[Ietf-caldav] Dead properties on CalDAV events / folders

[Mike Douglass]

As it say's in the rfc

     x-name             = "X-" [vendorid "-"] 1*(ALPHA / DIGIT / "-")
     ; Reservered for experimental use. Not intended for use in
     ; released products.


As a server I won't know if an x property is supposed to be multi-valued 
for example. I would take the position that I shouldn't have to preserve 
any x-properties.

I think it would also be a problem to require that the server store 
arbitarry non-calendar - that would make it more diffficult to interface 
existing calendar systems with a  caldav front-end

Helge Hess wrote:

> Hi,
>
> I think it would be good if the CalDAV spec would be very specific on  
> whether or not a CalDAV server is required to support arbitary dead  
> properties for authenticated users.
> Some WebDAV implementations simply reject PROPPATCHes with a 403  
> Forbidden (usually because they do not support custom properties [501  
> would be more appropriate, but with a 403 the operation can be  
> rejected while still being "formally compliant" ...]).
>
>
> This is important to resolve because a client developer must know  
> whether he can rely on using dead properties to store non-iCal  
> associated state in the server (which seems natural) or whether he  
> must resort to use x- properties. And even for the latter it would be  
> good if CalDAV would explicitly specify whether the server is  
> required to preserve arbitary iCalendar x- attributes in the content.
>
> To give a real world example, a MAPI storage provider would need some  
> place to store additional MAPI properties not covered by plain  
> iCalendar (for example the color label in OL 2003).
> The same goes for folder information (eg MAPI associated contents of  
> a folder which are used to store the last selected view).
>
> Greets,
>   Helge


-- 

Mike Douglass                           douglm at rpi.edu
Senior Systems Programmer
Communication & Collaboration Technologies      518 276 6780(voice) 2809
(fax)
Rensselaer Polytechnic Institute 110 8th Street, Troy, NY 12180