Blazegraph is an open source triplestore and graph database, written in Java. It has been abandoned since 2020. One user is Wikimedia Deutshland, 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.
Early history The system was first known as Bigdata. Since release of version 1.5 (12 February 2015), it is named Blazegraph.
Prominent users The Wikimedia Foundation uses Blazegraph for the Wikidata Query Service, which is a SPARQL endpoint. (The message also contains a link to the graph databases comparison performed by Wikimedia.) Sophox, a fork of the Wikidata Query Service, specializes in OpenStreetMap queries. The Datatourisme project uses Blazegraph as the database platform; however, GraphQL is used as the query language instead of SPARQL.
Notable features RDF* — an alternative approach to RDF reification, which gives RDF graphs capabilities of graphs; as the consequence of the previous, ability of querying graphs both in SPARQL and Gremlin; (Currently, the Blazegraph logo is replaced with the Amazon Neptune logo.) as an alternative to Gremlin querying, abstraction over RDF graphs support in SPARQL; The SERVICE syntax of federated queries for functionality extending; Managed behavior of the query plan generator; Reusable named subqueries.
Acqui-hiring by Amazon Web Service (AWS) Amazon Neptune is based on Blazegraph. acquiring of the Blazegraph trademark by AWS; acquiring of the blazegraph.com domain name by AWS; transition of many employees (including CEO) to AWS.
References
External links
Page on DB-Engines.com