- From: Jim Melton <jim.melton@acm.org>
- Date: Mon, 10 Dec 2001 12:38:26 -0700
- To: "Ashok Malhotra" <ashokma@microsoft.com>
- Cc: <w3c-xml-schema-ig@w3.org>, <w3c-query-operators@w3.org>, <xmlschema-dev@w3.org>
- Message-Id: <4.3.2.7.2.20011210123418.038dbd78@gmstimap.oraclecorp.com>
Ashok, et al, I have no objection to the proposal to require a minimum of 8 fractional digits in a conforming processor, but I would like to observe that not all platforms (hardware and operating system combined) will be able to provide *meaningful* values for the farther right of those digits. (In other words, not all clocks tick at intervals of 100 nanoseconds or less; some clocks tick at the microsecond, or even millisecond, level.) Therefore, we must make it clear that a conforming processor must be tolerant of values specified to 8 fractional digits of precision, but that they are not required to *generate* such values with digits other than zeros on the trailing end. That means that a processor that generated a dateTime value of 2002-01-01T12:15:22.12300000 every time it's invoked during the millisecond in question would be conforming. Thanks, Jim At 03:25 PM 2001-12-09 -0800 Sunday, Ashok Malhotra wrote: >For this specification, all minimally conforming processors must support >year values with a minimum of 4 digits (i.e., YYYY) and a minimum >fractional second precision of 100 nanoseconds or eight digits (i.e. >s.ssssssss). However, conforming processors may set larger >application-defined limits on the maximum number of digits they support in >these two situations, in which case those application-defined maximum >numbers must be clearly documented. ======================================================================== Jim Melton --- Editor of ISO/IEC 9075-* (SQL) Phone: +1.801.942.0144 Oracle Corporation Oracle Email: mailto:jim.melton@oracle.com 1930 Viscounti Drive Standards email: mailto:jim.melton@acm.org Sandy, UT 84093-1063 Personal email: mailto:jim.melton@acm.org USA Fax : +1.801.942.3345 ======================================================================== = Facts are facts. However, any opinions expressed are the opinions = = only of myself and may or may not reflect the opinions of anybody = = else with whom I may or may not have discussed the issues at hand. = ========================================================================
Received on Monday, 10 December 2001 14:41:27 UTC