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Shadow Attributes

From: Anselm Baird-Smith <abaird@w3.org>
Date: Thu, 29 Aug 1996 22:12:34 +0500
Message-Id: <9608300212.AA22351@www18.w3.org>
To: "A. Richter" <richter@fokus.gmd.de>
Cc: www-jigsaw@w3.org
A. Richter writes:
 > 
 > Hi all,
 > 
 > I have been playing around with the Jigsaw server for the last days and 
 > I am really impressed about it. Nice work ;-)
 > 
 > I know that documentation is not intended to be up to date ;-) but I 
 > wondered about all these shadowed attributes. Why are they used for and 
 > what are their intentions? 

In brief, the yallow a filter to "shadow " their target resource
attribute. Imagine a filter tha gzip content on the fly. If the
original resource's content-encoding is void, after filtering it has
to be gzip. You can set  the shadow value for content-encoding to gzip
to handle this situation.

 > The only statement I found in the documentation about shadow attributes 
 > was on page http://www.w3c.org/pub/WWW/Jigsaw/User/Administration/resedi
 > t.html. But it was just a sentence referring to Jigsaw architectural 
 > overview :-(  (http://www.w3c.org/pub/WWW/Jigsaw/User/Introduction/archi
 > tecture.html). Unfortunately, this page contains other valuable 
 > information but no information about shadow attributes.
 > 
 > I would be very happy if someone points out some other location where I 
 > can find some information about shadow attributes and their use.

Hope this helps,

Anselm.
BTW: The w3c.jigsaw.filters.ProcessFilter was the one that should make
use of it, if I find a Java implementation that will run it (it was
intended for the upcomming proxy, to compress on slow lines between
the proxy and the client).
Received on Thursday, 29 August 1996 22:12:40 GMT

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