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   Mixed contents and group in schema definition

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  • From: Pierre Attar <patt@tireme.fr>
  • To: xml-dev@xml.org
  • Date: Fri, 07 Jul 2000 16:05:36 +0200


I'm trying to understand Schema and I would like to use groups for defining 
shared mixed contents.

Using XML DTD, my declatations looks like :


Note: PCDATA is twice reused just because I was not able to put something 
like :

Nevertheless, converting to Schema, XML authority provides :

         <element name = "FIRST">
                 <complexType content = "mixed">
                         <element ref = "B"/>
                         <element ref = "I"/>
                         <element ref = "CMD"/>
                         <element ref = "CAP"/>
         <element name = "LAST">
                 <complexType content = "mixed">
                         <element ref = "B"/>
                         <element ref = "I"/>
                         <element ref = "CMD"/>
                         <element ref = "CAP"/>

For maintenance purpose, I prefer to use the group mechanism, in order to 
have :

         <xsd:group name="textContent">
                 <xsd:choice minOccurs="0" maxOccurs="unbounded">
                         <xsd:element name="B" type="textType"/>
                         <xsd:element name="I" type="textType"/>
                         <xsd:element name="CMD" type="textType"/>
                         <xsd:element name="CAP" type="textType"/>


         <xsd:complexType name="textType" content="mixed">
                 <xsd:group ref="textContent"/>

For being able to have declarations like :

         <element name = "AUTHOR">
                 <complexType content = "elementOnly">
                                 <element name= "FIRST" type="textType"/>
                                 <element name= "LAST" type="textType"/>

This does not work because the mixed content is not recognize and I a no 
more able to have mixed contents : <FIRST>Here is a <B>real</B> test </FURST>.

Any ideas would be welcome ...


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