Hi Fabian,
Thanks for spotting the mistake in my test. It was late and I was
thinking about blank nodes!
Sure enough, when I made this change, I get the same behaviour as you.
Many thanks indeed, now we have something to investigate.
For the future, please note that we appreciate very much any feedback
about OWLIM, so keep your questions coming. It is the best way we have
to improve our product!
Thanks again,
barry
Barry Bishop
OWLIM Product Manager
Ontotext AD
Tel: +43 650 2000 237
email: [email protected]
www.ontotext.com
On 23/03/12 08:02, Fabian Cretton wrote:
Hi Barry,
Last time I had such a question about SPARQL, it happened it was a
real bug.
Just saying this cause I hope I am not waisting your time for a
problem on my side.
I already see a difference in your little example and my situation: in
your second insert, ex:b1 should be replaced by ex:b2
But I will try to reproduce it with a small data set, see if I can
reproduce it, and otherwise I will tell you how to create the
situation with wordNet.
During that process I could discover what I do wrong. And if not, I
will send you the information.
Thanks again
Fabian
>>> Barry Bishop <[email protected]> 22.03.2012 19:49 >>>
Hi Fabian,
Strangely, I can't seem to reproduce this. I created the following
test and this gets the expected result from the 3rd query (I tried
using a URI instead of a literal and it still worked);
@Test
public void mergedQueriesWithPropertyPaths() throws Exception {
RepositoryConnection connection = null;
TupleQueryResult result = null;
try {
connection = getRepository().getConnection();
connection.setAutoCommit(false);
String insertData =
"INSERT DATA { " +
"ex:ann1 ex:hasLookupURI ex:ws1. " +
"ex:ws1 ex:linkedTo ex:b1 . " +
"ex:b1 ex:linkedTo ex:wordsense-prey-noun-2. " +
"ex:ann1 ex:isAnnAboutText \"text\"^^xsd:string. } ";
SparqlHelper helper = new SparqlHelper(connection);
helper.update(insertData, false);
insertData =
"INSERT DATA { " +
"ex:ann2 ex:hasLookupURI ex:ws2. " +
"ex:ws2 ex:linkedTo ex:b1 ." +
"ex:b1 ex:linkedTo ex:wordsense-snake-noun-1. " +
"ex:ann2 ex:isAnnAboutText \"text\"^^xsd:string. } ";
helper.update(insertData, false);
final String query1 =
"SELECT distinct ?text WHERE { " +
"?ann1 ex:hasLookupURI ?ws1. " +
"?ws1 ex:linkedTo{1, 2} ex:wordsense-prey-noun-2. " +
"?ann1 ex:isAnnAboutText ?text. }";
helper.tupleQuery(query1, false);
helper.verify("text", "text");
helper.verifyNoBindingsRemaining();
final String query2 =
"SELECT distinct ?text WHERE { " +
"?ann2 ex:hasLookupURI ?ws2. " +
"?ws2 ex:linkedTo{1, 2} ex:wordsense-snake-noun-1. " +
"?ann2 ex:isAnnAboutText ?text. }";
helper.tupleQuery(query2, false);
helper.verify("text", "text");
helper.verifyNoBindingsRemaining();
/// now merging the two patterns should give me the same
common result, but the resultset is empty:
final String query3 =
"SELECT distinct ?text WHERE { " +
"?ann1 ex:hasLookupURI ?ws1. " +
"?ws1 ex:linkedTo{1, 2} ex:wordsense-prey-noun-2. " +
"?ann1 ex:isAnnAboutText ?text. " +
"?ann2 ex:hasLookupURI ?ws2. " +
"?ws2 ex:linkedTo{1, 2} ex:wordsense-snake-noun-1. " +
"?ann2 ex:isAnnAboutText ?text. }";
helper.tupleQuery(query3, false);
helper.verify("text", "text");
helper.verifyNoBindingsRemaining();
} finally {
Utils.close(result);
Utils.close(connection);
}
}
And this is working with the latest OWLIM 4.3 update. Can you tell
what exact version number you are using - including build number?
Also, could you try to provide some minimal dataset that reproduces
the problem?
Many thanks,
barry
On 22/03/12 08:00, Fabian Cretton wrote:
I forgot to mention something important about that "strange" behaviour:
In the final query, when I change my property path from {1, 2} to {1,
3}, the solution does appear:
SELECT distinct ?text WHERE {
?ann1 nlp:hasLookupURI ?ws1.
?ws1 wn20schema:linkedTo{1, 3} wn30:wordsense-prey-noun-2.
?ann1 nlp:isAnnAboutText ?text.
?ann2 nlp:hasLookupURI ?ws2.
?ws2 wn20schema:linkedTo{1, 3} wn30:wordsense-snake-noun-1.
?ann2 nlp:isAnnAboutText ?text.
}
Fabian
>>> Barry Norton <[email protected]> 21.03.2012 17:59 >>>
Hi, Fabian,
Is ?text bound to a literal when it succeeds in the two queries at
the top?
Barry
On 20/03/2012 14:13, Fabian Cretton wrote:
Hi,
I do have a strange behaviour that I don't understand, working with
OWLIM 4.3.
I think there is no need to provide detailed information about the
dataset to understand my problem, but will give more information if
needed.
I have some texts with lookups on wordnet.
With a query, I want to find the texts which have a look-up that is
'linkedTo' a precise wordsense.
The linkedTo property being created by my self in the store.
If I execute 2 queries about two different wordsense, the results
are correct: I get the same text as the answer
But if I merge the two wordsenses in a single query: the resultset
is empty, and I can't understand why.
Query 1: the following query returns one result:
SELECT distinct ?text WHERE {
?ann1 nlp:hasLookupURI ?ws1.
?ws1 wn20schema:linkedTo{1, 2} wn30:wordsense-prey-noun-2.
?ann1 nlp:isAnnAboutText ?text.
}
Query 2: this other query returns the same result as query 1
SELECT distinct ?text WHERE {
?ann2 nlp:hasLookupURI ?ws2.
?ws2 wn20schema:linkedTo{1, 2} wn30:wordsense-snake-noun-1.
?ann2 nlp:isAnnAboutText ?text.
}
Query 3: now merging the two patterns should give me the same common
result, but the resultset is empty:
SELECT distinct ?text WHERE {
?ann1 nlp:hasLookupURI ?ws1.
?ws1 wn20schema:linkedTo{1, 2} wn30:wordsense-prey-noun-2.
?ann1 nlp:isAnnAboutText ?text.
?ann2 nlp:hasLookupURI ?ws2.
?ws2 wn20schema:linkedTo{1, 2} wn30:wordsense-snake-noun-1.
?ann2 nlp:isAnnAboutText ?text.
}
Thank you for any help
Fabian
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