Virtuoso Open-Source Edition

VOS.VirtTipsAndTricksGuideAllGraphs

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    • VOS.VirtTipsAndTricksGuideAllGraphs(Last) -- DAVWikiAdmin? , 2017-06-13 05:37:17 Edit
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    WebDAV System Administrator 2017-06-13 05:37:17

    How to obtain all graphs Example

    1. Using SPARQL Query: The most popular way for obtaining all graphs list, presuming every graph contains at least one triple for some rdf:type of some subject, is to execute the following query: 

      SQL> SPARQL
SELECT DISTINCT ?g 
WHERE 
  { 
     GRAPH ?g {?s a ?t}
  }

    2. Using Virtuoso built-in function:: Another solution is to use the Virtuoso DB.DBA.SPARQL_SELECT_KNOWN_GRAPHS function: 

      SQL> DB.DBA.SPARQL_SELECT_KNOWN_GRAPHS();
GRAPH_IRI
VARCHAR
_______________________________________________________________________________

http://www.openlinksw.com/schemas/virtrdf#
http://localhost:8890/DAV
http://localhost:8890/dataspace
http://localhost:8890/dataspace/inf

4 Rows. -- 14 msec.

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