<xs:group name="allModel" >
  <xs:sequence>
    <xs:element minOccurs="0" ref="xs:annotation"/>
    <xs:choice minOccurs="0" maxOccurs="unbounded">
      <xs:annotation>
        <xs:documentation>This choice with min/max is here to
                          avoid a pblm with the Elt:All/Choice/Seq
                          Particle derivation constraint</xs:documentation>
      </xs:annotation>
      <xs:element name="element" type="xs:narrowMaxMin"/>
    </xs:choice>
  </xs:sequence>
</xs:group>