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Bug 1934 - R-118: Questions about the value space for dateTime
Summary: R-118: Questions about the value space for dateTime
Status: CLOSED FIXED
Alias: None
Product: XML Schema
Classification: Unclassified
Component: Datatypes: XSD Part 2 (show other bugs)
Version: 1.0 only
Hardware: All All
: P2 normal
Target Milestone: ---
Assignee: C. M. Sperberg-McQueen
QA Contact: XML Schema comments list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2005-09-01 16:42 UTC by Sandy Gao
Modified: 2009-04-21 19:24 UTC (History)
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Description Sandy Gao 2005-09-01 16:42:03 UTC 
1. The Datatypes spec states that "The value space of dateTime is the space of 
Combinations of date and time of day values as defined in 5.4 of [ISO 8601]." 
The implication of this is that 2002-02-02T12:00:00Z is a distinct value in the 
value space from 2002-02-02T07:00:00-05:00. But if this is so, then the 
canonical lexical representation (which is always in UTC with timezone 
designator Z) cannot represent all values in the value space. 
2. The description of the value space could also be read as indicating that 
12:00:00Z and 12:00:00+00:00 are distinct values, and that the year 02002 is 
distinct from the year 2002. 

See issues 3 and 4 from:
http://lists.w3.org/Archives/Public/www-xml-schema-
comments/2002JanMar/0476.html 

Also see a response:
http://lists.w3.org/Archives/Public/www-xml-schema-
comments/2002JanMar/0615.html
Comment 1 Sandy Gao 2005-09-01 16:45:31 UTC 
Erratum E2-41 [1] addresses this issue. Discussed/resolved at the June 12, 2003 
telecon [2].

[1] http://www.w3.org/2001/05/xmlschema-errata#e2-41
[2] http://lists.w3.org/Archives/Member/w3c-xml-schema-ig/2003Jun/0085.html