RE: [smartgrid-interest] Is there a difference? (Time and Schedule)

In CIM and OpenSG I believe they use start/end. I think the reason is that even though meter reads may be scheduled every 15 min or prices published every 5 min, occasionally the read or the published time does not happen on a regular duration. While a start/duration would work with a variable duration, I think we should be consistent with their start/end practice.

Edward G. Cazalet, Ph.D.

101 First Street, Suite 552

Los Altos, CA 94022

650-949-5274

cell: 408-621-2772

ed@cazalet.com

www.cazalet.com

From: David RR Webber (XML) [mailto:david@drrw.info]
Sent: Thursday, June 10, 2010 7:20 AM
To: Toby.Considine@gmail.com
Cc: smartgrid-interest@lists.oasis-open.org
Subject: RE: [smartgrid-interest] Is there a difference? (Time and Schedule)

Toby,

Re-casting this:

1) Start / Duration

2) Start / End

The only snag I see with 2) is this:

2) 14:00 / 1:00

and I assume for Duration is has to be fully qualified - e.g. 01:00:00 and not just 1

Thanks, DW

p.s. They are using military time, right?!

-------- Original Message --------
Subject: [smartgrid-interest] Is there a difference? (Time and
Schedule)
From: "Toby Considine" <Toby.Considine@gmail.com>
Date: Thu, June 10, 2010 10:07 am
To: <smartgrid-interest@lists.oasis-open.org>

I am thinking about information and conformance in schedules, and I want to ask for a broader perspective than in the WS-Calendar committee. Note I am *not asking* for contributions to the committee, I am asking for perspectives on what the standard should support. Note that there is always a tension between “support everything” and “interoperation”

The WS-Calendar current draft is out for public comment. It is in many ways a WS instantiation of iCalendar and related IETF specifications. At its core is a series of time slices based upon the well-known vtodo object. Each slice may reference a usage a price, or any other information artifact. Assume it is a series or energy prices or a series of DR requests…..

As I meditate on this object I arrive at the following question:

What’s the difference in *actions*, and in *performance* between

A)   Do X beginning at 2:00 for an hour duration

B)   Do X beginning at 2:00 for and ending at 3:00

C)   Do X for an hour ending at 3:00

All are possible using the VTODO data structure.

One (C) is not allowed if I understand correctly

Within any interaction, it would be simpler, cleaner to allow only (A) or (B)

Do we need to allow both?

Does B have a finite stop and A does not?

Why would we support both?

tc

“It is difficult to get a man to understand something, when his salary depends upon his not understanding it” -- Upton Sinclair.

Toby Considine
TC9, Inc

OASIS Technical Advisory Board
TC Chair: oBIX & WS-Calendar

TC Editor: EMIX, EnergyInterop

U.S. National Inst. of Standards and Tech. Smart Grid Architecture Committee



Email: Toby.Considine@gmail.com
Phone: (919)619-2104

http://www.tcnine.com/
blog: www.NewDaedalus.com

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