Blazegraph

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).

Blazegraph
Developer(s)Systap
Stable release
2.1.5 / 19 March 2019 (2019-03-19)[1]
Preview release
2.1.6rc / 3 February 2020 (2020-02-03)[1]
Repository
Written inJava
TypeGraph database
LicenseGNU GPL (version 2)[2]
Websiteblazegraph.com

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

Early history

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

Prominent users

Notable features
  • 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)

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

References
  1. "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". W3.org. Retrieved 2018-08-29.
  9. "Announcing Blazegraph Release 1.5.0 | Blazegraph(tm)". blog.blazegraph.com. Retrieved 2018-09-17.
  10. "[Wikidata-tech] Wikidata Query Backend Update (take two!)". lists.wikimedia.org. Retrieved 2018-08-29. (The message also contains a link to the graph databases comparison performed by Wikimedia.)
  11. "Principes de l'API". Framagit.io (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". tinkerpop.apache.org. 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". GitHub.com. 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. pp. 1–6. ISBN 978-1-4503-2982-8. {{cite book}}: |journal= ignored (help)
  17. "Wikidata Query Service: User manual. Extensions". MediaWiki.org. 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". Trademarkia.com. Retrieved 2018-08-29.
  22. "blazegraph.com". ICANN WHOIS. Retrieved 2018-08-29.
  23. "Bradley Bebee". LinkedIn.com. Retrieved 2018-08-29.
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