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As I said and showed with my exmaple, it works at least with Apache Jena
in-memory SPARQL engine.
> Hello,
>
> On 01/09/2017 02:11 PM, Lorenz Buehmann wrote:
>> It was not my question, but again, the property path * operator is used
>> in his query - and this can also mean
dfs: <http://www.w3.org/2000/01/rdf-schema#>
select * where {
?s a/rdfs:subClassOf* ex:A
}
Result 4
| s |
| ex:a |
But maybe Jena is wrong here(although it returns what I would expect,
but I'm not a SPARQL expert). I'll try to contact one of the develo
equivalent
to the constraint
?A rdf:type/rdfs:subClassOf* :mytype1 .
Cheers,
Lorenz
On 09.01.2017 00:50, Hugh Williams wrote:
> Hi Oliver,
>
> There are no rdfs:subClassOf or rdfs:subPropertyOf relations in the
> graph of the inserted data:
>
> SQL> SPARQL SELECT * FROM
Hello Kingsley,
thank you, this helps a lot!
Kind regards,
Lorenz
> On 11/11/16 4:09 AM, Lorenz B. wrote:
>> Dear Virtuoso team,
>>
>> I've got a small question which came up during the discussion here
>> [1]. Which kind of REGEX engine/flavor does Virtuoso (7.
/questions/40437602/sparql-regex-flavor/
Kind regards,
Lorenz
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Lorenz Bühmann
AKSW group, University of Leipzig
Group: http://aksw.org - semantic web research center
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Hello Jerven,
good catch. Now, I'm wondering whether BIND has to be evaluated after
the FILTER or if this isn't specified in the SPARQL standard. Or does
the order in the SPARQL query matters in that case like it does for
OPTIONAL clauses?
Kind regards,
Lorenz
> Hi All,
>
&g
" } }
}
FILTER ( strlen(str(?s)) = 3 )
BIND(substr(str(?s), 3, 1) AS ?lastChar)
}
Kind regards,
Lorenz
> Hi Hugh,
>
> producing a minimal test case to reproduce the behaviour is indeed the
> difficult part. I've been trying to do that without success. So fa
ilter by length first?
Kind regards,
Lorenz
> Unfortunately, using STRDT(?literal, xsd:string) doesn't make
> difference and the error is still thrown. ?literal is already a string.
>
> - Jindřich
>
> --
> Jindřich Mynarz
> http://mynarz.net/#jindrich
>
> On Tue,
Hello Jindřich,
to my understanding, the assumption is that any SPARQL update will be
executed completely, otherwise it fails with some error messages or the
like.
Cheers,
Lorenz
> Hi Hugh,
>
> thanks, that supports my assumption. Are you aware of any other
> mechanism to tell
Hi,
just as a follow-up question:
I know it supports inter-query parallelization, but does it also support
intra-query parallelization, i.e. using multiple threads to compute the
result of a single query? If yes, which parameter is used to configure this?
Cheers,
Lorenz
On 12.09.2016 05:57
I don't see any need for inference here.
It's not clear whether Apple is a class or an individual. If it's an
individual, and that's what definitely follows from
:Bassam :eat :Apple
then I read your first triple as
:Apple rdf:type :Fruit
and the query would be
SELECT ?s WHERE {
?s :eats ?x .
There should indeed be no error, and if - as Hugh said the service is
unavailable - then it's the obvious result to get HTTP 404 response.
On 29.07.2016 13:47, Balazs Varhegyi wrote:
Hi Hugh,
It seems like what Lorenz said:
Without the doing the checkpoint this curl works: "cur
Hi Hugh,
I guess Jena gets no connection to the SPARQL service at the time
Virtuoso is temporarily inaccessible
and thus simply returns a 404 error.
Cheers,
Lorenz
On 28.07.2016 15:03, Hugh Williams wrote:
Hi Balazs,
From your stackoverflow post the
like RDF, RDFS or
OWL for your domain as you did with rdf:plays . That's for sure far away
from best-practice.
Kind regards,
Lorenz
> I ran the following query on Virtuoso:
>
> [code]PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> SELECT DISTINCT ?X
> WHER
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Lorenz Bühmann
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Group: http://aksw.org - semantic web research center
--
hat's
what the developers should know.
Kind regards,
Lorenz
No feedback?
Nobody has seen "Virtuoso37000 Error SQ156: Internal Optimized
compiler error : supposed to have ose in bracket outer in
rdfinf.c:2636." in the past?
