Re: .ics export violates RFC2445

[Adam Spiers <orgmode@adamspiers.org>]

Carsten Dominik (carsten.dominik@gmail.com) wrote:
> On  7Nov2007, at 9:56 PM, Adam Spiers wrote:
> >I use org-export-icalendar-combine-agenda-files to export my
> >appointments to an .ics file which I point korganizer at.
> >
> >I noticed ages ago that if I have an appointment with a comma in,  
> >e.g.:
> >
> >** <2007-12-07 Fri 20:00> foo, bar
> >
> >korganizer always shows it as "bar" rather than "foo, bar".  But I
> >never got round to investigating whether it was a bug with the export
> >or korganizer or something else ... until now :-)  I just took a quick
> >look at the iCalendar spec, which is RFC2445, and discovered that the
> >SUMMARY field is defined as follows
> >
> >   summary    = "SUMMARY" summparam ":" text CRLF
> >
> >    -- from http://tools.ietf.org/html/rfc2445#section-4.8.1.12
> >
> >And the definition of 'text' in this context explicitly states that
> >several characters, including commas, need to be escaped with a
> >backslash:
> >
> >   http://tools.ietf.org/html/rfc2445#section-4.3.11
> >
> >Sure enough, when I edited the .ics file and manually escaped the
> >comma, korganizer displayed the summary correctly.
> 
> fixed, thanks
> 
> - Carsten

This appears to have regressed in some recent version ...

Also, it would be great if a UID field could be generated for each
event, perhaps by checksumming the contents of the event in some way.
The RFC says:

   Conformance: The property MUST be specified in the "VEVENT",
   "VTODO", "VJOURNAL" or "VFREEBUSY" calendar components.

     -- http://tools.ietf.org/html/rfc2445#section-4.8.4.7

The checksum would ensure that the UID field only changes when the
event details check, which would be a first step towards helping
synchronisation systems.  I'm vaguely suspicious that the lack of UIDs
currently confuses Google Calendar too.

Thanks!