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From: "David C. Thewlis" <Dave.Thewlis@calconnect.org>
To: "IETF CALSCH" <ietf-calendar@imc.org>
Subject: Latest on Interop testing event at UC Berkeley
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The first Interop testing event of The Calendaring and Scheduling
Consortium is scheduled for Thurday and Friday 29-30 June at the University
of California at Berkeley (South Hall, Room 110).  Information about the
Interop is posted on the Consortium website at http://www.calconnect.org
including planning and logistics, registration, goals and technical
information.  Note that the launch event which we had intended to have the
previous afternoon will happen later this year, so nothing is scheduled for
Wednesday, making travel arrangements somewhat easier.

At this point we understand that IBM (Lotus) and another major vendor of
Calendaring and Scheduling products will be participating, and we expect
other participants.  If your organization is interested in participation
I'd encourage you to register soon as we would like an accurate count for
planning purposes fairly soon (and certainly by mid-July!)  If you are
considering but haven't decided as yet, I would appreciate a call or an
e-mail giving us a heads-up that you might be coming.

Note also that if you are thinking of joining the Consortium, if you do so
prior to the Interop (which will be the first public event of the
Consortium) you will become a Foundig Member (again, more on the website).

Feel free to contact me if you've got any questions.

Best Regards,

Dave Thewlis, Executive Director 
The Calendaring and Scheduling Consortium
1550 Dena Drive
McKinleyville CA 95519-4146
+1 707 840 9391 (voice)
+1 415 946 3454 (fax)
Dave.Thewlis@calconnect.org
www.calconnect.org





From owner-ietf-calendar@mail.imc.org  Thu Jul  1 13:57:33 2004
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From: "David C. Thewlis" <Dave.Thewlis@calconnect.org>
To: "IETF CALSCH" <ietf-calendar@imc.org>
Subject: Correct dates (29-30 July):  Re: Latest on Interop testing
  event at UC Berkeley
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Sorry, all.  I should have typed "29-30 JULY" and not June in my previous
note.

Guess this proves my personal calendaring isn't up to speed.

Dave Thewlis



From owner-ietf-calendar@mail.imc.org  Mon Jul 12 18:05:51 2004
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On Wed, 23 Jun 2004, RL 'Bob' Morgan wrote:

> > CALSCH is not on the draft agenda. Are we meeting?
>
> Yes, I'll be putting the request in shortly.

Since folks have been asking, in order to make travel plans ...

I did put in the request, but unfortunately there has been no new agenda
for IETF 60 issued since June 25.  I requested one of the one-hour slots
on Tuesday afternoon, so I assume that is what we will get.  I expect a
new agenda will be out shortly, or at least I hope so ...

 - RL "Bob"



From owner-ietf-calendar@mail.imc.org  Tue Jul 13 14:59:52 2004
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From: "David C. Thewlis" <Dave.Thewlis@calconnect.org>
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IBM and Oracle have both confirmed that they will participate in the
Interop at UC Berkeley on 29-30 July.  It's now just over two weeks until
the event, so if you are considering participating and haven't registered
yet, please do so as soon as possible.  More information is available at
http://www.calconnect.org; if you have any questions please e-mail
<Dave.Thewlis@calconnect.org> or give me a call on 707-840-9391.

Best Regards,

Dave Thewlis, Executive Director 
The Calendaring and Scheduling Consortium
1550 Dena Drive
McKinleyville CA 95519-4146
+1 707 840 9391 (voice)
+1 415 946 3454 (fax)
Dave.Thewlis@calconnect.org
www.calconnect.org





From owner-ietf-calendar@mail.imc.org  Mon Jul 19 08:49:50 2004
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HI all,

I have an implementation kind of question regarding the LAST-MODIFIED
property. I am curious of thoughts for this property whether it
is usefull to maintain in CAP clients (or intermediate-servers that
act as clients).


In our implementation of a CAP server we have added at the server side
the LAST-MODIFIED property. The approach is; adding or updating this 
property at the moment the component is inserted or updated in the
calendar store. My problem is that the CAP client invoking the
respective  action in the server will never know the value of the
property unless the client is does invoke a SEARCH command for the
specific UID/component.
The CAP client can do a reasonable guess of the time only when the 
system clock of the server and client are in sync. Not knowing the value
of the LAST-MODIFIED makes it difficult for a CAP client that would only 
like to retrieve updates made since the last synchronization (it does 
not really know the LAST-MODIFIED value) and having been off-line
(think along the lines of IMAP usage).

