Blazegraph
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| Blazegraph | |
|---|---|
| File:Blazegraph parallelogram logo.png | |
| Developer | Systap |
| Stable release | 2.1.5
/ 19 March 2019[1] |
| Preview release | 2.1.6rc
/ 3 February 2020[1] |
| Repository |
|
| Written in | Java |
| Engine | |
| Type | Graph database |
| License | GNU GPL (version 2)[2] |
Blazegraph is an open source triplestore and graph database,[3][4][5][6] written in Java. It has been abandoned since 2020 and is known to be used in production by WMDE for the Wikidata SPARQL endpoint. 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 | edit source]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 | edit source]- The Wikimedia Foundation uses Blazegraph for the Wikidata Query Service, which is a SPARQL endpoint.[10]
- Sophox, a fork of the Wikidata Query Service, specializes in OpenStreetMap queries.[11]
- The Datatourisme project uses Blazegraph as the database platform; however, GraphQL is used as the query language instead of SPARQL.[12]
Notable features
[edit | edit source]- RDF* — an alternative approach to RDF reification,[13] which gives RDF graphs capabilities of LPG graphs;[14]
- as the consequence of the previous, ability of querying graphs both in SPARQL and Gremlin;[15][16]
- as an alternative to Gremlin querying, GAS abstraction over RDF graphs support in SPARQL;[17]
- The
SERVICEsyntax of federated queries for functionality extending;[18] - Managed behavior of the query plan generator;[19]
- Reusable named subqueries.[20]
Acqui-hiring by Amazon Web Service (AWS)
[edit | edit source]Amazon Neptune is based on Blazegraph.[21][22]
- acquiring of the Blazegraph trademark by AWS;[23]
- acquiring of the blazegraph.com domain name by AWS;[24]
- transition of many employees (including CEO) to AWS.[25]
References
[edit | edit source]- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (The message also contains a link to the graph databases comparison performed by Wikimedia.)
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (Currently, the Blazegraph logo is replaced with the Amazon Neptune logo.)
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
External links
[edit | edit source]- Lua error in Module:Official_website at line 94: attempt to index field 'wikibase' (a nil value).
- Page on DB-Engines.com