fyi
"If something is not worth doing, it`s not worth doing well" - Peter Drucker
Toby Considine OASIS Technical Advisory Board TC Editor: EMIX, EnergyInterop U.S. National Inst. of Standards and Tech. Smart Grid Architecture Committee | | Email: Toby.Considine@gmail.com http://www.tcnine.com/ |
From: tc-xml-l-bounces@lists.calconnect.org [mailto:tc-xml-l-bounces@lists.calconnect.org] On Behalf Of Tong Li
Sent: Monday, June 14, 2010 4:17 AM
To: Mike Douglass
Cc: tc-xml-l-bounces@lists.calconnect.org; tc-xml-l@lists.calconnect.org
Subject: Re: [tc-xml-l] Is there a difference?
A) and B) seem the same but can vary quite bit.. A) says that the X lasts one hour, however B) says start at 2:00 and end at 3:00, but it may not be one hour, consider DST time, it could be two hours, or 1 hour 45 minutes, there is one timezone which DST time starts at 1:45am. Using starting and ending can possibly lead to problems without further information. Keep thinking about RESTful, I would recommend take A). This is the lesson learned from real product. We were using starting and ending, because all the DST problems, we changed it to starting and duration. It has worked a lot better.
On the question of if we should allow both, I would say one is better purely from a programmer's perspective.
Just 2 cents.
Thanks.
Tong Li
LotusLive iNotes Calendar Architect
Unit 1106-08, Cyberport 2
100 Cyberport Road,
Pokfulam, Hong Kong
(852) 3515-5159
litong01@us.ibm.com
Mike Douglass ---06/11/2010 11:07:43 AM---There's probably no good reason for both other than some prefer one over the other as a UI issue.
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There's probably no good reason for both other than some prefer one over the other as a UI issue.
A) is almost always a good choice.
C) is not allowed and really means the same as A) only more confusing
On 06/10/2010 10:00 AM, Arnaud Quillaud wrote:
On 10/06/10 15:50, Toby Considine wrote:
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?
I guess they are equivalent except when the start/end is crossing a DST boundary (in which case a 00:00 to 04:00 might last for only 3 hours or 5 hours depending on the daylight saving change).
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 | Email: Toby.Considine@gmail.com |
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--
Mike Douglass douglm@rpi.edu
Senior Systems Programmer
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Rensselaer Polytechnic Institute 110 8th Street, Troy, NY 12180
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