All groups may only be direct children of the model group! Make VINGroup 
an element and keep its content unordered:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
     <xsd:element name="vehicle">
         <xsd:complexType>
             <xsd:choice>
                 <xsd:sequence>
                     <xsd:element ref="VINGroup"/>
                     <xsd:element ref="VIN" minOccurs="0"/>
                 </xsd:sequence>
                 <xsd:sequence>
                     <xsd:element ref="VIN"/>
                     <xsd:element ref="VINGroup" minOccurs="0"/>
                 </xsd:sequence>
             </xsd:choice>
         </xsd:complexType>
     </xsd:element>
     <xsd:element name="VIN" type="xsd:string"/>
     <xsd:element name="VINGroup">
         <xsd:complexType>
             <xsd:all>
                 <xsd:element name="Body" type="xsd:string"/>
                 <xsd:element name="Make" type="xsd:string"/>
                 <xsd:element name="Model" type="xsd:string"/>
             </xsd:all>
         </xsd:complexType>
     </xsd:element>
</xsd:schema>

The instances will have an extra element (level) called VINGroup...  You 
have to live with it.

-Anli

On 10/6/2004 1:30 PM, Gary Fix wrote:
> The requirement is that I must have Either a VIN Or a VinGroup Or Both, And if I have a VinGroup, then All the elements of the VinGroup must be present, In Any Order...
> The last part is where I'm having difficulty as I cannot use "xsd:all" in the group definition in place of "xsd:sequence"...My Xerces parser complains...
> thanks!
> 
> Here's my xsd snippet so far but it requires the VinGroup elements to be in a sequence:
> 
> <xsd:element name="Vehicle">
> 	<xsd:complexType>
> 		<xsd:sequence>
> 			<xsd:choice minOccurs="1" maxOccurs="1">
> 				<!-- Case #1: VIN & Body/Make/Model Group Supplied -->
> 				<xsd:sequence>
> 					<xsd:element ref="VIN"/>
> 					<xsd:group ref="VINGroup" minOccurs="1" maxOccurs="1"/>
> 				</xsd:sequence>
> 				<!-- Case #2: VIN Only Supplied -->
> 				<xsd:sequence>
> 					<xsd:element ref="VIN" minOccurs="1"/>
> 				</xsd:sequence>
> 				<!-- Case #3: Body/Make/Model Group Only Supplied -->
> 				<xsd:sequence>
> 					<xsd:group ref="VINGroup" minOccurs="1" maxOccurs="1"/>
> 				</xsd:sequence>
> 			</xsd:choice>
> 		</xsd:sequence>
> 	</xsd:complexType>
> </xsd:element>
> <xsd:group name="VINGroup">
> 	<xsd:sequence>
> 		<xsd:element name="Body" type="xsd:string"/>
> 		<xsd:element name="Make" type="xsd:string"/>
> 		<xsd:element name="Model" type="xsd:string"/>
> 	</xsd:sequence>
> </xsd:group>
> 
> -----Original Message-----
> From: Anli Shundi [mailto:ashundi@t...]
> Sent: Wednesday, October 06, 2004 10:24 AM
> To: Michael Kay
> Cc: Gary Fix; xmlschema-dev@w...
> Subject: Re: How ensure group elements exist and in any order
> 
> 
> On 10/6/2004 11:54 AM, Michael Kay wrote:
> 
>>>But the all group would allow also none of the elements.
>>
>>
>>Not if the element specifies minOccurs="1".
>>
> 
> 
> but in that case an all group wouldn't allow only a or only b.  I 
> thought that was a requirement.
> 
> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
>      <xsd:element name="root">
>          <xsd:complexType>
>              <xsd:choice>
>                  <xsd:sequence>
>                      <xsd:element ref="a"/>
>                      <xsd:element ref="b" minOccurs="0"/>
>                  </xsd:sequence>
>                  <xsd:sequence>
>                      <xsd:element ref="b"/>
>                      <xsd:element ref="a" minOccurs="0"/>
>                  </xsd:sequence>
>              </xsd:choice>
>          </xsd:complexType>
>      </xsd:element>
>      <xsd:element name="a" type="xsd:string"/>
>      <xsd:element name="b" type="xsd:string"/>
> </xsd:schema>
> 


-- 
Anli Shundi					ashundi@t...
TIBCO Software Inc.				office: (919) 969-6518
www.tibco.com


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