Jacob,
Both the CONNEG working group in the IETF and the
CCPP working group in the W3C have looked at this. The
first step in this process is moving the decision about what
version to send away from dependencies based on User-Agent to
profiles (based on RDF in the CCPP case and prolog-like syntax
in the CONNEG case). Those profiles can be referenced or
included in the request/response stream. In some cases, the
proxy capabilities may even be associated with the request
so that an origin server can make a decision which includes
the transcoding capabilities of the proxy.
For the W3C work, please see http://www.w3.org/Mobile/CCPP/ ;
for the IETF work, please see RFCs 2533, 2912, 2913, and 2938.
regards,
Ted Hardie
> I am not a regular participant of wrec. But I have a question which
> maybe you have already solved. I tried to look into your archives,
> but could not find it. The question is that more and more web sites
> will chech which browser type the user has, and deliver different
> versions of a web page depending on the browser type. How can
> proxies handle this, so that you deliver a cached version only if it
> suits the browser capabilities of the user? -- Jacob Palme
> <jpalme@dsv.su.se> (Stockholm University and KTH) for more info see
> URL: http://www.dsv.su.se/jpalme/
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