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Posted to users@jena.apache.org by Camel Christophe <cc...@cls.fr> on 2011/03/01 09:11:43 UTC
[Fuseki] Free Text Indexing for SPARQL
Hello again,
It seems that by default Fuseki doesn't handle text matching
(pf:textMatch) in sparql queries (Error 500: Index not found).
Is it possible to configure it to support this feature?
Thanks,
Chris
Re: [Fuseki] Free Text Indexing for SPARQL
Posted by Paolo Castagna <ca...@googlemail.com>.
Andy Seaborne wrote:
>
>
> On 01/03/11 08:11, Camel Christophe wrote:
>> Hello again,
>>
>>
>>
>> It seems that by default Fuseki doesn't handle text matching
>> (pf:textMatch) in sparql queries (Error 500: Index not found).
>>
>> Is it possible to configure it to support this feature?
>
> Not easily.
>
> The ideal would be to have an assembler description for the index and
> attach that to relevant dataset. That's what assemblers are for -
> setting up particular configurations.
>
> But there is no assembler support for LARQ
>
> Paolo - that should go in the new LARQ module, shouldn't it?
Absolutely.
There was something in ARQ but I have not tested/used extensively so
I am not sure how complete/good it is. It's here:
https://jena.svn.sourceforge.net/svnroot/jena/LARQ/trunk/src/main/java/org/apache/jena/larq/assembler/
Paolo
> So for now you left with trickery.
>
> an assmbler can load and execute arbitrary code via ja:loadClass.
>
>
> For example:
> [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
>
> kicks the TDB initialization code.
>
> You can write a class that sets up the LARQ index. I think someone (or
> more than one) have done that but I don't which project the code is in
> (it's not in the Jena system). Be nice to get hold of it as a temporary
> solution.
>
> Andy
>
>>
>>
>>
>> Thanks,
>>
>> Chris
>>
>>
Re: [Fuseki] Free Text Indexing for SPARQL
Posted by Paolo Castagna <ca...@googlemail.com>.
Andy Seaborne wrote:
>
>
> On 01/03/11 08:11, Camel Christophe wrote:
>> Hello again,
>>
>>
>>
>> It seems that by default Fuseki doesn't handle text matching
>> (pf:textMatch) in sparql queries (Error 500: Index not found).
>>
>> Is it possible to configure it to support this feature?
>
> Not easily.
>
> The ideal would be to have an assembler description for the index and
> attach that to relevant dataset. That's what assemblers are for -
> setting up particular configurations.
>
> But there is no assembler support for LARQ
>
> Paolo - that should go in the new LARQ module, shouldn't it?
Absolutely.
There was something in ARQ but I have not tested/used extensively so
I am not sure how complete/good it is. It's here:
https://jena.svn.sourceforge.net/svnroot/jena/LARQ/trunk/src/main/java/org/apache/jena/larq/assembler/
Paolo
> So for now you left with trickery.
>
> an assmbler can load and execute arbitrary code via ja:loadClass.
>
>
> For example:
> [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
>
> kicks the TDB initialization code.
>
> You can write a class that sets up the LARQ index. I think someone (or
> more than one) have done that but I don't which project the code is in
> (it's not in the Jena system). Be nice to get hold of it as a temporary
> solution.
>
> Andy
>
>>
>>
>>
>> Thanks,
>>
>> Chris
>>
>>
Re: [Fuseki] Free Text Indexing for SPARQL
Posted by Andy Seaborne <an...@epimorphics.com>.
On 01/03/11 08:11, Camel Christophe wrote:
> Hello again,
>
>
>
> It seems that by default Fuseki doesn't handle text matching
> (pf:textMatch) in sparql queries (Error 500: Index not found).
>
> Is it possible to configure it to support this feature?
Not easily.
The ideal would be to have an assembler description for the index and
attach that to relevant dataset. That's what assemblers are for -
setting up particular configurations.
But there is no assembler support for LARQ
Paolo - that should go in the new LARQ module, shouldn't it?
So for now you left with trickery.
an assmbler can load and execute arbitrary code via ja:loadClass.
For example:
[] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
kicks the TDB initialization code.
You can write a class that sets up the LARQ index. I think someone (or
more than one) have done that but I don't which project the code is in
(it's not in the Jena system). Be nice to get hold of it as a temporary
solution.
Andy
>
>
>
> Thanks,
>
> Chris
>
>