capabilities of LPG graphs;[13]
  • as the consequence of the previous, ability of querying graphs both in SPARQL and Gremlin;[14][15]
  • as an alternative to Gremlin querying, GAS abstraction over RDF graphs support in SPARQL;[16]
  • The SERVICE syntax of federated queries for functionality extending;[17]
  • Managed behavior of the query plan generator;[18]
  • Reusable named subqueries.[19]

Acqui-hiring by Amazon Web Service (AWS)[edit]

It was alleged[20] that Amazon Neptune is based on Blazegraph, as evidenced by:


  1. ^ a b "Releases - blazegraph/database". Retrieved 8 March 2020 – via GitHub.
  2. ^ "LICENSE.txt file". Retrieved 8 March 2020 – via GitHub.
  3. ^ Kiryakov, Atanas; Mariana, Damova (2011). "Chapter 7: Storing the Semantic Web: Repositories". In Domingue, John; Fensel, Dieter; Hendler, James A. (eds.). Handbook of Semantic Web Technologies. Springer-Verlag Berlin Heidelberg. pp. 271–272. ISBN 978-3-540-92912-3.
  4. ^ Thompson, Bryan; Personick, Mike; Cutcher, Martin (2014). "Chapter 8: The bigdata RDF Graph Database". In Harth, Andreas; Hose, Katja; Schenkel, Ralf (eds.). Linked data management. CRC Press. pp. 193–237. ISBN 978-1-466-58240-8.
  5. ^ Sikos, Leslie (2015). Mastering structured data on the Semantic Web. APress. p. 171. ISBN 978-1-4842-1049-9.
  6. ^ Sakr, Sh.; Wylot, M.; Mutharaju, R.; Le Phuoc, D.; Fundulaki, I. (2018). Linked Data: Storing, Querying, and Reasoning. Springer International Publishing Imprint Springer. pp. 70–71. ISBN 978-3-319-73515-3.
  7. ^ "Blazegraph fork?". GitHub. 12 April 2018.
  8. ^ "Blazegraph - Semantic Web Standards". Retrieved 2018-08-29.
  9. ^ "Announcing Blazegraph Release 1.5.0 | Blazegraph(tm)". Retrieved 2018-09-17.
  10. ^ "[Wikidata-tech] Wikidata Query Backend Update (take two!)". Retrieved 2018-08-29. (The message also contains a link to the graph databases comparison performed by Wikimedia.)
  11. ^ "Principes de l'API". (in French). Retrieved 2018-08-29.
  12. ^ Hartig, Olaf; Thompson, Bryan (2014). "Foundations of an Alternative Approach to Reification in RDF". arXiv:1406.3399 [cs.DB].
  13. ^ Hartig, Olaf (2014). "Reconciliation of RDF* and Property Graphs". arXiv:1409.3288 [cs.DB].
  14. ^ "TinkerPop-enabled Providers". Archived from the original on 2018-02-10. Retrieved 2018-08-29. (Currently, the Blazegraph logo is replaced with the Amazon Neptune logo.)
  15. ^ "Blazegraph TinkerPop Implementation". Retrieved 2018-08-29.
  16. ^ Fu, Zhisong; Personick, Michael (2014). MapGraph: A High Level API for Fast Development of High Performance Graph Analytics on GPUs. Proceedings of Workshop on GRAph Data Management Experiences and Systems. pp. 1–6. ISBN 978-1-4503-2982-8.
  17. ^ "Wikidata Query Service: User manual. Extensions". Retrieved 2018-08-29.
  18. ^ "Query Hints". Blazegraph Wiki. Retrieved 2018-08-29.
  19. ^ "Named Subquery". Blazegraph Wiki. Retrieved 2018-08-29.
  20. ^ "SPARQL and Amazon Web Service's Neptune database". Bob DuCharme's weblog. Retrieved 2018-08-29.
  21. ^ "BLAZEGRAPH Trademark of Amazon Technologies, Inc.. Serial Number: 86498414". Retrieved 2018-08-29.
  22. ^ "". ICANN WHOIS. Retrieved 2018-08-29.
  23. ^ "Bradley Bebee". Retrieved 2018-08-29.

External links[edit]