Useful sparql queries

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satra edited this page Mar 23, 2013 · 4 revisions

Virtuoso servers

http://computor.mit.edu:8890/sparql

Example Queries

Return named graphs in a virtuoso server

SELECT DISTINCT ?namedgraph ?label
WHERE {
  GRAPH ?namedgraph { ?s ?p ?o }
  OPTIONAL { ?namedgraph rdfs:label ?label }
}
ORDER BY ?namedgraph

Browse distinct properties

SELECT DISTINCT ?property
WHERE { [] ?property [] }
ORDER BY ?property

Browse distinct classes

SELECT DISTINCT ?class
WHERE { [] a ?class }
ORDER BY ?class