[redland-dev] RDQL - Objective C/Cocoa/ OS X ?

[René Puls]

Hi,

Am 14.09.2005 um 20:17 schrieb Mr cool:
> Has anyone tried SPARQL/RDQL RDF queries using Objective C /  
> Cocoa / OS X ?
>
> The name/value of bindings doesn't seem to get populated from the  
> query.
> (However I am able to populate my storage/model manually and  
> display them)

You are querying an empty model in your sample code. Adding:

[myredlandmodel loadURL:mynsurl withContext:nil];

... before executing the query gives me these results:

2005-09-16 15:32:39.956 otest[512] 1 - Number of bindings
2005-09-16 15:32:39.977 otest[512] Name at binding 0 is name
2005-09-16 15:32:39.987 otest[512] Count 1
2005-09-16 15:32:39.988 otest[512] Jim Hendler - Literal Value
2005-09-16 15:32:39.990 otest[512] Count 2
2005-09-16 15:32:39.990 otest[512] Dan Brickley - Literal Value
2005-09-16 15:32:39.991 otest[512] Count 3
2005-09-16 15:32:39.991 otest[512] Phil McCarthy - Literal Value

... and so on, until count 17. Is this the output you expected?

> I also tried querying a local rdf using the "SELECT ... FROM
> <file.rdf> ..." , but that results in "Failed to make triples source."
> error.

Not sure about that; have you tried giving a full path instead of a  
relative one? Perhaps your current working directory is not what you  
expect it to be.

If it still doesn't work, please post more sample code. :-)

Kind regards,
René Puls