On Thu, Nov 14, 2013 at 7:42 AM, <[email protected]> wrote:
>
> I am using the following query to get all concepts that start with the word
> "Head".
>
>
> PREFIX text: <http://jena.apache.org/text#>
> PREFIX nci: <http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl#>
> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
> PREFIX owl: <http://www.w3.org/2002/07/owl#>
> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
>
> SELECT *
> WHERE {
> ?s text:query (nci:Preferred_Name 'Head') .
> ?s nci:Preferred_Name ?prefName .
> FILTER ( regex(?prefName, "^Head", "" ))
> }
>
>
> Is there a way of doing that in the text query itself without having to add a
> FILTER?
Maybe the Jena Lucene combination can do something without a FILTER,
but I don't know much about that, and can't help you out there. I
would point out, though, that you can make this FILTER less expensive
by using SPARQL 1.1's STRSTARTS:
filter( strstarts( str(?prefName), "Head" ))
--
Joshua Taylor, http://www.cs.rpi.edu/~tayloj/
