Re: [Tracker] [WIP] Application support: man pages, Tomboy, & Liferea

[Jamie McCracken <jamiemcc blueyonder co uk>]

Eyal Oren wrote:
> On 12/07/06/12/06 21:37 +0000, Jamie McCracken wrote:
> > <extraction>
> >         <Entity uri="/home/jamie/music/moonlight.ogg">
> >                 <metadata name="Audio.Title">Moonlight Sonata</metadata>
> >                 <metadata name="Audio.Artist">Beethoven</metadata>
> >         </entity>
> >
> >         <Entity uri="/home/jamie/music/moonlight.ogg">
> >                 <metadata name="Audio.Title">Moonlight Sonata</metadata>
> >                 <metadata name="Audio.Artist">Beethoven</metadata>
> >         </entity>
> > </extraction>
> just that you know, this format is exactly RDF! So instead of reinventing 
> the wheel, maybe we want to just use the RDF format for storing these 
> extracted metadata?
>
> RDF has several serialisations. In RDF/XML your data would look like:
> <tracker:Entity rdf:about="file:///home/jamie/music/moonlight.ogg">
>         <audio:title>Moonlight Sonata</audio:title>
>         <audio:artist>Beethoven</audio:title>
> </tracker:Entity>
>
> In turtle format it would be:
> <file:///home/jamie/music/moonlight.ogg> rdf:type tracker:Entity .
> <file:///home/jamie/music/moonlight.ogg> audio:title "Moonlight Sonata" .
> <file:///home/jamie/music/moonlight.ogg> audio:artist "Beethoven" .
>
> Advantages of RDF is that extending and adding 'fields' to your data is 
> trivial, and you don't need to reinvent an xml grammar. Plus exchanging and 
> merging data (e.g.  from various extractors) is trivial. So one extractor 
> could maybe do title/artist while another does last-modified-date.
>
> There are several standard RDF parsers available, Redland [1] is well 
> known, stable, fast, and lightweight. And it's in C ;-)
>
> If I understood this discussion correctly, RDF would be quite easy to use 
> here as data container. You're of course free to use any vocabulary you 
> want (instead of e.g. tracker:Entity and audio:title), those were just 
> examples.

yeah I will be restructuring the DB this weekend for the next release so 
I may as well try and follow the rdf standard as much as possible 
(although with our custom metadata)


--
Mr Jamie McCracken
http://jamiemcc.livejournal.com/