Martin:

Congratulations on and thank you for a most useful paper.

In the Open Travel Alliance (www.opentravel.org) version 1 specification we 
ran into the time zone issue, where UTC notation does not appear to solve 
the problem of daylight savings times or those localities that do not 
follow daylight savings time.  Examples are the states of Indiana and 
Arizona in the USA.  We covered the issue by putting in longitude and 
latitude -- what we called GeoCodes -- using ISO 6709 notation to indicate 
precise locations.  With GeoCodes, trading partners need to translate 
locations into time policies of those locations.  With a growing number of 
business applications based on precise geographic locations (not just for 
time zones) you may want to consider adding geographic notation as a datatype.

See http://www.ftp.uni-erlangen.de/pub/doc/ISO/english/ISO-6709-summary for 
a summary of ISO 6709 notation.  Best regards.

Alan Kotok
[EMAIL PROTECTED]
+1 703-518-4174



At 04:42 PM 4/13/00 +0100, Martin Bryan wrote:
>As part of the CEN/ISSS work on Defining and Managing Semantics and 
>Datatypes (DAMSAD) I have produced a draft summary of those parts of the 
>XML Schema datatypes likely to be immediately relevant to the B2B 
>community. You will find this on my website at 
>http://www.sgml.u-net.com/schema-datatypes.doc
>
>Suggestions for "missing components" and/or notes re errors, 
>misintepretations, better examples, etc, would be much appreciated.
>
>Martin Bryan
>
>
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