- From: Ashok Malhotra <ashokma@microsoft.com>
- Date: Thu, 12 Dec 2002 05:15:33 -0800
- To: "Schluter, Paul (MED, GEMS-IT)" <Paul.Schluter@med.ge.com>, "W3C XML Schema Comments list" <www-xml-schema-comments@w3.org>
Paul: As the attached note says 24:00:00 is allowed. But it also says that it is an alternate representation for 00:00:00 (of the following day). This is not what you want. In the presence of a leap second you want 24:00:00 to be the final second of the current day and 00:00:00 the following second of the next day. We need to craft some careful wording to cover this situation. All the best, Ashok -----Original Message----- From: Schluter, Paul (MED, GEMS-IT) [mailto:Paul.Schluter@med.ge.com] Sent: Wednesday, December 11, 2002 4:59 PM To: W3C XML Schema Comments list Subject: RE: 24:00:00 allowed or not Wednesday, December 11, 2002, Ashok and James, I noticed this thread in the W3C email archives regarding whether 24:00:00 should be allowed or not. It _must_ be allowed, because the time "24:00:00" can actually exist when a leap-second is inserted at midnight. Leap-second insertion typically occurs every 18 months or so, principally to account for the gradual slowing of the earth's rotation over time (roughly 1.7 msec/day/century). Leap seconds are supported by NTP (RFC-1305) and SNTP (RFC-2030) and are recognized in numerous other areas such as astronomy where accurate timekeeping is required. Regards, Paul Schluter =========================================================== Date: Tue, 23 Apr 2002 06:40:06 -0700 Message-ID: <E5B814702B65CB4DA51644580E4853FB019EEB02@red-msg-12.redmond.corp.micros oft.com> From: "Ashok Malhotra" <ashokma@microsoft.com> To: "James Clark" <jjc@jclark.com>, <www-xml-schema-comments@w3.org> Subject: RE: 24:00:00 allowed or not? 24:00:00 is allowed. It is an alternate representation for 00:00:00 All the best, Ashok =========================================================== -----Original Message----- From: James Clark [mailto:jjc@jclark.com] Sent: Tuesday, April 23, 2002 6:19 AM To: www-xml-schema-comments@w3.org Subject: 24:00:00 allowed or not? ISO 8601 section 5.3.2 allows 24:00:00 as a representation of midnight. Appendix D of XML Schema Part 2 says that the hh field runs between 0 and 23, but there is no mention of 24:00:00's not being allowed as a difference between XML Schema and ISO 8601. I'm left uncertain as to whether 24:00:00 is allowed or not. James
Received on Thursday, 12 December 2002 08:16:00 UTC