SPARQL

SPARQL (pronounced "sparkle" /ˈspɑːkəl/, a recursive acronym[2] for SPARQL Protocol and RDF Query Language) is an RDF query language—that is, a semantic query language for databases—able to retrieve and manipulate data stored in Resource Description Framework (RDF) format. https://en.wikipedia.org/wiki/SPARQL

https://en.wikipedia.org/wiki/List_of_SPARQL_implementations