[ietf-caldav] X- props in organizer's copy

[Arnaud Quillaud <[e-mail]>]

Hello,

CalDAV clients often use X- props to persist proprietary information 
(e.g. "X-MYCLIENT-EVENT-COLOR:red", or 
"X-MYCLIENT-MEETING-CHAT-URL:xyz:abc").
Using the new scheduling model, it is now the server's responsibility to 
propagate or not propagate those X- props to attendees: propagating an 
event color property would not be appropriate while propagating a 
meeting chat url would be. In the meantime, it is impossible for a 
server to be aware of all X- props (existing and yet to come) and take 
the apppropriate action.

Should we define a boolean parameter indicating whether the organizer's 
client wishes to propagate a particular property (or component) to the 
attendee ? The default would be true.

Example:
X-MYCLIENT-EVENT-COLOR;SCHEDULE-PROPAGATE=FALSE:red
X-MYCLIENT-MEETING-CHAT-URL;SCHEDULE-PROPAGATE=TRUE:xyz:abc

Actually, the same could be said about regular properties: An organizer 
may want to add an attachment to his copy of a meeting but may not want 
to send it to the attendees.

Arnaud Q