Therefore, I was thinking that it could be useful to have a 
LAST-MODIFIED property in the VREPLY also. If I look at examples in
page 103/104 the UID is included.
Maybe there are other apporaches I have missed so far, but always
invoking a SEARCH command for a specific time and then in the client
chekcing whether there was an update is also not attractive. In 
perticular in clients with limited resources.


Any ideas,

Harrie



From owner-ietf-calendar@mail.imc.org  Mon Jul 19 21:49:31 2004
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First - I do not believe the intent of CAP is for true "synchronization" in 
the PDA/IntelliSync/SyncML sense. That would be more in the vein of the 
SyncML projects I believe.

Secondly, see 4.8.7.2 (DTSTAMP) in RFC2445 - I belive that this DTSTAMP, in 
conjunction perhaps with UID and/or SEQ, could be used to determine the 
update time of things on the other end.. It would be up to the client to 
maintain DTSTAMP in any local database containing iCalendar 
objects;  remember, however that storing calendar objects makes you a CS 
(Calendar Store) in addition to a CUA  and you might want/need to act 
accordingly.

Tim Hare
Interested Bystander, Non-Inc.



At 08:38 AM 7/19/04, you wrote:

>HI all,
>
>I have an implementation kind of question regarding the LAST-MODIFIED
>property. I am curious of thoughts for this property whether it
>is usefull to maintain in CAP clients (or intermediate-servers that
>act as clients).
>
>
>In our implementation of a CAP server we have added at the server side
>the LAST-MODIFIED property. The approach is; adding or updating this 
>property at the moment the component is inserted or updated in the
>calendar store. My problem is that the CAP client invoking the
>respective  action in the server will never know the value of the
>property unless the client is does invoke a SEARCH command for the
>specific UID/component.
>The CAP client can do a reasonable guess of the time only when the system 
>clock of the server and client are in sync. Not knowing the value
>of the LAST-MODIFIED makes it difficult for a CAP client that would only 
>like to retrieve updates made since the last synchronization (it does not 
>really know the LAST-MODIFIED value) and having been off-line
>(think along the lines of IMAP usage).
>
>Therefore, I was thinking that it could be useful to have a LAST-MODIFIED 
>property in the VREPLY also. If I look at examples in
>page 103/104 the UID is included.
>Maybe there are other apporaches I have missed so far, but always
>invoking a SEARCH command for a specific time and then in the client
>chekcing whether there was an update is also not attractive. In perticular 
>in clients with limited resources.
>
>
>Any ideas,
>
>Harrie

Tim Hare
Interested Bystander, Non-Inc. 




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Harrie Hazewinkel wrote:

>
> HI all,
>
> I have an implementation kind of question regarding the LAST-MODIFIED
> property. I am curious of thoughts for this property whether it
> is useful to maintain in CAP clients (or intermediate-servers that
> act as clients).

Yes, LAST-MODIFIED was part of the synchronization discussion that took
part in the requirements for CAP.

What ever CUA is going to sync with the CS will need that property in order
to tell if which possibly modified object was the last edit of that object.

SEQUENCE and DTSTAMP tell you the last that was sent by the ORGANIZER.
However those will not tell you which has the correct copy of any added 
local
attributes (VALARM components as an example).

If the CS does not change anything as seen by the CUA, then LAST-MODIFIED is
not relevant.  If the UID, SEQUENCE, and DTSTAMP are the same
in the CUA and CS, yet the LAST-MODIFIED in the CS is newer, then it means
that another CUA updated the object (such as adding local vlarrms, or 
removing them, or ...)
and the copy in the CS should be used as the latest copy for 
synchronization.

http://www.calsch.org/ietf/archives/draft-ietf-calsch-capreq-04.txt

-- 

Doug Royer                     |   http://INET-Consulting.com
-------------------------------|-----------------------------
Doug@Royer.com                 | Office: (208)520-4044
http://Royer.com/People/Doug   | Fax:    (866)594-8574
                               | Cell:   (208)520-4044

              We Do Standards - You Need Standards



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From: "RL 'Bob' Morgan" <rlmorgan@washington.edu>
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Obviously the calsch WG has needed an updated charter for some time.  The
chairs proposed a revision back in February (25 Feb 2004), about which
there was not much discussion.

The one substantive uncertain item on that proposed charter was the
inclusion of a work item to revise RFCs 2445, 2446, and 2447 (iCal, iTIP,
iMIP).  No one has formally stepped up to do this, though the chairs have
heard that some people may be interested.  In any case, at this point we
suggest that the best course is to complete CAP under the banner of this
WG, and to have the RFC 2445-7 revisions, if any, happen either as
individual work or in a new WG chartered for that purpose.  So, the
proposed charter below is as small as it can be, including just the item
of completing CAP.  This will be on the agenda for discussion at our
meeting in San Diego.

 - RL "Bob"

---

Calendaring and Scheduling (calsch)

Last Modified: 2004-07-30
Chair(s):
  Pat Egen <pregen@egenconsulting.com>
  RL Bob Morgan <rlmorgan@washington.edu>
Applications Area Director(s):
  Ted Hardie <hardie@qualcomm.com>
  Scott Hollenbeck <sah@428cobrajet.net>
Applications Area Advisor:
  Scott Hollenbeck <sah@428cobrajet.net>
Mailing Lists:
  General Discussion: ietf-calendar@imc.org
  To Subscribe: ietf-calendar-request@imc.org
  In Body: SUBSCRIBE/UNSUBSCRIBE
  Archive: http://www.imc.org/ietf-calendar/mail-archive/

Description of Working Group:

The calsch WG develops standards to enable heterogeneous calendaring and
scheduling products and systems to interoperate.  Completed
standards-track work includes a specification for calendar objects and an
associated MIME type (RFC 2445, iCalendar), a transport-independent
protocol for exchanging and operating on calendar objects (RFC 2446,
iTIP), a message-based transport for iTIP (RFC 2447, iMIP), and definition
and discovery of calendar URIs (RFC 2739).  An informational document
(RFC 3283) provides an overview of the calendaring standards.

An additional standard protocol in the suite provides access to and
management of calendar objects in a real-time client-server fashion; this
is the "Calendar Access Protocol" (CAP).  Submission of CAP as a Proposed
Standard is the remaining work item of the WG.

Goals and Milestones:

Sep 04	  	Submit Calendar Access Protocol document to IESG
                for consideration as a Proposed Standard.



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From: "RL 'Bob' Morgan" <rlmorgan@washington.edu>
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Subject: proposed agenda for IETF calsch WG, Tuesday 2004-08-03 1415-1515
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Here is a proposed agenda for our meeting this coming Tuesday.
Unfortunately this wasn't done in time to get on the final IETF agenda.
Comments/revisions welcome.

 - RL "Bob"

---

Calendaring/Scheduling (calsch) WG

Tuesday, August 3 1415-1515
=============================

Chairs:
        RL "Bob" Morgan <rlmorgan@washington.edu>
        Pat Egen <pregen@egenconsulting.com>

Agenda:

0) Preliminaries (blue sheets, scribes, agenda bashing) - 5 min
1) WG status, proposed charter revision - 15 min
2) CAP -- draft-ietf-calsch-cap-12.txt - 20 min
   Discuss any issues remaining that need to be addressed before WG last
   call on this document.
3) report from Calconnect interop workship - 10 min
4) other outstanding issues - remaining time



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Cc: IETF calsch WG <ietf-calendar@imc.org>, Ted Hardie <hardie@qualcomm.com>,
        Scott Hollenbeck <sah@428cobrajet.net>
From: Nathaniel Borenstein <nsb@guppylake.com>
Subject: Re: proposed revised charter for IETF calsch WG
Date: Fri, 30 Jul 2004 15:23:27 -0400
To: "RL 'Bob' Morgan" <rlmorgan@washington.edu>
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I am opposed to rechartering the calsch group.  My preference would be 
to shut down the group entirely, and then start a new WG that is 
narrowly focused on revisions to RFCs 2445-7.  I  am particularly 
skeptical that work on CAP or any similar protocol based on those RFC's 
should be done in the same group that is in the middle of revising 
them.  I think progress will be much faster if we divide and conquer, 
and that the (substantial) revisions that are necessary in the base 
RFC's justifies a new group of its own.  -- Nathaniel

On Jul 30, 2004, at 2:29 PM, RL 'Bob' Morgan wrote:

