Re: [calsify] JSCalendar: fractional seconds

["Robert Stepanek" <[e-mail]>]

Hi Cyrus,

thanks for you input and greetings from Bedford from the CalConnect crowd :)

On Thu, Jun 6, 2019, at 4:37 PM, Cyrus Daboo wrote:
>  FRACSEC MUST NOT be used in date-time calculations or comparisons in 
> iCalendar

Yes, that's better.

> > Description: This parameter MAY be specified on properties of type
> > DATE-TIME or DURATION. The integral part of the float value MUST
> 
> Can this also be used with value type TIME?

We currently don't need it defined for TIME for JSCalendar conversion. But I guess it would do no harm. I don't want to define this for PERIOD, we don't have a use case for it and. I'll take note of VFREEBUSY, but it will go into its own extension RFC.

> In components other than VEVENT, a DTSTART is not required to be present 
> when RECURRENCE-ID is present (e.g. VTODO with just a DUE). So this should 
> probably be re-worded, something like:
> 
>  its value MUST match the FRACSEC parameter value on the DATE-TIME
>  property that defines the reference point for the recurring instances.

Great, thanks.

> Should FRACSEC be allowed on an RRULE containing a DATE-TIME UNTIL value? 
> Looks like JSCalendar allows fraction seconds on UNTIL.

It'd be great to add e.g. UNTIL-FRACSEC to RRULE. But from experience client implementations tend to just ignore unknown parameters, whereas they fail for unknown RRULE fields. I'm not sure how we will handle that.

> Is there any need to use fraction seconds in an RRULE BY... rule? (I hope 
> not).

None that I know of.

Cheers,
Robert