Hello Roland!
There have been some fixes for the SPARQL-support since release 2.3.3.
If you check out the latest trunk (easiest to do with "easy_install -U
rdflib==dev" if you have setuptools installed) you should get the
expected result. I ran your example and got the last value as:
[(rdflib.URIRef('#rohe0001'), None,
rdflib.Literal('[EMAIL PROTECTED]', language=None,
datatype=None), None, None), (rdflib.URIRef('#evma0001'), None,
rdflib.Literal('[EMAIL PROTECTED]', language=None, datatype=None),
None, None)]
which looks right, as I see it.
RDFLib 2.4.0 is in the pipe, and will be released real soon now. (Am I
right on this Daniel?)
Best regards,
Niklas Lindström
On 3/27/07, Roland Hedberg <[EMAIL PROTECTED]> wrote:
> Hi!
>
> I'm not sure where the problem it but the results I get are pretty weird.
>
> I'm using rdflib version 2.3.3
>
> I have a store (ConjunctiveGraph) that contains the following graphs:
>
> <rdf:RDF xmlns="http://www.openmetadir.org/om2/prim.owl#";
> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";>
>
> <Person rdf:about="#evma0001">
> <contactInfo rdf:nodeID="b2"/>
> <givenName>Eva</givenName>
> <surName>Magnusson</surName>
> </Person>
>
> <Person rdf:about="#rohe0001">
> <contactInfo rdf:nodeID="b1"/>
> <givenName>Roland</givenName>
> <surName>Hedberg</surName>
> </Person>
>
> <Email rdf:nodeID="b1">
> <address>[EMAIL PROTECTED]</address>
> </Email>
>
> <Email rdf:nodeID="b2">
> <address>[EMAIL PROTECTED]</address>
> </Email>
> </rdf:RDF>
>
> It's simply two persons, and some contact information for them.
>
> Now, if I send the following SPARQL query
>
> PREFIX a: <#>
> PREFIX c: <http://www.openmetadir.org/om2/prim.owl#>
> PREFIX b: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> SELECT ?b ?c ?d ?e
> WHERE {
> a:rohe0001 b:type c:Person .
> a:rohe0001 c:contactInfo ?a .
> ?a b:type c:Email .
> OPTIONAL { ?a c:validTo ?b } .
> OPTIONAL { ?a c:address ?c } .
> OPTIONAL { ?a c:validFrom ?d } .
> OPTIONAL { ?a c:contactType ?e } .
> }
>
> I would expect to get:
>
> [(None,"[EMAIL PROTECTED]",None,None)]
>
> and I do.
> But if I reissue the query but now modify it slightly:
>
> PREFIX c: <http://www.openmetadir.org/om2/prim.owl#>
> PREFIX b: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> SELECT ?id ?b ?c ?d ?e
> WHERE {
> ?id b:type c:Person .
> ?id c:contactInfo ?a .
> ?a b:type c:Email .
> OPTIONAL { ?a c:validTo ?b } .
> OPTIONAL { ?a c:address ?c } .
> OPTIONAL { ?a c:validFrom ?d } .
> OPTIONAL { ?a c:contactType ?e } .
> }
>
> I expected to get back:
>
> [("#rohe0001",None,"[EMAIL PROTECTED]",None,None),
> ("#evma0001",None,"[EMAIL PROTECTED]",None,None)]
>
> but I don't, I get
>
> [("#rohe0001",None,"[EMAIL PROTECTED]",None,None),
> ("#evma0001",None,"[EMAIL PROTECTED]",None,None),
> ("#rohe0001",None,"[EMAIL PROTECTED]",None,None),
> ("#evma0001",None,"[EMAIL PROTECTED]",None,None)]
>
> which was to me totally unexpected.
>
> Anyone who can tell me why I got this result ?
>
> -- Roland
>
>
>
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