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On Wednesday 13 February 2002 10:40 am, Mark Baker wrote:
> > Which is perfectly fine... the question though is how do I refer
> > to a *specific* digtal resource reliably, such that I can always
> > retrieve a represenation that it is a copy of the original
> > resource? Using a URI, how can I reliably point to foo.gif?
>
> Use the URI provided in the Content-Location header of the response,
> if any.
>
> From RFC 2616, Sec 14.14;
>
> "A server SHOULD provide a Content-Location for the
> variant corresponding to the response entity; especially in the
> case where a resource has multiple entities associated with it, and
> those entities actually have separate locations by which they might
> be individually accessed, the server SHOULD provide a
> Content-Location for the particular variant which is returned."
>
> If a specific URI for the representation isn't provided, then your
> only choice is for you to identify it yourself by hanging that
> content off of your own web server.
I hope you see the point here though.... there is *no* reliable way to
send a URI to a specific resource representation as the web would
exist in a world of purely abstract URI's. To my mind, that is BAD
(Broken As Designed). Abstract URI's are a powerful thing, but they
shouldn't/cannot be the *only* thing.... (maybe that's why we used to
have URL, URI, URN?)
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