Re: Proposing Tracker for inclusion into GNOME 2.18

[James Livingston <doclivingston gmail com>]

On Wed, 2006-10-25 at 11:20 +0100, Jamie McCracken wrote:
> James "Doc" Livingston wrote:
> > On Tue, 2006-10-24 at 21:33 +0100, Jamie McCracken wrote:
> >> A contact can only have one metadata value per type (this is a primary 
> >> key constraint)
> >>
> >> With everything mapped 1:1 you can then use RDF query to search them
> > 
> > On Tue, 2006-10-24 at 23:39 +0100, Jamie McCracken wrote:
> >> denormalise it into Contact.WorkEmailAddress, Contact.HomeEmailAddress
> >>
> >> Each metadata item needs to be unique so that you can get/set its value 
> >> individually as well as search it. Theres no way round this in any 
> >> metadata DB.
> > 
> > Not being able to handle multiplicative metadata would make some things
> > very awkward. For example what should happen with music that has
> > multiple artists? I think that supporting multiple values for a piece of
> > metadata, and being able to match any of them would be important for
> > both the indexing side, and the first-class object side.
> 
> its not a problem if we store multiple values as a commas separated list 
> (the values in question would have to be strings)
> 
> the fulltext index breaks up strings into individual words and indexes 
> those words so theres no loss of functionality there.
> 
> Substring searches are supported in our rdf query implementation so you 
> will be able to search inside them
> 
> 
> > 
> > What would be really cool is support for field groups, but that would
> > probably require a fairly large change. So you could do things like
> > correctly storing the release dates when a track is on multiple albums:
> > 
> > Title=Some Track
> > Artist=Artist
> > (Album=X, ReleaseDate=2000/1/1)
> > (Album=Y, ReleaseDate=2001/2/2)
> 
> that would be tricky unless the album was a separate object
> 
> > 
> > 
> > With the Contact example above, what happens if I work for two
> > companies, and email addresses for both? Can I say that one set of phone
> > number, postal address and email address ies related (i.e. one company)
> > and another set is related (the other company)?
> 
> if we support vCard spec then its more a question of does vCard support 
> that?
> 
> looking at evolution's contacts screen it does not look like its support 
> more than one work email (it has home, work and other)
> 
>