Hi,
I think I found a bug with property paths and optional statements in VOS7
(DBpedia sparql endpoint)
See the following queries. Q1 runs fine but Q2 doesn't. If I remove the '+'
from Q2 (Q3) then the query returns fine again. So there seems to be a bug
with multiple optional statements and property paths
(ps the example does not make sense)
Best,
Dimitris
====
Q1
====
select * {
?class rdfs:subClassOf+ dbpedia-owl:Person .
OPTIONAL { ?class rdfs:subPropertyOf ?subproperty } .
}
====
Q2
====
select * {
?class rdfs:subClassOf+ dbpedia-owl:Person .
OPTIONAL { ?class rdfs:subPropertyOf ?subproperty } .
OPTIONAL { ?class rdfs:domain ?domain } .
OPTIONAL { ?class rdfs:range ?range } .
}
====
Q3select * {
?class rdfs:subClassOf dbpedia-owl:Person .
OPTIONAL { ?class rdfs:subPropertyOf ?subproperty } .
OPTIONAL { ?class rdfs:domain ?domain } .
OPTIONAL { ?class rdfs:range ?range } .
}
--
Kontokostas Dimitris
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