Hi -
I have this problem with a CONSTRUCT query that I get out of memory errors on
and I don't really understand how and I was wondering if some of you could help
me understand why.
The reason I don't understand it is that the query works up until I add a new
triple to the query. What I mean is that it works if you remove the line
`dbpedia-owl:abstract ?abstract.` (and replace the previous `;` with `.`).
How I see it the query should be able to run and return a result, especially
since a more general query does. Perhaps I just don't understand the execution
sequence of a sparql-query and that is the problem I am having?
Regards,
Bjarte Johansen
---
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX : <http://dbpedia.org/resource/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>
PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX test: <test/>
CONSTRUCT {
?loc rdfs:label ?label;
geo:lat ?lat;
geo:long ?long;
dbpedia-owl:abstract ?abstract;
foaf:isPrimaryTopicOf ?source;
dcterms:subject ?subject;
?relation ?second.
?second rdfs:label ?label2;
dbpedia-owl:abstract ?abstract2.
?subject rdfs:label ?topic.
} WHERE {
?loc geo:lat ?lat;
geo:long ?long;
dbpedia-owl:abstract ?abstract;
dcterms:subject ?subject;
foaf:isPrimaryTopicOf ?source;
rdfs:label ?label.
?subject rdfs:label ?topic.
?loc ?relation ?second.
?second rdfs:label ?label2;
dbpedia-owl:abstract ?abstract2.
FILTER ( langMatches(lang(?label), "en") ).
FILTER ( langMatches(lang(?abstract), "en") ).
FILTER ( langMatches(lang(?topic), "en") ).
FILTER ( langMatches(lang(?abstract2), "en") ).
FILTER ( langMatches(lang(?label2), "en") ).
FILTER (?long > 5.3 && 5.4 > ?long).
FILTER (?lat > 60.38 && ?lat < 60.40).
FILTER NOT EXISTS {
?loc rdf:type dbpedia-owl:City.
}
FILTER NOT EXISTS {
?loc owl:sameAs ?second.
}
}
>
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