[Nepomuk] Tagging from an outside application - effects not showing in Dolphin

[Sebastian Trüg]

On 09/20/2010 12:21 PM, Luca Beltrame wrote:
> In data lunedì 20 settembre 2010 11:51:07, hai scritto:
>> Your code looks good. So we need to debug the problem.
>> could you please use the "dumpres" utility from the nepomuk
>> playground[1] to list properties of the files you tagged.
> 
> Tagging this dummy file with "test" and label "test" produces the following:
> 
> lb_work at baley:~$ dumpres "nepomuk:/res/46759a87-7956-4000-a171-ccb754ef239e"
> Resource: <nepomuk:/res/46759a87-7956-4000-a171-ccb754ef239e>
> Types:    <http://www.w3.org/2000/01/rdf-schema#Resource>
> <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#lastModified> 
> "2010-09-20T10:17:17.714Z"^^<http://www.w3.org/2001/XMLSchema#dateTime>
> <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#identifier>   
> "Password.txt"^^<http://www.w3.org/2001/XMLSchema#string>
> <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#hasTag>       
> <nepomuk:/res/bda40a79-bf37-4000-a115-261dea66cdf3>
>                                                                         <nepomuk:/res/baacee48-1409-4000-8fed-0be2ff3add46>
> <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#created>      
> "2010-09-20T10:15:53.361Z"^^<http://www.w3.org/2001/XMLSchema#dateTime>
> 
> I had to use the resourceUri() to get the URI  because if I gave the file name 
> I got
> 
> lb_work at baley:~$ dumpres Password.txt 
> Resource does not exist: file:///home/lb_work/Password.txt

That is because this file is actually not present in Nepomuk. All you
have is a resource with an identifier "Password.txt".
This happens if you do the following:

Nepomuk::Resource res("Password.txt");

since there is no relation between the string and a file.
Using

Nepomuk::Resource res(KUrl(QFileInfo("Password.txt").absolutePath()));

would be a safe bet in case there is a file "Password.txt" in the
current folder.
You have to keep in mind that KUrl does not automatically resolve
relative paths. Your application needs to take care of that.

Cheers,
Sebastian