RE: When is T designator required with duration?

Oh boy!  English!  How about
"The designator 'T' must be absent if all of the time items are absent"


All the best, Ashok 
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-----Original Message-----
From: James Clark [mailto:jjc@jclark.com] 
Sent: Sunday, April 28, 2002 5:11 AM
To: www-xml-schema-comments@w3.org
Subject: When is T designator required with duration?

3.2.6.1 says:

 "The designator 'T' shall be absent if all of the time items are
absent"

Shouldn't this be "if and only if" rather than "if"?  I don't think 
something like P24H can be allowed since there would be an ambiguity 
whether M meant months or minutes.  (The use of "shall" here feels
rather 
ISO-ish; tt would be more stylistically consistent to use "must".)

James