[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

RE: xsi:type handling

xsi type xerces
If you declare an element to be of type MyDerivedFromShortType, then you can
use xsi:type to further restrict it to a subtype of MyDerivedFromShortType,
but you can't relax the restrictions by making it an xs:short.

I wouldn't personally derive a restricted integer value from short, unless
you have some reasons I don't know about. The type you've defined could just
as validly be derived from xs:byte, or xs:unsignedInt, or
xs:nonNegativeInteger. If there are no structural semantics (like
"pass-grade" being derived from "grade") I prefer to derive such types
directly from xs:integer. So long as you're only doing validation it doesn't
really matter, but once you start using typed values in your application it
makes a difference.

Michael Kay

> -----Original Message-----
> From: Yves Langisch [mailto:lists@l...] 
> Sent: 23 May 2005 09:19
> To: xml-dev@l...
> Subject:  xsi:type handling
> All,
> I have a derived type from short in my schema such as:
>      <xs:simpleType name="MyDerivedFromShortType">
>          <xs:restriction base="xs:short">
>              <xs:minInclusive value="1"/>
>              <xs:maxInclusive value="100"/>
>          </xs:restriction>
>      </xs:simpleType>
> My question now is, if following line in a instance document is valid?
>         <ns2:MyDerivedFromShort
> xsi:type="xsd:short">99</ns2:MyDerivedFromShort>
> When parsing this with Xerces it will throw
> Validation error: LineNumber: 48 ColumnNumber: 2883 Message: 
> cvc-elt.4.3: Type 'xsd:short' is not validly derived from the type 
> definition, 'MyDerivedFromShortType', of element
> 'ns2:MyDerivedFromShort'.:
> Can someone confirm that Xerces' behaviour is reasonable?
> Thanks
> Yves
> -----------------------------------------------------------------
> The xml-dev list is sponsored by XML.org <http://www.xml.org>, an
> initiative of OASIS <http://www.oasis-open.org>
> The list archives are at http://lists.xml.org/archives/xml-dev/
> To subscribe or unsubscribe from this list use the subscription
> manager: <http://www.oasis-open.org/mlmanage/index.php>


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.