I've been trying to create an iCal that shows the time as Tentative. It
looks like the TRANSP property options are only able to specify Free or
Busy. The following is a sample iCal that I created but which shows up
as "Busy".
BEGIN:VCALENDAR
PRODID:-//Microsoft Corporation//Outlook 9.0 MIMEDIR//EN
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER:MAILTO:foo@bar.com
DTSTART:20060225T110500Z
DTEND:20060225T130300Z
LOCATION:ATL - ORD
TRANSP:OPAQUE
SEQUENCE:0
UID:1140865500000
DTSTAMP:20051025T022939Z
CATEGORIES:Rearden - AIR
DESCRIPTION:Description
SUMMARY:Summary
PRIORITY:5
CLASS:PUBLIC
END:VEVENT
END:VCALENDAR
Your analysis apparently is correct. According to the iCal specification (http://www.ietf.org/rfc/rfc2445.txt), TRANSP can be only OPAQUE (busy) or TRANSPARENT (free). There is no intermediate value for tentative.

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> I've been trying to create an iCal that shows the time as Tentative. It
> looks like the TRANSP property options are only able to specify Free or
[quoted text clipped - 21 lines]
> END:VEVENT
> END:VCALENDAR
CT - 27 Oct 2005 19:36 GMT
Thanks for the reply. Since I can't use the TRANSP property. Is there
any other property that can be used to specify the time as "Tentative"?
The variations I tried are as below. I also tried saving a event that
had the show time as Tentative as a iCalendar format on my desktop.
When I opened the event from my desktop, it showed the time as Busy, so
there doesn't seem to be a way to specify a Tentative time.
variations attempted:
-----------------------------
STATUS:TENTATIVE
TRANSP:OPAQUE
...
STATUS:TENTATIVE
TRANSP:TRANSPARENT
...
END:VEVENT
BEGIN:VFREEBUSY
ATTENDEE;PARTSTAT=TENTATIVE:MAILTO:foo@bar.com
FREEBUSY;FBTYPE=BUSY-TENTATIVE:20051012T140000Z/20051012T160100Z
END:VFREEBUSY
END:VCALENDAR
Sue Mosher [MVP-Outlook] - 27 Oct 2005 21:56 GMT
AFAIK, the iCalendar specification doesn't have anything that does tentative, but you have the URL now, so you can dig into it more deeply.

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Thanks for the reply. Since I can't use the TRANSP property. Is there
> any other property that can be used to specify the time as "Tentative"?
[quoted text clipped - 20 lines]
> END:VFREEBUSY
> END:VCALENDAR