‘SPARQL, pronounced “sparkle”, is the standard query language and protocol for Linked Open Data on the web or for RDF triplestores. SPARQL, short for “SPARQL Protocol and RDF Query Language”, enables users to query information from databases or any data source that can be mapped to RDF.’

From https://www.ontotext.com/knowledgehub/fundamentals/what-is-sparql/

References

https://www.w3.org/TR/sparql11-query/

https://langsamu.github.io/sparql-blockly/