Hi,
In the following query, why is ?lab not bound inside the OPTIONAL?
SELECT *
WHERE {
owl:Thing rdfs:label ?lab .
OPTIONAL{
BIND (smf:trim(?lab) as ?lab2).
BIND(smf:if(BOUND(?lab), true, false) as ?bound) . } .
}
The results of the query using TBC 3.6.1 are:
?lab = Thing
?lab2 = is unbound
?bound = false
My query is similar to this example from the SPARQL reference page so I'm
curious as to why it doesn't work:
http://www.w3.org/TR/sparql11-query/#optionals
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
SELECT ?name ?mbox
WHERE { ?x foaf:name ?name .
OPTIONAL { ?x foaf:mbox ?mbox }
}
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