- From: Eddie Robertsson <erobertsson@allette.com.au>
- Date: Fri, 26 Apr 2002 10:03:53 +1000
- To: Faiz A Currim <fcurrim@bpa.arizona.edu>
- CC: xmlschema-dev@w3.org
Hi Faiz, > Is it possible to define a new construct (i.e. like "element", > "attribute" ...) using XSchema that extends one of the old constructs? Yes, but keep in mind that you do in fact extend the _types_ of the elements and attributes, not the actual element or attribute itself. > >From what i've been able to determine, this is done in the XSchema > definition itself in the following way: > > <xs:complexType name="element" abstract="true" mixed="false"> > <xs:complexContent> > <xs:extension base="xs:annotated"> > <xs:sequence> > ... > so it would seem that "element" extends "annotated". Correct. > However if i try to extend "element" in an external .xsd file - using a > similar style as above: > <xs:complexType name="myElement" abstract="true" mixed="false"> > <xs:complexContent> > <xs:extension base="xs:element"> > <xs:sequence> > ... > > the validator always stops me with an "xs:element is an invalid value for > the extension base". This is because you can't extend the element itself. Instead you have to extend the type of xs:element. Cheers, /Eddie
Received on Thursday, 25 April 2002 19:52:05 UTC