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RE: xsd:duration datatype validation

From: Klotz, Leigh <Leigh.Klotz@xerox.com>
Date: Tue, 16 May 2006 14:14:49 -0700
Message-ID: <E254B0A7E0268949ABFE5EA97B7D0CF401D56039@usa7061ms01.na.xerox.net>
To: <www-forms@w3.org>
Cc: "David Landwehr" <david.landwehr@solidapp.com>, "Allan Beaufour" <beaufour@gmail.com>

xsd:duration has a problem when used as a concrete type.  Its subtypes,
dayDateDuration and dateTimeDuration are well specified, but they are
not commensurable; e.g., which is longer -- 29 days or one month? If you
do a Google search on "xsd:duration" this issue shows up as the #2
hit...

So to avoid potential problems, someone (I believe Micah Dubinko)
proposed that we require support only for the leaf types and leave
xsd:duration as an abstract type. Somehow the rationale for this got
left out.  I believe the belief at the time was that the XML Schema WG
would be issuing such a note themselves.  It appears that this work got
pushed to XPath 2.0 / XML Query according to some presentations by Ashok
Malhotra.  Probably this issue will come up again in the context of
XPath 2.0 but it should be clearer this time.

Leigh. 

-----Original Message-----
From: www-forms-request@w3.org [mailto:www-forms-request@w3.org] On
Behalf Of Allan Beaufour
Sent: Tuesday, May 09, 2006 7:42 AM
To: David Landwehr
Cc: www-forms@w3.org
Subject: Re: xsd:duration datatype validation


On 5/9/06, David Landwehr <david.landwehr@solidapp.com> wrote:
> I have reread section 5.1 again and again in relation to the
discussion
> about datatype etc. Now I see that there are some IMO strange wording
> regarding xsd:duration. This wording states: "XForms supports all XML
> Schema datatypes
> <http://www.w3.org/TR/xforms/index-all.html#def-datatype> except for
> |xsd:duration". What does this mean (e.g. what happens if a node has
the
> type xsd:duration) and what is the intention of not including
> xsd:duration. |

Hmm, it also seems weird to me. I have no explanation for that.

--
... Allan
Received on Tuesday, 16 May 2006 21:15:26 GMT

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