Vous pouvez le faire avec une requête SPARQL:
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[email protected] $ cat > test.nq
<http://example.org/a> <http://example.org/p> "in graph one" <http://example.org/graph/one> .
<http://example.org/a> <http://example.org/p> "in graph two" <http://example.org/graph/two> .
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[email protected] $ mkdir tdb
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[email protected] $ tdbloader --loc=tdb test.nq
-- Start triples data phase
** Load empty triples table
-- Start quads data phase
** Load empty quads table
Load: test.nq -- 2011/05/27 08:55:59 BST
-- Finish triples data phase
-- Finish quads data phase
2 quads loaded in 0.05 seconds [Rate: 37.74 per second]
-- Start quads index phase
** Index GSPO->GPOS: 2 slots indexed
** Index GSPO->GOSP: 2 slots indexed in 0.00 seconds [Rate: 2,000.00 per second]
** Index GSPO->POSG: 2 slots indexed
** Index GSPO->OSPG: 2 slots indexed
** Index GSPO->SPOG: 2 slots indexed
-- Finish quads index phase
** 2 quads indexed in 0.01 seconds [Rate: 153.85 per second]
-- Finish triples load
-- Finish quads load
** Completed: 2 quads loaded in 0.09 seconds [Rate: 23.26 per second]
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[email protected] $ tdbquery --loc=tdb "select ?g where {graph ?g {?s ?p ?o}}"
----------------------------------
| g |
==================================
| <http://example.org/graph/one> |
| <http://example.org/graph/two> |
----------------------------------
Modifier
Désolé, vous venez de réaliser que demandé spécifiquement pour la liste des graphes nommés de l'API. Alors, comme une alternative à ce qui précède:
String directory = "./tdb";
Dataset dataset = TDBFactory.createDataset(directory);
Iterator<String> graphNames = dataset.listNames();
while (graphNames.hasNext()) {
String graphName = graphNames.next();
....
}