KEP 3: Introduction of 'subevent' sub-tag for 'exclusion' from 'recurrence'

Georg C. F. Greve greve at
Wed Nov 17 18:24:34 CET 2010

On Wednesday 17 November 2010 17.26:31 Sérgio Martins wrote:
> This is good, we can finally change one single occurrence without having
> to  send two iTip messages to attendees ( one adding a new incidence, and
> another changing the exception list of the original incidence ).
> One invitation e-mail will be enough.

Yes, this is one of the reasons why this was proposed.

> I would suggest to use the "recurrence-id" terminology to identify such 
> exceptions.
> "recurrence-id" is the name of this feature in the ical and iTip
> standards,  and it's equal to the occurrence's dtstart.

That is an interesting idea.

I wonder whether we need to make this its own tag, or whether we should simply 
define that the 'exclusion' date is the recurrence-id, because that way we 
retain backwards compatibility and get the benefits of the concept.

Best regards,

Georg C. F. Greve
Chief Executive Officer

Kolab Systems AG
Zürich, Switzerland

e: greve at
t: +41 78 904 43 33

pgp: 86574ACA Georg C. F. Greve
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