Hi Sergejs,
Can you please confirm if the same error occurs when executing the
same query via the Virtuoso isql interface by executing it as:
sparql select distinct ?assocUri {?assocUri <http://www.w3.org/
1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2002/07/
owl#ObjectProperty>. } ORDER BY ?assocUri
Also, is your server accessible remotely so we can see this problem
first hand or can you provide a sample dataset we can load locally to
see this problem.
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
On 18 Nov 2008, at 15:38, Sergejs Rikacovs wrote:
Dear Sir/Madam,
Noticed one strange thing while executing SPARQL queries on
Virtuoso through Virtuoso Sparql Query Form.
I have two queries( the only difference between them is absence of
the order by clause in the second query ) :
select distinct ?assocUri {?assocUri <http://www.w3.org/1999/02/22-
rdf-syntax-ns#type> <http://www.w3.org/2002/07/
owl#ObjectProperty>. } ORDER BY ?assocUri
This query returns following data:
<?xml version="1.0" ?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://www.w3.org/2001/sw/DataAccess/rf1/
result2.xsd">
<head>
<variable name="assocUri"/>
</head>
<results distinct="false" ordered="true">
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#exemplarAliquot</uri></binding>
</result>
<result>
<binding name="assocUri"><literal>http://www.owl-ontologies.com/
Ontology1220554345.owl#persChild</literal></binding>
</result>
<result>
<binding name="assocUri"><literal>http://www.owl-ontologies.com/
Ontology1220554345.owl#persDZTwin</literal></binding>
</result>
<result>
<binding name="assocUri"><literal>http://www.owl-ontologies.com/
Ontology1220554345.owl#persKinsman</literal></binding>
</result>
<result>
<binding name="assocUri"><literal>http://www.owl-ontologies.com/
Ontology1220554345.owl#persMZTwin</literal></binding>
</result>
<result>
<binding name="assocUri"><literal>http://www.owl-ontologies.com/
Ontology1220554345.owl#persParent</literal></binding>
</result>
<result>
<binding name="assocUri"><literal>http://www.owl-ontologies.com/
Ontology1220554345.owl#persSample</literal></binding>
</result>
<result>
<binding name="assocUri"><literal>http://www.owl-ontologies.com/
Ontology1220554345.owl#persSibling</literal></binding>
</result>
<result>
<binding name="assocUri"><literal>http://www.owl-ontologies.com/
Ontology1220554345.owl#pers_ZTwin</literal></binding>
</result>
</results>
</sparql>
The second query:
select distinct ?assocUri {?assocUri <http://www.w3.org/1999/02/22-
rdf-syntax-ns#type> <http://www.w3.org/2002/07/owl#ObjectProperty>. }
This query returns :
<?xml version="1.0" ?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://www.w3.org/2001/sw/DataAccess/rf1/
result2.xsd">
<head>
<variable name="assocUri"/>
</head>
<results distinct="false" ordered="true">
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#persDZTwin</uri></binding>
</result>
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#persKinsman</uri></binding>
</result>
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#persMZTwin</uri></binding>
</result>
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#pers_ZTwin</uri></binding>
</result>
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#persSample</uri></binding>
</result>
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#persSibling</uri></binding>
</result>
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#persChild</uri></binding>
</result>
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#persParent</uri></binding>
</result>
<result>
<binding name="assocUri"><uri>http://www.owl-ontologies.com/
Ontology1220554345.owl#exemplarAliquot</uri></binding>
</result>
</results>
</sparql>
So If I have the order by clause in my query I get literals instead
of URI`s, and If I do not have order by clause I recieve URIs, as I
would expect.
Could I ask you to give some comments on this ?
Best regards,
S. Rikacovs.
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