[caldeveloper-l] DTSTART that doesn't match RRULE pattern

[Hans-Joerg Happel]

Hi Neil,

just for clarification:

By stating that Apple Calendar allows to create such events, (a) the
latter refers to events, in which DTSTART is not part of the RRULE.

And by describing the Apple Calendar behavior in that case, you say (b)
that it will, in such cases, show DTSTART as an instance and also count it.

Did I get that correct?

Thanks and best,
Hans-Joerg

On 11.10.2018 02:54, Neil Jenkins wrote:
> On Thu, 11 Oct 2018, at 6:46 AM, Cyrus Daboo wrote:
>> The intent of that was to effectively deprecate the behavior of
>> DTSTART not 
>> matching the pattern (without making it outright illegal by using a
>> MUST), 
>> with the idea that a future update to 5545 would switch to MUST.
>
> That's lovely in theory, but in practice there are still many clients
> that allow you to create such events. Apple Calendar, to take one
> example. While we can (and do in the FastMail UI) enforce that events
> /we/ create have recurrence rules that match their DTSTART, we still
> have to handle events created in other clients, so for compatibility
> between different clients and calendar systems I think we should
> specify it rather than leave it undefined. The most sensible thing
> would be to choose the behaviour that's currently most prevalent and
> standardise on that.
>
> The FastMail UI currently matches the Apple Calendar behaviour (for
> compatibility with this): the DTSTART is always counted as the first
> occurrence, even if it doesn't match the rule.
>
> Neil.
>
>
> _______________________________________________
> caldeveloper-l mailing list
> caldeveloper-l at lists.calconnect.org
> http://lists.calconnect.org/listinfo.cgi/caldeveloper-l-calconnect.org

-- 
audriga GmbH
Durlacher Allee 47
76131 Karlsruhe, Germany
Tel: +49 (0) 721 17029 316
Fax: +49 (0) 721 17029 3179

www.twitter.com/audriga
www.audriga.com

Handelsregister: Amtsgericht Mannheim - HRB 713034
Sitz der Gesellschaft: Karlsruhe
Geschäftsführer: Dr. Frank Dengler, Hans-Jörg Happel
USt-ID: DE 279724142

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.calconnect.org/pipermail/caldeveloper-l-calconnect.org/attachments/20181011/e84a02fb/attachment.html>