Re: [Tracker] Guessing metadata and retrieval from external resources

[Adrien Bustany <abustany gnome org>]

On 12.10.2011 12:11, Sam Thursfield wrote:
> Hi
>
> On Wed, Oct 12, 2011 at 9:42 AM, Ivan Frade <ivan frade gmail com> 
> wrote:
> > On Tue, Oct 11, 2011 at 6:10 PM, Age Bosma <agebosma gmail com> 
> > wrote:
> > > What about setting an attribute for a property? Is that an option?
> > > I.e. just one title property, set with either info from a file or 
> > > an
> > > external resource, with a way to determine where it came from 
> > > afterwards.
> >
> > In RDF you cannot put attributes in properties. You could do it
> > creating a new subclass or xsd:string with the attributes you 
> > consider
> > convenient (E.G. a boolean "guessed"). Probably this would require
> > deeper changes into Tracker, because xsd:string is a basic 
> > datatype...
>
> Don't graphs give us that ability already? Data mined from the FS 
> goes
> in the fs miner's graph, data from online metadata services can go in
> a separate graph, data entered by user-driven applications goes in
> another ...

That works for multi valued properties, not single valued ones. A 
statement
can only be in one graph in Tracker, so you can't for example have two
nie:title (even in different graphs) for a same subject.

> > > > ÂNote that probably these new miners would need some UI (to ask 
> > > > the
> > > > user what movie from a list is the one in their filesystem). This 
> > > > can
> > > > be tricky (no miner has specific UI so far).
> > >
> > > I'd rather not go there. It would be very confusing for a user.
> > > We would be better of just doing all in the background. Accuracy 
> > > can be
> > > increased by using multiple resources for the same thing.
> >
> > ÂIt is even more confusing when you find movies you didn't even know
> > they exist in your movie library :) XBMC (my reference on this 
> > topic)
> > does a brilliant work guessing the movies and still it needs manual
> > input. Multiple resources won't help to classify a resource called
> > "hc-p01.avi".
>
> I agree that it's impossible to guarantee metadata, but I think the
> correct solution is to allow the user to correct the data when it's
> being viewed in applications rather than to pop up a dialog during
> extraction. Of course, this is hard :)
>
> Sam
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