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Re: no-transform

From: Ted Hardie <hardie@merlot.arc.nasa.gov>
Date: Thu, 6 Jun 1996 13:22:43 -0700 (PDT)
Message-Id: <199606062022.NAA08868@merlot.arc.nasa.gov>
To: jg@w3.org
Cc: hardie@nic.nasa.gov, fielding@liege.ICS.UCI.EDU, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com
X-Mailing-List: <http-wg@cuckoo.hpl.hp.com> archive/latest/836
Jim writes:
> Here is a third try, which I think is better than either my original or
> Ted's rewrite.
>  14.9.5 No-Transform Directive
>   Intermediate caches (proxies) have found it useful to convert the
>   media type of certain entity bodies.  A proxy might, for example,
>   convert between image formats in order to save cache space or
>   to reduce the amount of traffic on a slow link.  HTTP has to date
>   been silent on these transformations.  
>   Serious operational problems have already occured, however, when these 
>   transformations have been applied to entity bodies intended for certain 
>   kinds of applications.  For example, applications for  medical imaging, 
>   scientific data analysis and those using end-to-end authentication, 
>   all require that the original entity-body be reproduced exactly bit for bit.
>   Therefore, an intermediate cache MUST NOT change the
>   media type of an entity-body if the response includes the no-transform
>   directive.

Looks good to me.


			Ted Hardie
Received on Thursday, 6 June 1996 13:26:24 UTC

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