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databasesparqldbpedia

what is the most performant way to filter out a single resource?

I'm using D3 to draw node graphs of things from DBPedia, and since ontology:wikiPageWikiLink comes up a lot, I've filtered it out using a simple FILTER statement:

FILTER (?_predicate != <http://dbpedia.org/ontology/wikiPageWikiLink>)

And in the process, I've observed a noticeable increase in the query execution time when using that line.

So, is there more performant way to filter out the IRI?

Solution

  • If you want a triple where you don't care about what the predicate is (I'm guessing the _ prefix is "ignore me") except that it's not dbpedia-owl:wikiPageWikiLink, you could simply ask for that with the property path

    ?s !dbpedia-owl:wikiPageWikiLink ?o

    Then you'd get just the results you want rather than getting more and filtering out what you don't want.