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Re: Question on using xs:pattern to restrict xs:dateTime

• To: "Henry S. Thompson" <ht@c...>
• Subject: Re: Question on using xs:pattern to restrict xs:dateTime
• From: "Dare Obasanjo" <kpako@y...>
• Date: Fri, 4 Jan 2002 07:50:16 -0800
• Cc: "xml-dev" <xml-dev@l...>
• References: <001901c19560$7e950920$0500a8c0@carnage> <f5b8zbexrrq.fsf@c...>

----- Original Message -----
From: "Henry S. Thompson" <ht@c...>
To: "Dare Obasanjo" <kpako@y...>
Cc: "xml-dev" <xml-dev@l...>
Sent: Friday, January 04, 2002 3:46 AM
Subject: Re:  Question on using xs:pattern to restrict xs:dateTime


> "Dare Obasanjo" <kpako@y...> writes:
>
> > Is this a valid schema
> >
> > <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
> > <xsd:simpleType name="myTimeType">
> >       <xsd:restriction base="xsd:dateTime">
> >         <xsd:pattern value="\d\d:\d\d(:\d\d)?" />
> >          <xsd:whiteSpace value="collapse" />
> >       </xsd:restriction>
> > </xsd:simpleType>
> > </xsd:schema>
>
> I don't think so -- \d is not a valid W3C XML Schema pattern regexp
> component, on my reading of the REC.

Interesting I though it was part of

http://www.w3.org/TR/xmlschema-2/#nt-MultiCharEsc

[37]    MultiCharEsc    ::=    '.' | ('\' [sSiIcCdDwW])

> > and if so why? If not, is there any validating parser that will give an
error
> > message on validating it.
>
> Sorry, XSV doesn't touch the pattern facet at all
>

Why not? From what I've seen the pattern facet can easily be made to create
illegal restrictions which none of the validating parsers I have tried warns
about.

--
THINGS TO DO IF I BECOME AN EVIL OVERLORD #16
I will never utter the sentence "But before I kill you, there's just
one thing I want to know."


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