Re: [Tracker] Handling arrays in XMP

[Jon Phillips <jon rejon org>]

On Mon, 2007-06-25 at 16:35 -0700, Jason Kivlighn wrote:
> As far as I can tell, Tracker only does a one to one mapping of keys to
> values.  For example, there can only be one value for DC:Title.
>
> For the dc:subject example, I'm talking about how to index this
> example.  I can only have one value mapped to DC:Subject in the
> database, so I'm wondering if I should just separate each array item
> with a comma and then store that as the DC:Subject value.

Jamie and others, what do you think?

Jon

> Jon Phillips wrote:
> > On Mon, 2007-06-25 at 10:53 -0700, Jason Kivlighn wrote:
> >   
> > > Hi all,
> > >
> > > I'm handling reading sidecar XMP, and wanted to know what people thought
> > > about handling arrays in XMP.  i.e.:
> > >
> > >   <dc:subject>
> > >     <rdf:Bag>
> > >       <rdf:li>keyword 1</rdf:li>
> > >       <rdf:li>another keyword</rdf:li>
> > >     </rdf:Bag>
> > >    </dc:subject>
> > >
> > > This would be added to the DC:Subject field.  Is it reasonable to
> > > represent the array as a comma-separated list of items, as in "keyword
> > > 1, another keyword".
> > >     
> >
> > Are you talking more about UI so that one could enter a CSV string and
> > then it would appear witht eh rdf bag example above?
> >
> >   
> > > Also, there's the case of multiple values, where each represents the
> > > value in a particular language.  i.e.:
> > >
> > >   <dc:title>
> > >     <rdf:Alt>
> > >       <rdf:li xml:lang="x-default">Extensible Metadata Platform</rdf:li>
> > >       <rdf:li xml:lang="it-IT">Piattaforma Estendibile di Metadata</rdf:li>
> > >     </rdf:Alt>
> > >    </dc:title>
> > >
> > > Should I try reading the current locale and add based on that?  If the
> > > language isn't matched, it would use the value of "x-default".  Or maybe
> > > both x-default and the  locale match could be added, comma-separated?
> > >
> > > Cheers,
> > >     
> >
> > I think best approach would be to not lose ANY data from a sidecar file
> > in case one changed languages, etc.
> >
> > Jon
> >
> >   
-- 
Jon Phillips

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