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SPARQLStore the component to establish a connection between SMW and a triple store.
Further Information
Short name: SPARQLStore
Provided by: Semantic MediaWiki
Added: 1.6
Removed: still in use
Keyword : RDF · SPARQL · Triple store
Table of Contents

The SPARQLStore is the name of the component that handles the communication (including data management) between Semantic MediaWiki and a triple-store and the transformation of #ask into a SPARQL query representation.

Features and limitations

Scalability and stability

Starting with SMW 2.3, SPARQLStore supports all native features of the SQLStore including redirects for queries and property/category hierarchies (given that the back-end supports SPARQL 1.1)

  • W3C RDF Store Benchmarking lists RDF benchmarks, benchmarking results and papers
  • Comparison on Blazegraph vs. Sesame vs. Virtuoso
  • Given the fact that DBpedia is facilitating Virtuoso 7 successfully (probably the commercial version) [0] it should be regarded as reliable and stable [2, 3, 4]
  • Quoting a Sesame developer "...on more recent hardware Sesame's native store scales to about 150-200 million triples. Sesame development focuses on API usability, standards compliance, parsing performance ..." but supports graph database like Systap Blazegraph or Ontotext GraphDB. [1]
  • If SPARQL compliance is required Fuseki and Sesame are good candidates. If authorization is required Virtuoso and Fuseki (Version 2 with Shiro) is the choice to make. For a comparison on large datasets, see [5].
  • 4store showed a rather degrading performance when run our test suite in comparison to any other supported repository (also it is missing SPARQL 1.1 support)
  • ARC2 (as a native PHP/MySQL) seems not a real alternative due to "ARC2 is now in a stable state with no further feature additions planned". [6]
  • Neo4J has not been tested (see comments made about Virtuoso/Neo4J [7])
  • Blazegraph has been selected by the Wikidata project to serve the "Wikidata Query Service" [8]

Available repository connectors

Help pageConnectorDescriptionSMW
Help:SPARQLStore FourstoreHttpDatabaseConnector4store4store access point to the SPARQLStore2.0
Help:SPARQLStore FusekiHttpDatabaseConnectorFusekiJena Fuseki access point to the SPARQLStore2.0
Help:SPARQLStore GenericHttpDatabaseConnectorGeneric (Default)Default access point for the SPARQLStore2.0
Help:SPARQLStore VirtuosoHttpDatabaseConnectorVirtuosoVirtuoso opensource access point to the SPARQLStore2.0
Help:SPARQLStore and BlazegraphBlazegraphBlazegraph access point to the SPARQLStore2.3
Help:SPARQLStore and SesameSesameopenrdf-sesame access point to the SPARQLStore2.1

Available configuration parameters

SPARQL requests, whether queries or updates, are exchanged through web services. This means that requests are sent to and data is received from URLs that specify the location of the according service. This location is determined by the SPARQL database and by its configuration. The respective configuration parameters are shown in the following table:

$smwgDefaultStoreSets the storage backend to be used for the semantic data (SQL or SPARQL).1.0
$smwgSparqlUpdateEndpointSets the endpoint (service URL) for updating (update queries) the SPARQL database.1.6.0
$smwgSparqlDataEndpointSets the endpoint (service URL) for data (SPARQL over HTTP service) on the SPARQL database.1.6.0
$smwgSparqlDatabaseDefines the SPARQL custom database connectors1.6.0
$smwgSparqlQueryEndpointSets the endpoint (service URL) for querying (reading queries like SELECT) the SPARQL database.1.6.0
$smwgSparqlDefaultGraphSets the identifier (graph) of the SPARQL database.1.7.0
$smwgSparqlDatabaseConnectorIdentifies a database connector that ought to be used together with the semantic data store.2.0
$smwgSparqlQFeaturesDefines the SPARQL query features that are expected to be supported by the repository of the identifier (graph) of the SPARQL database.2.3.0
$smwgSparqlRepositoryConnectorForcedHttpVersionExplicitly force a CURLOPT_HTTP_VERSION for the endpoint communication2.3.1




[2] [3] [4]





See also