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RE: ETags

From: Kevin Wiggen <wiggs@wiggenout.com>
Date: Thu, 17 Feb 2000 12:42:33 -0800
To: Jim Whitehead <ejw@ics.uci.edu>, WebDAV WG <w3c-dist-auth@w3.org>
Message-id: <NDBBKKABAANNAJHAOGMECEFHCCAA.wiggs@wiggenout.com>

I could probably make up just as compelling reasons why the ETag and
Last-Modified-Date SHOULD change during a update of a dead property etc.


I agree that it seems that no other server can (or is) supporting this.  I
can pull this functionality out of Xythos.

I just read Greg's email, and I don't like putting the MAY in the spec.  A
client will never know what the server is doing.  I think we just need to
pick a position and put it in 2518.

I am fine with changing properties does not modify the ETag or
Last-Modified-Date.  But I think we should be consistent.


-----Original Message-----
From: w3c-dist-auth-request@w3.org
[mailto:w3c-dist-auth-request@w3.org]On Behalf Of Jim Whitehead
Sent: Thursday, February 17, 2000 12:03 PM
Subject: FW: [Moderator Action] RE: ETags

Accidentally caught by the spam filter.

- Jim

-----Original Message-----
From: Clemm, Geoff [mailto:gclemm@rational.com]
Sent: Wednesday, February 16, 2000 7:56 PM
To: w3c-dist-auth@w3.org
Subject: [Moderator Action] RE: ETags

A good reason to not change the etag or mod-date when a property changes
is that a property is often information about the resource, as opposed to
"being" the resource.  If I mark a resource as being "tested", I don't want
it to appear that the resource has changed (thus making it look like I need
to test it again).
A less compelling reason (but still a consideration) is to achieve
between dead and live properties.  You certainly don't want a change to the
"last access time" of a resource to modify the etag or "modification time"
that resource.
Add to this the fact that current implementations appear to not modify the
etag or
modification time when a dead property is modified, and I think we have a
case that neither the etag value nor the modification time should
be changed when a dead property is updated.


> -----Original Message-----
> From: Kevin Wiggen [mailto:wiggs@xythos.com]
> Sent: Wednesday, February 16, 2000 4:12 AM
> To: w3c-dist-auth@w3.org
> Subject: ETags
> I searched the spec and could not find any special details on handling
> ETags.
> Should an ETag value be updated when a dead property is
> changed?  On the
> same note, do most servers update the last-modified-date when a dead
> property is changed?  Does Webdav want to take a stand one
> way or another?
> Curious,
> Kevin
Received on Thursday, 17 February 2000 15:48:51 UTC

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