RE: xsi:type handling
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 http://www.saxonica.com/ > -----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> > >
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