Re: [Dbpedia-discussion] query with no result??!!

[Rumi]

Hi Parisa,

On 29-Jun-14 11:39 AM, Parisa Noorishad wrote:

Hello,





PREFIX dbpedia0: <http://dbpedia.org/ontology/>

SELECT ?Tool WHERE{

   ?Tool a dbpedia0:Work.Software .

   ?Tool dbpedia2:genre "Visualization" .

}

I found your project a great work! Thanks for working hard on that to get it this far. I am very new to DBpedia and SPARQL. I would like to use it to make a database of all visualization tools available: I run this simple query: I get no result?!!! I know at least one tool to have been set for dbpprop:genre to "Visualization" (it is Gephi)... So my question is what Am I doing wrong?

I would re-write the query like this:

PREFIX dbpedia0: <http://dbpedia.org/ontology/>
PREFIX dbpprop: <http://dbpedia.org/property/>

# object is both from type #Software and #Work
SELECT ?Tool
WHERE
 {
    ?Tool a dbpedia0:Software , dbpedia0:Work .
    ?Tool dbpprop:genre ?genre .
    FILTER ( regex (str(?genre),'Visualization' )) .
 }
LIMIT 100

-- live demo link results: http://bit.ly/1jz2oW6

or like this ( depending what you aim to find as results ):

# object is from type #Software and combine it with objects from type #Work
PREFIX dbpedia0: <http://dbpedia.org/ontology/>
PREFIX dbpprop: <http://dbpedia.org/property/>

SELECT ?Tool
WHERE
 {
  {
    ?Tool a dbpedia0:Software .
    ?Tool dbpprop:genre ?genre .
  }
  UNION
    {
    ?Tool a dbpedia0:Work .
    ?Tool dbpprop:genre ?genre .
    }
   FILTER( regex (str(?genre),'Visualization' )) .
}

-- live demo link results: http://bit.ly/Tu1mna



Hope this helps ..

Best Regards,
Rumi Kocis

Many many thanks for taking some time to answer this.

Parisa



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Open source business process management suite built on Java and Eclipse
Turn processes into business applications with Bonita BPM Community Edition
Quickly connect people, data, and systems into organized workflows
Winner of BOSSIE, CODIE, OW2 and Gartner awards
http://p.sf.net/sfu/Bonitasoft
_______________________________________________
Dbpedia-discussion mailing list
Dbpedia-discussion@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion