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Subject: DRAFT MINUTES - Web Services Calendar (WS-Calendar) TC - 2 April 2010
Draft minutes of the TC meeting are available at
http://www.oasis-open.org/apps/org/workgroup/ws-calendar/download.php/37244/Minutes_WS-Calendar-TC_20100402_Draft.txt
Regards,
Gershon Janssen
---
DRAFT MINUTES
Web Services Calendar (WS-Calendar) TC
2 April 2010 12:00pm ET, 06:00pm CET
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NEW ACTION ITEMS:
- Kavi #0011 / AI20100402-001 - Benoit Lepeuple
Due: 14 April 2010
Provide references to OPC 3.0 specs on time.
- Kavi #0012 / AI20100402-002 - Benoit Lepeuple
Due: 14 April 2010
Draw up a short outline on timestamping, data timestamping in OPC, etc.
Scribe: Gershon Janssen
0. Roll call, Agenda review
Meeting Attendees
Name Company Status
----- ------- ------
Toby Considine University of North Carolina Chair
Gershon Janssen Individual Secretary
William Cox Cox Software Architects LLC Member
Ed Koch Akuacom Inc. Member
Benoit Lepeuple LonMark International* Member
Jeremy Roberts LonMark International* Member
David Thewlis CalConnect Member
Robert Old Siemens AG Member
Gale Horst Electric Power Research Inst Member
Bernard Desruisseaux Oracle Corporation Observer
This meeting quorates.
No changes and / or additions to the agenda.
1. Minutes Approval
Meeting minutes of 26 March 2010
(http://www.oasis-open.org/apps/org/workgroup/ws-calendar/download.php/37159/Minutes_WS-Calendar-TC_20100326_Draft.txt)
are approved unanimously.
2. FYI / announcements from Chair, Secretary, Liaison
Chair:
Gershon Janssen: T: contributions are porsted on the comments list; Toby put documents in repository.
Secretary, Liaison:
Gershon Janssen: No comments from Gershon and liaison David.
3. Open Action Item Review and Discussion
For action items overview, please refer to:
http://www.oasis-open.org/apps/org/workgroup/ws-calendar/members/action_items.php
- Kavi #0000 / AI20100305-001 - Toby Considine Request Jira access for the TC Issues list
Access has been requested; pending response.
- Kavi #0001 / AI20100305-003 - William Cox create a draft FAQ
Bill didn't get to this; will draw up something in a couple of days.
- Kavi #0002 / AI20100305-004 - Carl Mattocks contribute uses cases on ebXML RegReg
Work is being performed on the use case and will be send in in due time.
- Kavi #0003 / AI20100305-005 - William Cox send a draft overview of more detailed tasks for the TC to the list
Bill is not sure what this is about; will check with Gershon after the meeting.
- Kavi #0004 / AI20100319-001 - Toby Considine Put link to modern iCalendar and expository material on the TC home page
In progress.
- Kavi #0006 / AI20100326-001 - William Cox Send requirements on subject ordering to the list
In progress.
- Kavi #0007 / AI20100326-002 - Toby Considine Write up schedule objects and send to email list
WD02 document has been sent to the email list; action item completed.
- Kavi #0008 / AI20100326-003 - William Cox Send requirement on attachment of things to intervals to list
In progress.
- Kavi #0009 / AI20100326-004 - Eric Chan Direct TC to calendar requirements of ICOM
Eric is not on the call; no updates on this item.
- Kavi #0010 / AI20100326-005 - Toby Considine Discuss with Eric and Oracle on contribution of ICOM materials to TC
Oracle is now only attending as observer. Toby welcomes suggestions on how to work on this.
4. Discuss issues
* Discuss draft FAQ
Item deffered pending input; related to action item Kavi #0001.
* Classification of how many things are WS-Calendar
Gershon Janssen: Suggestion to first read up on document WD02
http://www.oasis-open.org/apps/org/workgroup/ws-calendar/download.php/37135/WS-Calendar-1%200-spec-wd-02.pdf
Gershon Janssen: Item moved to next weeks agenda.
* OS timestamping / William Cox
Gershon Janssen: B: explains fundamental idea on OS timestamping
Gershon Janssen: 2 times are kept in OS: time of day in seconds from epoch (1970), subsecond time
Gershon Janssen: objects managing timestaps should have sync amongst each other
Gershon Janssen: format of timestamp should be clear to all objects using it
Gershon Janssen: timestamping at granularity level of seconds should be enough
Gershon Janssen: System 5 release 4 time standard should be used as Bill suggests
Gershon Janssen: Granularity of time we should be using should be related to granularity as defined in ISO80601; second
level seems sufficient.
Gershon Janssen: Two issues (1) How fine we describe and (2) in what domain the resolution is meaningfull
Gershon Janssen: Requirement we have is an assertion of accuracy required
Gershon Janssen: Benoit: there is an issue as not always there is a choice on format of time
Gershon Janssen: Bill: two items -- (1) how to format the time (2) Quality of Time data
Gershon Janssen: T: Difference between granularity and accuracy
Gershon Janssen: Quality of Time or time domain is an important aspect related to the spec
Gershon Janssen: T: Timestamp is a low level object in the spec
Gershon Janssen: T: maybe we can come up with a quality of timestamp description consisting out of 3 or 4 elements from
the discussion
Gershon Janssen: Benoit: quality of timestamp -- see OPC 3.0 spec for some interesting insights
Gershon Janssen: Benoit: timestamp type -- is there anything in the reference documentation from OASIS related to the
basic types which could be reused?
Toby Considine: Action: Benoit to provide references to OPC 3.0 specs on time
Toby Considine: WTC: Reliable Messaging as a source?
Gershon Janssen: Bill: doesn't think there is something, but maybe there is something in WS-Reliable Messaging area.
Toby Considine: GUID for the organizing entity?
Gershon Janssen: Sequence numbers could help with times not being completely synced;
Gershon Janssen: T: maybe source and sequence should be specified with a timestamp
Gershon Janssen: Items to address: resolution, accuracy, how to carry this information, sequencing within a particular
realm.
Gershon Janssen: Bill: research needed in timestamping area -- there might be things specified in other specs already
Gershon Janssen: T: this is one of the realms not fully specified in the iCalendar spec
Gershon Janssen: T: WS-Calendar will maybe different from iCalender on this item
Gershon Janssen: Benoit: we will not find something on fine grained time specification, but there is some on time
syncing -- resolution and accuracy on the clock should be included in time for e.g. devices
Gershon Janssen: T: we have a concept of interval and granularity on interval sets; is granularity in this dicussion the
same?
Gershon Janssen: Reminders in iCalendar are defined to remind in minutes, hours, week, etc. so the subject of interval
could maybe reuse the iCalendar elements on this
Gershon Janssen: T: We have a couple of perspective on the subject to timestamping -- can each of the proposers send
some paragraphs on there perspective to the list for dicussion during the next meeting?
Gershon Janssen: Benoit: will create a short outline on timestamping, data timestamping in OPC, etc.
Gershon Janssen: Benoit: is off next week and will not join the next meeting, but can send something in 1.5 week
Gershon Janssen: Action Item Benoit, due in 1.5 weeks for discussion in 2 weeks during the TC call
5. Any Other Business?
Gershon Janssen: T: agenda items for next week -- read up on WD02; comments are most welcome
Gershon Janssen: T: look into documents in document section in Kavi
Gershon Janssen: T: look at links on EIS Alliance Use Case Version 2.0
Gershon Janssen: Benoit: for next weeks agenda: when exchanging information w/timestamping, requirement on source and
destination clock awareness for timestamping -- you otherwise never know where the time comes from.
Gershon Janssen: Benoit: maybe some short text about this in the spec in order to determine source of the timestamp
Gershon Janssen: T: other topic for future week: sequence and time expectations -- determine if this in in / out of
scope of WS-Calendar spec
6. Adjourn
Gershon Janssen: Meeting adjourned
Jeremy J. Roberts: time() = 1270227780
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