[Ietf-caldav] Dead properties on CalDAV events / folders
helge.hess at opengroupware.org
Mon Dec 19 05:00:50 PST 2005
On 19. Dez 2005, at 06:34 Uhr, douglm at rpi.edu wrote:
> We should be able to state quite explicitly the requirements for
There was plenty of discussion on that now and honestly I think
further discussion will lead to nowhere, everyone has stated his
So far everyone seems to have a different opinion on that and I have
the impression that the topic will just get "dropped" as
unresolvable? Or is there some way to vote on the issue in a useful way?
In response to the valid issues raised by Julian (and others) I think
I've changed my opinion to:
- CalDAV servers are required to store verbatim copies
- PROPPATCH is a SHOULD just like in WebDAV
Why? Because HTTP/WebDAV is designed with that assumption in mind and
it keeps the CalDAV protocol clean.
If a server doesn't comply with all strict requirements of CalDAV it
is very likely to work with real world clients nevertheless. But to
be fully-CalDAV compliant, it would need to work exactly as described
in the spec.
This is how it works in the real-world for WebDAV. Few do 100%
correct implementations but still interoperability is quite good.
> at least we can still see the events and invite people to our
> meetings and surely that's the main point.
For inviting people to our meetings we can already use iMIP. IMHO the
main point of CalDAV is to provide a client/server calendar _storage_
protocol. And if most/all clients will need an _additional_ storage
to save their "own" stuff, this would be extremely annoying.
Eg if our Outlook storage provider can't store additional Outlook
information in X- fields there is no other way but to require the
user to enter a CalDAV URL _and_ another URL where additional data
will get stored. Then it will also need to keep those in-sync. Major
PS: this "abuse" subthread is IMHO indeed paranoid. M$ will modify/
call a mixup derivate CalDAV whenever they like, this isn't bound to
any specific feature in CalDAV. (Windows WebFolders is a prime
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