>
>
> Obviously the calsch WG has needed an updated charter for some time.  
> The
> chairs proposed a revision back in February (25 Feb 2004), about which
> there was not much discussion.
>
> The one substantive uncertain item on that proposed charter was the
> inclusion of a work item to revise RFCs 2445, 2446, and 2447 (iCal, 
> iTIP,
> iMIP).  No one has formally stepped up to do this, though the chairs 
> have
> heard that some people may be interested.  In any case, at this point 
> we
> suggest that the best course is to complete CAP under the banner of 
> this
> WG, and to have the RFC 2445-7 revisions, if any, happen either as
> individual work or in a new WG chartered for that purpose.  So, the
> proposed charter below is as small as it can be, including just the 
> item
> of completing CAP.  This will be on the agenda for discussion at our
> meeting in San Diego.
>
>  - RL "Bob"
>
> ---
>
> Calendaring and Scheduling (calsch)
>
> Last Modified: 2004-07-30
> Chair(s):
>   Pat Egen <pregen@egenconsulting.com>
>   RL Bob Morgan <rlmorgan@washington.edu>
> Applications Area Director(s):
>   Ted Hardie <hardie@qualcomm.com>
>   Scott Hollenbeck <sah@428cobrajet.net>
> Applications Area Advisor:
>   Scott Hollenbeck <sah@428cobrajet.net>
> Mailing Lists:
>   General Discussion: ietf-calendar@imc.org
>   To Subscribe: ietf-calendar-request@imc.org
>   In Body: SUBSCRIBE/UNSUBSCRIBE
>   Archive: http://www.imc.org/ietf-calendar/mail-archive/
>
> Description of Working Group:
>
> The calsch WG develops standards to enable heterogeneous calendaring 
> and
> scheduling products and systems to interoperate.  Completed
> standards-track work includes a specification for calendar objects and 
> an
> associated MIME type (RFC 2445, iCalendar), a transport-independent
> protocol for exchanging and operating on calendar objects (RFC 2446,
> iTIP), a message-based transport for iTIP (RFC 2447, iMIP), and 
> definition
> and discovery of calendar URIs (RFC 2739).  An informational document
> (RFC 3283) provides an overview of the calendaring standards.
>
> An additional standard protocol in the suite provides access to and
> management of calendar objects in a real-time client-server fashion; 
> this
> is the "Calendar Access Protocol" (CAP).  Submission of CAP as a 
> Proposed
> Standard is the remaining work item of the WG.
>
> Goals and Milestones:
>
> Sep 04	  	Submit Calendar Access Protocol document to IESG
>                 for consideration as a Proposed Standard.
>
>
>



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> In any case, at this point we suggest that the best course is to
> complete CAP under the banner of this WG, and to have the RFC 2445-7
> revisions, if any, happen either as individual work or in a new WG
> chartered for that purpose.

Since someone asked, it's certainly my expectation that this list would
remain available indefinitely for discussions of all the calsch RFCs and
related calendaring stuff, including individual work, if any, on RFC
revisions.  So no need for new lists, at least not until a new WG is
chartered.

 - RL "Bob"



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Subject: Re: proposed revised charter for IETF calsch WG
From: Harrie Hazewinkel <harrie@inet.it>
To: Nathaniel Borenstein <nsb@guppylake.com>
Cc: harrie@inet.it, "RL 'Bob' Morgan" <rlmorgan@washington.edu>,
        IETF calsch WG <ietf-calendar@imc.org>,
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On Fri, 2004-07-30 at 21:23, Nathaniel Borenstein wrote:
> I am opposed to rechartering the calsch group.  My preference would be 
> to shut down the group entirely, and then start a new WG that is 
> narrowly focused on revisions to RFCs 2445-7.  I  am particularly 
> skeptical that work on CAP or any similar protocol based on those RFC's 
> should be done in the same group that is in the middle of revising 
> them.  I think progress will be much faster if we divide and conquer, 
> and that the (substantial) revisions that are necessary in the base 
> RFC's justifies a new group of its own.  -- Nathaniel

I would support this. It has been with other WGs a problem that
taking on new(extra) work gave the impression the orignal work 
was not done. Companies can use it as an excuse for not
implementing it and does not help progress.

If the CAP RFC is published and the WG is closed the signal to
implementors is clear.


