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    copied!<p>Yes, XSD can handle this. I generated this schema from Visual Studio 2008 (much faster than doing it by hand) and it will do what you're looking for:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema"&gt; &lt;xs:element name="root"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element name="items"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element name="group"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element maxOccurs="unbounded" name="item"&gt; &lt;xs:complexType&gt; &lt;xs:attribute name="name" type="xs:string" use="required" /&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;xs:attribute name="name" type="xs:string" use="required" /&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;xs:element name="data"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element name="group"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element maxOccurs="unbounded" name="customer"&gt; &lt;xs:complexType&gt; &lt;xs:sequence&gt; &lt;xs:element maxOccurs="unbounded" name="item"&gt; &lt;xs:complexType&gt; &lt;xs:attribute name="name" type="xs:string" use="required" /&gt; &lt;xs:attribute name="count" type="xs:unsignedByte" use="required" /&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;xs:attribute name="name" type="xs:string" use="optional" /&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;xs:attribute name="name" type="xs:string" use="required" /&gt; &lt;xs:attribute name="place" type="xs:string" use="required" /&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:sequence&gt; &lt;/xs:complexType&gt; &lt;/xs:element&gt; &lt;/xs:schema&gt; </code></pre>
 

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