Kind regards,
Pantelis Natsiavas
2016-02-13 14
to find a dataset"?
Lorenz
Hi every body
I am trying to use bio2rdf, but i want to link to find a dataset.
This link http://bio2rdf.org/bio2rdf.dataset_vocabulary give me an error.
any suggestion of other link could be helpfull.
Kind regards
Fatma
2016-02-12 14:55 GMT+01:00 Pan
Hello Cong,
the problem is that the first query is illegal SPARQL Syntax, but
Virtuoso allows such queries nevertheless.
You can avoid the parsing to a Query object if you use the
QueryEngineHttp class instead, which only works with the query string
and does not do any syntax checks.
Lorenz
Apache JENA supports full SPARQL 1.1 and thus also FILTER IN clause.
Lorenz
> Hi Lorena,
>
> Thanks Lorena. Indeed, this Javascript library seems so powerful. I just
> had a quick look and found that the library also supported 'IN'.
> However, sorry to not mention
edia.org/ontology/formationDate> ?date.
FILTER(STR(?date) = "2009-02-15")
}
which is also some kind of strange as I would assume the lexical form is
just "2009-02-15+02:00" .
Is there anythi
Hello Hugh,
if you set the default graph to http://dbpedia.org at
http://lod.openlinksw.com/sparql the same behaviour that Claus spotted
at DBpedia occurs, which is also strange because it needs much more time
on a smaller graph compared to the whole LOd Cloud.
Kind regards,
Lorenz
Hi
The labels are contained in the DBpedia ontology.
Lorenz
On 07/31/2014 12:27 PM, Jaana Takis wrote:
Hi Hugh,
this does not work unfortunately, I get the exact same issue running
your query on my local Virtuoso sparql endpoint:
p label
http://purl.org/dc/terms/subject"Subjec
Hi Rumi,
I'm just wondering about your answer. Is this a bug in Virtuoso or not?
I would assume that an OPTIONAL should not influence the number of the
resultset, so why does the second query returns a different number?
Kind reagrds,
Lorenz
On 06/26/2014 02:45 PM, Rumi wrote:
Hi Olga,
A%2F%2Fdbpedia.org%2Fresource%2FJohn_the_Baptist%3E+a+%0D%0A%3FmoreSpecificType+.%0D%0A%3FmoreSpecificType+%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23subClassOf%3E%2B+%3Ftype.%7D%0D%0A%7D&format=text%2Fhtml&timeout=30&debug=on
Thanks again,
Lorenz Bühmann
On 02/06/2014 02
tp://dbpedia.org/resource/John_the_Baptist%3E%20a?moreSpecificType%20.?moreSpecificType%20%3Chttp://www.w3.org/2000/01/rdf-schema#subClassOf>+
?type.}}
Thank you for the help,
Lorenz Bühmann
On 02/06/2014 02:22 PM, Kingsley Idehen wrote:
On 2/6/14 7:57 AM, Lorenz Bühmann wrote:
Hi,
I just want
rce/Pope_John_Paul_I it returns, among others,
only the class http://dbpedia.org/ontology/ChristianBishop from the
DBpedia ontology namespace.
Am I doing something wrong, or is this a (known) bug in Virtuoso?
Regards,
Lorenz Bühmann
mat=text%2Fhtml&timeout=3&debug=on
and here
[3]
http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=select+COUNT%28DISTINCT+%3Fs%29+where+%7B%3Fs+dbpedia-owl%3AbirthDate+%3Fo1.%3Fs+dbpedia-owl%3AbirthDate+%3Fo2.FILTER%28%3Fo1+%3C+%3Fo2+%7C%7C+%3Fo2+%3C+%3Fo1%29%7D&
have more than one
birthDate, but also returns resource with only one birthDate, e.g.
http://dbpedia.org/resource/Avet_Terterian 1929-07-291929-07-29
Kind regards,
Lorenz
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__01 => '42000',
__02 => 'The estimated execution time -742267904 (sec) exceeds the limit
of 1200 (sec).'
SPARQL query:
SELECT * WHERE { <http://dbpedia.org/ontology/Place>
<http://www.w3.org/2002/07/owl#unionOf> ?o0. { OPTIONAL { ?o0 ?p1 ?o1.
}} }
Kind regards,
Lorenz
NAL { ?o0 ?p1 ?o1. }} }
Kind regards,
Lorenz
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