Incorrect results appear to be generated when running this against:
http://dbpedia.org/sparql
As written, two rows are returned which are correct. When the NOT EXISTS
filter is uncommented, no results are returned despite that triple clearly
not existing.
======================================
prefix : <http://dbpedia.org/ontology/>
with <http://dbpedia.org>
SELECT distinct(?o) WHERE {
?s :birthPlace ?o .
FILTER ( ?o IN (<http://dbpedia.org/resource/Colchester>, <
http://dbpedia.org/resource/Cookstown>))
# If you uncomment this line, no results will be returned.
# FILTER NOT EXISTS { ?o <THISDOESNOTEXIST> "NONEXISTENT
LITERAL"^^xsd:string .}
} LIMIT 10
======================================
Am I misinterpreting the implementation of NOT EXISTS?
--
Quentin | Clear Blue Water Pty Ltd
quent...@clearbluewater.com.au
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