Andy,
> On 30 Jan 2015, at 21:09, Kingsley Idehen <kide...@openlinksw.com> wrote:
>
> On 1/30/15 12:16 PM, Andy Jenkinson wrote:
>> Thanks for your reply Hugh.
>>
>> Ah, no, we have not.
>>
>> May I ask what this does exactly? Looking at the logs, I guess it assumes
>> the presence of a URL ending in "sparql-sd” instead of “sparql”. We don’t
>> route this through to virtuoso at present so it won’t work yet, but is the
>> result of this query dependent on only the server capabilities (i.e.
>> virtuoso) or also the data contained within? I’d like to figure out if this
>> is something we need to re-run periodically.
>>
>> Cheers,
>> Andy
>
> Andy,
>
> Step missing from current docs (which is being fixed):
> Grant ROLE privileges to SPARQL user by executing the following, using the
> Conductor or iSQL commandline:
>
> GRANT SPARQL_LOAD_SERVICE_DATA to "SPARQL" ;
>
> Once executed, you can then use SPARQL-FED as expected. Basically, SPARQL
> will interrogate the remote source en route to understanding its capabilities.
>
> As what's going on in regards to endpoint interrogation? A "best effort" to
> understand the capabilities of a SPARQL endpoint via a combination of the
> following:
>
> 1. Service Description Document (@hugh this what the *sd* item is about i.e.,
> standard sparql service description)
>
> 2. SPARQL 1.1 queries.
>
> Example:
> curl -iLH "Accept: text/turtle" http://linkeddata.uriburner.com/sparql
> <http://linkeddata.uriburner.com/sparql>
>
> Links:
>
> [1] http://www.w3.org/TR/sparql11-service-description/
> <http://www.w3.org/TR/sparql11-service-description/>
> [2] http://linkeddata.uriburner.com/c/8B2FXO
> <http://linkeddata.uriburner.com/c/8B2FXO> -- SPARQL Service Description
> Ontology.
[Hugh] The document detailing the use of the use of GRANT
SPARQL_LOAD_SERVICE_DATA to "SPARQL" ; which determines the capabilities of any
SPARQL endpoint point can be accessed from:
http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtTipsAndTricksDiscoverSPARQFedCapabilitiesSPARQL
Regards
Hugh
>
>
>>> On 30 Jan 2015, at 16:45, Hugh Williams <hwilli...@openlinksw.com> wrote:
>>>
>>> Hi Andy,
>>>
>>> Have you run the Virtuoso "SPARQL LOAD SERVICE ..." to learn the
>>> capabilities of a Virtuoso remote SPARQL end point when running SPARQL FED
>>> queries as detailed at:
>>>
>>>
>>> http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtTipsAndTricksDiscoverSPARQFedCapabilities
>>>
>>> Best Regards
>>> Hugh Williams
>>> Professional Services
>>> OpenLink Software, Inc. // http://www.openlinksw.com/
>>> Weblog -- http://www.openlinksw.com/blogs/
>>> LinkedIn -- http://www.linkedin.com/company/openlink-software/
>>> Twitter -- http://twitter.com/OpenLink
>>> Google+ -- http://plus.google.com/100570109519069333827/
>>> Facebook -- http://www.facebook.com/OpenLinkSoftware
>>> Universal Data Access, Integration, and Management Technology Providers
>>>
>>>> On 30 Jan 2015, at 14:02, Andy Jenkinson <andy.jenkin...@ebi.ac.uk> wrote:
>>>>
>>>> Hi,
>>>>
>>>> When including FILTER EXISTS inside a SERVICE clause I notice that
>>>> Virtuoso reports that this is not supported:
>>>>
>>>> Virtuoso 37000 Error SP031: SPARQL compiler: The support of SPARQL 1.1
>>>> FILTER EXISTS / FILTER NOT EXISTS test syntax is not enabled for the
>>>> SERVICE at line 11 (bit 0x2000 is not set)
>>>>
>>>> Does this mean that the specified service does not support it, or the
>>>> executing endpoint does not support it? In this case, both are Virtuoso
>>>> 7.1.0 which does support the filter within a regular query.
>>>>
>>>> Cheers,
>>>> Andy
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>
> --
> Regards,
>
> Kingsley Idehen
> Founder & CEO
> OpenLink Software
> Company Web: http://www.openlinksw.com <http://www.openlinksw.com/>
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>
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leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
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