Re: [PATCH 0/9] Multi-valued proposal (WIP)

[Iago Toral <itoral igalia com>]

On Wed, 23 Feb 2011 17:17:28 +0100, "Juan A." Suárez Romero 
<jasuarez igalia com> wrote:
> On Wed, 2011-02-23 at 15:54 +0000, Iago Toral wrote:
> > > But besides this, this relations defined by core are somewhat
> > fixed,
> > > in
> > > the same way core register the predefined keys: we can add in
> > > documentation which keys exists, and which keys are related with.
> > >
> > > Let me clarify why I added this approach: plugins can define their
> > > own
> > > keys on run-time and this keys can correlated with other keys.
> > >
> > > As example, Gravatar plugin introduces two new keys,
> > "artist-avatar"
> > > and
> > > "author-avatar", and this keys are correlated with "artist" and
> > > "author", respectively.
> > >
> > > So I need to have a flexible way to handle this situation.
> >
> >  To be honest, I find the fixed correlations important (like having
> >  multiple uris and wanting to match ach of them with their mimes for
> >  exmple), but for other cases like the one you mention here I don't
> > know
> >  if it is so important. My doubt is if this extra flexibility is
> > worth
> >  it.
>
> My concern is not if it's good or not, but if it's necessary or not.
>
>
> If we allow plugins defining their own keys, then we must have a way 
> of
> having other correlations.
>
> Else, let's drop out the possibility of creating new keys in sources.

As I explained on jabber, we could have specific API for third party 
developers to manage correlations manually in case they need / want to. 
It would not be as nice as this, but if that allowed us to have a more 
explicit API it could be worth the sacrifice, specially thinking that 
the use case for user defined keys with correlations is not something 
that I see happening often at all.

But anyway, maybe adding some extra utility APIs in GrlMedia* objects 
as a way to make some of the most important relations a bit more 
explicit is a good balance between both points of view.

Iago

Iago