What determines if an iCal event on CalDAV calendar is editable?

We are using iCal3 to link to a CalDAV calendar store. This allows us to also access the calendar store from other things - such as web based calendar interface and other CalDAV aware calendars.
We've found that events created or edited in other applications / via the web are not always editable when viewed in iCal3. Rather than seeing the 'edit' and 'done' buttons on the Get Info screen, they just show 'Done'. The event remains editable in the other applications / via the web.
Presumably the event is missing some XML tag to say that it can be edited. Any idea what it is? Any idea what can be done to tell iCal to edit these events? Right now all it is doing is encouraging us to use the other applications for our Calendar access in preference to iCal...
Thanks in advance for any insights etc.

Surprise Surprise!
I realized after heavy testing, that a DTSTAMP: is not needed.
But there is apparently a problem with the DATE-TIME format: Perhaps for other readers, which are in such a desparate situation, as I am since two days now!!! here some explanations:
The reference about iCal format you find in RFC 5546
DTSTART; and DTEND; have a time string like follows:
yyyymmddThhmmss
In the middle the big letter "T". But you have to add the time zone: for me it is the following:
DTSTART;TZID=Europe/Berlin:20120608T062500
Now the big surprise: this time format with an hour over 12 ooops! I tested now once again like follows
DTEND;TZID=Europe/Berlin:20120608T212500
DTSTART;TZID=Europe/Berlin:20120608T202500
changing the hh (hours) with one hour difference up until here. 10 Minutes again, iCal was freezing with hours over 19. I swear!
Ok to answer my original question: What is the minimal format of an iCal event, which you may attach to an email:
BEGIN:VCALENDAR
BEGIN:VEVENT
DTEND;TZID=Europe/Berlin:20120608T212500
SUMMARY:Name
DTSTART;TZID=Europe/Berlin:20120608T202500
LOCATION:MUC
SEQUENCE:0
BEGIN:VALARM
TRIGGER:-PT1H
DESCRIPTION:Event reminder
ACTION:DISPLAY
END:VALARM
END:VEVENT
END:VCALENDAR
But be aware, that this is buggy. Be carefull and have a nice evening
marek

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What is the minimal Format of an iCal event to attach to an email?

Hello all!
I just finished a large order page for a taxi friend. I would like to send the order with an iCal event attached to an email. He should only click on this new file, to enter this pickup order to his iCal ...
I am struggling with the format. In my CGI script I have the following format, where the $variables are replaced with the convinient strings:
BEGIN:VCALENDAR
BEGIN:VEVENT
DTEND;TZID=Europe/Berlin:$ical_data_end
SUMMARY:$ical_summary
DTSTART;TZID=Europe/Berlin:$ical_data_start
DTSTAMP:$ical_dtstamp
LOCATION:$ical_location
SEQUENCE:0
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BEGIN:VALARM
TRIGGER:-PT1H
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END:VCALENDAR
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Surprise Surprise!
I realized after heavy testing, that a DTSTAMP: is not needed.
But there is apparently a problem with the DATE-TIME format: Perhaps for other readers, which are in such a desparate situation, as I am since two days now!!! here some explanations:
The reference about iCal format you find in RFC 5546
DTSTART; and DTEND; have a time string like follows:
yyyymmddThhmmss
In the middle the big letter "T". But you have to add the time zone: for me it is the following:
DTSTART;TZID=Europe/Berlin:20120608T062500
Now the big surprise: this time format with an hour over 12 ooops! I tested now once again like follows
DTEND;TZID=Europe/Berlin:20120608T212500
DTSTART;TZID=Europe/Berlin:20120608T202500
changing the hh (hours) with one hour difference up until here. 10 Minutes again, iCal was freezing with hours over 19. I swear!
Ok to answer my original question: What is the minimal format of an iCal event, which you may attach to an email:
BEGIN:VCALENDAR
BEGIN:VEVENT
DTEND;TZID=Europe/Berlin:20120608T212500
SUMMARY:Name
DTSTART;TZID=Europe/Berlin:20120608T202500
LOCATION:MUC
SEQUENCE:0
BEGIN:VALARM
TRIGGER:-PT1H
DESCRIPTION:Event reminder
ACTION:DISPLAY
END:VALARM
END:VEVENT
END:VCALENDAR
But be aware, that this is buggy. Be carefull and have a nice evening
marek

What determines if an iCal event on CalDAV calendar is editable?

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