Developer discussion for Creative Commons technology and tools

[Jon Phillips <jon AT rejon.org>]

On Sun, 2007-07-08 at 17:13 -0400, Hubert Figuiere wrote:
> Nathan R. Yergler wrote:
> > On 7/6/07, Hubert Figuiere <hub AT figuiere.net> wrote:
> >> Jason Kivlighn wrote:
> >>>> Why .filename.xmp ? It should be basename.xmp (no dot 
> >>>> prepended) I don't know where this convention comes from but 
> >>>> definitely not the one from the current (non-free) 
> >>>> implementations. I'd rather wish we don't reinvent the wheel.
> >>> Just to be clear, this means that for, say, file.jpg, the xmp 
> >>> sidecar would be at file.xmp (and not file.jpg.xmp)?
> >> Yes. That's what it is.
> > 
> > Is this a standard from the non-free implementations?
> 
> That's what they do.
> This is also what is said page 36 of the XMP spec. And I quote:
> 
> "For applications that need to find external XMP files, look in the
> same directory for a file with the same name as the main document but
> with an .xmp extension. (This is called a sidecar XMP file.)"
> 
> 
> 
> > It seems like this can only lead to more likely collisions in sidecar
> >  files (ie, what if I have "july4.jpg" and "july4.mpg"  in the same 
> > folder?).
> 
> Good point. The other thing is that said implementations don't use
> sidecar for files that they know how to rewrite, as recomended in the
> spec, also page 36. That means in your example none file will use a
> sidecar. On the other hand, camera RAW do. And maybe other types.
> 
> I'm not sure how to solve that problem, but I know that the namespace
> "http://ns.adobe.com/photoshop/1.0/";  has a property SidecarForExtension
> that designate the extension of the file the XMP sidecar refers to
> (Adobe Bridge CS3 does set it). This property is not documented in the
> specification.
> 
> 
> Hub

What we need to do is start a list of these issues and bring them up
with xmp product manager, which I can do. I am working to get an
advisory group and/or w3c hookup for xmp to happen. Anyone want in?

Jon

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Jon Phillips

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