Harrie

> 
> On Jul 30, 2004, at 2:29 PM, RL 'Bob' Morgan wrote:
> 
> >
> >
> > Obviously the calsch WG has needed an updated charter for some time.  
> > The
> > chairs proposed a revision back in February (25 Feb 2004), about which
> > there was not much discussion.
> >
> > The one substantive uncertain item on that proposed charter was the
> > inclusion of a work item to revise RFCs 2445, 2446, and 2447 (iCal, 
> > iTIP,
> > iMIP).  No one has formally stepped up to do this, though the chairs 
> > have
> > heard that some people may be interested.  In any case, at this point 
> > we
> > suggest that the best course is to complete CAP under the banner of 
> > this
> > WG, and to have the RFC 2445-7 revisions, if any, happen either as
> > individual work or in a new WG chartered for that purpose.  So, the
> > proposed charter below is as small as it can be, including just the 
> > item
> > of completing CAP.  This will be on the agenda for discussion at our
> > meeting in San Diego.
> >
> >  - RL "Bob"
> >
> > ---
> >
> > Calendaring and Scheduling (calsch)
> >
> > Last Modified: 2004-07-30
> > Chair(s):
> >   Pat Egen <pregen@egenconsulting.com>
> >   RL Bob Morgan <rlmorgan@washington.edu>
> > Applications Area Director(s):
> >   Ted Hardie <hardie@qualcomm.com>
> >   Scott Hollenbeck <sah@428cobrajet.net>
> > Applications Area Advisor:
> >   Scott Hollenbeck <sah@428cobrajet.net>
> > Mailing Lists:
> >   General Discussion: ietf-calendar@imc.org
> >   To Subscribe: ietf-calendar-request@imc.org
> >   In Body: SUBSCRIBE/UNSUBSCRIBE
> >   Archive: http://www.imc.org/ietf-calendar/mail-archive/
> >
> > Description of Working Group:
> >
> > The calsch WG develops standards to enable heterogeneous calendaring 
> > and
> > scheduling products and systems to interoperate.  Completed
> > standards-track work includes a specification for calendar objects and 
> > an
> > associated MIME type (RFC 2445, iCalendar), a transport-independent
> > protocol for exchanging and operating on calendar objects (RFC 2446,
> > iTIP), a message-based transport for iTIP (RFC 2447, iMIP), and 
> > definition
> > and discovery of calendar URIs (RFC 2739).  An informational document
> > (RFC 3283) provides an overview of the calendaring standards.
> >
> > An additional standard protocol in the suite provides access to and
> > management of calendar objects in a real-time client-server fashion; 
> > this
> > is the "Calendar Access Protocol" (CAP).  Submission of CAP as a 
> > Proposed
> > Standard is the remaining work item of the WG.
> >
> > Goals and Milestones:
> >
> > Sep 04	  	Submit Calendar Access Protocol document to IESG
> >                 for consideration as a Proposed Standard.
> >
> >
> >
> 



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Cc: IETF calsch WG <ietf-calendar@imc.org>,
        "RL 'Bob' Morgan" <rlmorgan@washington.edu>,
        Ted Hardie <hardie@qualcomm.com>,
        Scott Hollenbeck <sah@428cobrajet.net>
From: Nathaniel Borenstein <nsb@guppylake.com>
Subject: Re: proposed revised charter for IETF calsch WG
Date: Fri, 30 Jul 2004 17:35:04 -0400
To: Harrie Hazewinkel <harrie@inet.it>
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On Jul 30, 2004, at 4:06 PM, Harrie Hazewinkel wrote:

> I would support this...
>
> If the CAP RFC is published and the WG is closed the signal to
> implementors is clear.

While I never want to argue with people who are agreeing with me, I 
have to say that I do NOT view my plan as implying that it's time for 
everyone to implement CAP.  For my part, I believe that iCal as it 
stands is sufficiently flawed that *no* CAP-like protocol can be made 
to work really well.  I believe that we need to go back and clean up 
iCal, and that if we do that right it will make possible a much cleaner 
real-time access protocol.  In that sense, I want to send precisely the 
opposite signal from the one you infer.

I will welcome the publication of CAP, but given the state of iCal it 
will be hard for me to view it as anything more than a useful 
experiment, to be re-evaluated (and probably simplified) once we clean 
up (and simplify) iCal.  For that reason I will also argue for its 
publication with a status of Experimental rather than Proposed 
Standard.  -- Nathaniel



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Nathaniel Borenstein wrote:

>
> I am opposed to rechartering the calsch group.  My preference would be 
> to shut down the group entirely, and then start a new WG that is 
> narrowly focused on revisions to RFCs 2445-7.  I  am particularly 
> skeptical that work on CAP or any similar protocol based on those 
> RFC's should be done in the same group that is in the middle of 
> revising them.  I think progress will be much faster if we divide and 
> conquer, and that the (substantial) revisions that are necessary in 
> the base RFC's justifies a new group of its own.  -- Nathaniel


I agree. This WG needs to finish up. It has absorbed too many tasks that
conflict with each other. Many get upset when more than one task is
performed at a time and that is holding up individual submissions and other
ideas. I have been repeatedly asked NOT to submit the XML draft until 
after CAP.
Lets ship CAP and allow iCal to move forward.

In addition separate working groups can then focus on  specific tasks.

I do not think that RFC02445-7 have significant changes. They do however
have many typo's and a few corrections.

-- 

Doug Royer                     |   http://INET-Consulting.com
-------------------------------|-----------------------------
Doug@Royer.com                 | Office: (208)520-4044
http://Royer.com/People/Doug   | Fax:    (866)594-8574
                               | Cell:   (208)520-4044

              We Do Standards - You Need Standards



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