Hello Hans,
First of all: the object of this relation should not be al literal but an uri
resource.
So this for collection with PID my:collection:
<isMemberOfCollection
xmlns="info:fedora/fedora-system:def/relations-external#"
rdf:resource="info:fedora/my:collection"/>
and your query will be:
prefix e: <info:fedora/fedora-system:def/relations-external#>
select ?s
where { ?s e:isMemberOfCollection <info:fedora/my:collection>}
Second: if the object of a relation is a plain literal you should not use
rdf:parseType="literal" because that is for xml. Just omit it:
<someRelation xmlns="some:namespace/">ABC_0123</someRelation>
I hope this helps (and don't forget the info:fedora/ part like I do about 10
times a day)
Egbert Gramsbergen
-----Original Message-----
From: hans [mailto:[email protected]]
Sent: donderdag 6 september 2012 10:45
To: [email protected]
Subject: [fcrepo-user] question sparql/rels-ext
Hi,
I'm trying to add some relations in my rels-ext like so:
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";>
<rdf:Description
rdf:about="info:fedora/unicum:uba.items.12903be24c35550edd1be17a7b3d9f12">
<isMemberOfCollection
xmlns="info:fedora/fedora-system:def/relations-external#"
rdf:parseType="literal">
ABC_0123
</isMemberOfCollection>
</rdf:Description>
</rdf:RDF>
When querying the triplestore with
prefix e: <info:fedora/fedora-system:def/relations-external#>
select ?s
where { ?s e:isMemberOfCollection 'ABC_0123'}
I have no results
Querying with
prefix e: <info:fedora/fedora-system:def/relations-external#>
select ?s ?o
where { ?s e:isMemberOfCollection ?o}
gives me:
"s","o"
info:fedora/unicum:uba.items.12903be24c35550edd1be17a7b3d9f12,ABC_0123
Why do i not have a result with the first query?
Regards, Hans
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