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Topic  
Postnext
matt coleSubject: xsd question
Author: matt cole
Date: 20 Jun 2005 08:52 PM
Originally Posted: 20 Jun 2005 08:37 PM
Hi,<br> I'm pretty much a newbie to xsd's in general, and have a case in a schema I'm designing that I'm not sure how to solve. Basically I have a situation like this: (sorry i can't figure out how to post markup which renders properly) <parenttype> <category>Standard</category> <standardcategorynodes> <a/> <b/> </standardcategorynodes> </parenttype> <parenttype> <category>Special</category> <specialcategorynodes> <c> <d/> <c/> </specialcategorynodes> </parenttype> where the parent node type is the same, but depending on the value of the category node, subsequent nodes are different. I thought a good solution would be to have a xs:choice, where each choice has a fixed value for the category node and then the relevant subsequent nodes follow but I get a Unique Particle Attribution violation as both choices have a category node. Is there a solution for this type of situation or will i have to workaround it somehow? Thanks very much, Matt

Postnext
Ivan PedruzziSubject: xsd question
Author: Ivan Pedruzzi
Date: 23 Jun 2005 10:09 PM
Hi Matt,

XML Schema is not capable to represent a structure variation based on content.

Ivan Pedruzzi
Stylus Studio Team

Posttop
dan thompsonSubject: xsd question
Author: dan thompson
Date: 04 Jul 2005 10:55 AM
Try this XSD, hope it helps.

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:element name="Substitution_Root">
<xs:annotation>
<xs:documentation>Substitution Groups allow you to define different content for a single node</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element name="a"/>
<xs:element name="b"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Substitution_1" substitutionGroup="Substitution_Root">
<xs:annotation>
<xs:documentation>If you name the substitution groups 'standard' and 'special' this may solve your problem</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element name="c"/>
<xs:element name="d"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>

   
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