SPARQL - Wikipedia, the free encyclopedia

SPARQL - Wikipedia, the free encyclopedia: "SPARQL allows users to write globally unambiguous queries. For example, the following query returns names and emails of every person in the world:

PREFIX foaf: 
SELECT ?name ?email
WHERE {
  ?person a foaf:Person.
  ?person foaf:name ?name.
  ?person foaf:mbox ?email.
}

"