Re: [Aperture-devel] resource nodes-in-between (was:Usage of MP3FileExtractor)

[Leo S. <leo...@df...>]

It was Nico Heid who said at the right time 07.05.2008 16:35 the 
following words:
> Hi,
> But I have one follow up question.
> If I look at the output -> container.getModel().writeTo(new PrintWriter(System.out),Syntax.Ntriples);
>
> I get something like this: (shortened)
>
> <myTest> <http://www.semanticdesktop.org/ontologies/2007/05/10/nid3#title> "Sonata No. 1 in F Minor, Op. 2 No. 1 - IV. Prestissimo" .
> <myTest> <http://www.semanticdesktop.org/ontologies/2007/05/10/nid3#composer> <urn:uuid:17fb7051-55f8-4f50-ba73-9ad5ea9f5625> .
> <urn:uuid:17fb7051-55f8-4f50-ba73-9ad5ea9f5625> <http://www.semanticdesktop.org/ontologies/2007/03/22/nco#fullname> "Ludwig van Beethoven" .
>
>
> I don't quite understand this. I need to access composer. 
> But container.getString(NID3.composer) returns null;
>   
The composer is represented as a resource, a kind of 
"resource-in-between" the string and the song.

to get LudwigVan, you get the resource of the artist, then his fullname
something like this (not tested, I used RDFContainer here for 
convenience, any other RDF way to walk the graph is ok)

URI composer = container.getURI(NID3.composer);
RDFContainer composerContainer = new 
RDFContainerImpl(container.getModel(), composer);
String fullname = composerContainer.getString(NCO.fullname);

hope this does the trick?

The reason to model it this way is the flexibility of RDF.
because other formats may split up fistname/secondname and also
the composer is represented as a "contact", so its possible to add (in 
RDF) an address or something
else to it.

kind regards
Leo

> Nico
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference 
> Don't miss this year's exciting event. There's still time to save $100. 
> Use priority code J8TL2D2. 
> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
> _______________________________________________
> Aperture-devel mailing list
> Ape...@li...
> https://lists.sourceforge.net/lists/listinfo/aperture-devel
>   


-- 
____________________________________________________
DI Leo Sauermann       http://www.dfki.de/~sauermann 

Deutsches Forschungszentrum fuer 
Kuenstliche Intelligenz DFKI GmbH
Trippstadter Strasse 122
P.O. Box 2080           Fon:   +49 631 20575-116
D-67663 Kaiserslautern  Fax:   +49 631 20575-102
Germany                 Mail:  leo...@df...

Geschaeftsfuehrung:
Prof.Dr.Dr.h.c.mult. Wolfgang Wahlster (Vorsitzender)
Dr. Walter Olthoff
Vorsitzender des Aufsichtsrats:
Prof. Dr. h.c. Hans A. Aukes
Amtsgericht Kaiserslautern, HRB 2313
____________________________________________________