Hi Nicola,
The procedures can be found in ~/libsrc/Wi/sparql.sql of a Virtuoso open source
archive ie
https://github.com/openlink/virtuoso-opensource/blob/develop/7/libsrc/Wi/sparql.sql
Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc. // http://www.openlinksw.com/
Weblog -- http://www.openlinksw.com/blogs/
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Universal Data Access, Integration, and Management Technology Providers
On 23 Apr 2014, at 10:05, ghirardi nicola <n.ghira...@cineca.it> wrote:
> Hi Hugh,
> I am aware of the (un)defined output of DESCRIBE but here are some reason why
> I think this output is "wrong":
>
> * SPARQL rec says:
> " The DESCRIBE form " .... assembles a single RDF graph by taking a
> "description" which can come from ANY information available including the
> target RDF Dataset
> * Graphs used is not predictable
> * In the same way of undefined default-graph, DESCRIBE without specifying a
> graph could be logically the union of the information from all the graph.
> * sql:describe-mode "CBD" behave differently (result from all the graphs)
>
> That said, can you help me in changing the default behaviour or make a custom
> DESCRIBE the default one?
> In my Virtuoso 7.1 I can only find the procedures DB.DBA.SPARQL_DESC_DICT_LOD
> (and PHYSICAL) that call the default one.
> It could be very helpful for me to look at the existing ones (default and
> CBD) in order to write my own.
>
> Thanks a lot
> Nicola
>
>
> On 22/04/2014 22:05, Hugh Williams wrote:
>> Hi Nicola,
>>
>> The SPARQL specification does not define the precise output of DESCRIBE, so
>> different applications may need different results for the same subject, see
>> the following documentation for more details:
>>
>>
>> http://docs.openlinksw.com/virtuoso/rdfsparql.html#rdfsqlfromsparqldescribe
>>
>> Thus you should specify the graphs or mode to use otherwise the graphs
>> "guessed" might can be different than expected ie not the same as the select
>> query ...
>>
>> 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 22 Apr 2014, at 16:55, ghirardi nicola <n.ghira...@cineca.it> wrote:
>>
>>> Hi Hugh,
>>>
>>> You can find my test sparql endpont here:
>>> http://rdi.cineca.it/query/public/sparql
>>>
>>> Describe query:
>>> DESCRIBE
>>> <http://rlink.cineca.it/id/ResearchContent/0156586eb956402a36342f713c3f2dd6>
>>>
>>> Select query:
>>> SELECT * WHERE {
>>> <http://rlink.cineca.it/id/ResearchContent/0156586eb956402a36342f713c3f2dd6>
>>> ?a ?b.}
>>>
>>> Thanks a lot.
>>> Nicola
>>>
>>> On 22/04/2014 17:51, Hugh Williams wrote:
>>>> Hi Nicola,
>>>>
>>>> Are you able to provide a use case for recreation ie against one of our
>>>> live endpoint like dbpedia.org/sparql or lod.openlinksw.com/sparql or
>>>> datasets for local recreation ?
>>>>
>>>> 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 22 Apr 2014, at 10:02, ghirardi nicola <n.ghira...@cineca.it> wrote:
>>>>
>>>>> I'm facing the following error:
>>>>> http://answers.semanticweb.com/questions/22955/describe-in-virtuoso-unexpected-behaviour
>>>>> Running sparql describe returns only triples within some graphs and not
>>>>> the complete store.
>>>>> It gives different result running select *
>>>>> Nicola
>>>>>
>>>>>
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