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RE: Who can implement W3C XML Schema ?

  • To: 'Ronald Bourret' <rpbourret@r...>, xml-dev@l...
  • Subject: RE: Who can implement W3C XML Schema ?
  • From: "CHIUSANO, Joseph" <JCHIUSANO@l...>
  • Date: Fri, 22 Mar 2002 16:36:06 -0500
  • Return-receipt-to: "CHIUSANO, Joseph" <JCHIUSANO@l...>

RE:  Who can implement W3C XML Schema ?
Title: RE: Who can implement W3C XML Schema ?

what is the point of allowing an xsd:restriction element with no children?

If I read your question correctly (apologies if I'm not), here's a case where this *might* be useful:

Suppose I've defined a simple type of string length 5 as follows:

        <xsd:simpleType name = "StringLength5Type">
                <xsd:restriction base = "xsd:string">
                        <xsd:maxLength value = "5" fixed = "true"/>

I can reuse this definition in other simple type definitions - for instance, to declare another simple type that is also string length 5:

<xsd:simpleType name = "SomeNewCodeType">
     <xsd:restriction base = "StringLength5Type"/>

Joe Chiusano

> **************************************************************************
>   Joseph M. Chiusano
>   Logistics Management Institute
>   2000 Corporate Ridge
>   McLean, VA 22102
>   Email: jchiusano@l...
>   Tel: 571.633.7722
> **************************************************************************

-----Original Message-----
From: Ronald Bourret [mailto:rpbourret@r...]
Sent: Friday, March 22, 2002 4:21 PM
To: xml-dev@l...
Subject: Re: Who can implement W3C XML Schema ?

OK. Now that I finally understand why this is invalid, what is the point
of allowing an xsd:restriction element with no children? Is it
specifically to allow me to restrict content down to emptiness and yet
still get the OO advantages (?) of using a restriction?

-- Ron

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