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Posted to dev@jena.apache.org by "Richard Walker (JIRA)" <ji...@apache.org> on 2018/09/07 02:41:00 UTC
[jira] [Created] (JENA-1600) arq not finding content included with
namedGraph
Richard Walker created JENA-1600:
------------------------------------
Summary: arq not finding content included with namedGraph
Key: JENA-1600
URL: https://issues.apache.org/jira/browse/JENA-1600
Project: Apache Jena
Issue Type: Bug
Affects Versions: Jena 3.1.1
Reporter: Richard Walker
I think this is similar to JENA-1261 and JENA-1419. I am using 3.8.0, but it seems this issue arose in 3.1.1, was fixed in 3.2.0, and then arose again in 3.3.0 and continues with subsequent releases.
Consider an empty file {{empty.ttl}}, and a file {{control.ttl}} with these contents:
{code}
@prefix void: <http://rdfs.org/ns/void#> .
@prefix ov: <http://open.vocab.org/terms/> .
<https://gcmdservices.gsfc.nasa.gov/platforms-dataset> a void:Dataset .
<https://gcmdservices.gsfc.nasa.gov/platforms-dataset> void:uriSpace <https://gcmdservices.gsfc.nasa.gov/> .
{code}
and this trivial query {{summary-test-select.arq}}:
{code}
SELECT ?s ?p ?o
FROM NAMED <control.ttl>
WHERE {
GRAPH <control.ttl> {
?s ?p ?o
}
}
{code}
Now compare the output of some releases from 3.1.0 onwards. First, 3.1.0:
{code}
~/Software/apache-jena-other-releases/apache-jena-3.1.0/bin/arq --data=empty.ttl --query=summary-test-select.arq --namedGraph=control.ttl --base .
------------------------------------------------------------------------------------------------------------------------------------------------------
| s | p | o |
======================================================================================================================================================
| <https://gcmdservices.gsfc.nasa.gov/platforms-dataset> | <http://rdfs.org/ns/void#uriSpace> | <https://gcmdservices.gsfc.nasa.gov/> |
| <https://gcmdservices.gsfc.nasa.gov/platforms-dataset> | <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> | <http://rdfs.org/ns/void#Dataset> |
------------------------------------------------------------------------------------------------------------------------------------------------------
{code}
Now 3.1.1:
{code}
~/Software/apache-jena-other-releases/apache-jena-3.1.1/bin/arq --data=empty.ttl --query=summary-test-select.arq --namedGraph=control.ttl --base .
-------------
| s | p | o |
=============
-------------
{code}
Now 3.2.0:
{code}
~/Software/apache-jena-other-releases/apache-jena-3.2.0/bin/arq --data=empty.ttl --query=summary-test-select.arq --namedGraph=control.ttl --base .
------------------------------------------------------------------------------------------------------------------------------------------------------
| s | p | o |
======================================================================================================================================================
| <https://gcmdservices.gsfc.nasa.gov/platforms-dataset> | <http://rdfs.org/ns/void#uriSpace> | <https://gcmdservices.gsfc.nasa.gov/> |
| <https://gcmdservices.gsfc.nasa.gov/platforms-dataset> | <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> | <http://rdfs.org/ns/void#Dataset> |
------------------------------------------------------------------------------------------------------------------------------------------------------
{code}
And 3.3.0:
{code}
~/Software/apache-jena-3.3.0/bin/arq --data=empty.ttl --query=summary-test-select.arq --namedGraph=control.ttl --base .
-------------
| s | p | o |
=============
-------------
{code}
Same empty result with 3.4.0 and 3.8.0.
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