Shadow Attributes

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).