<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="Process">
     <xs:complexType>
        <xs:sequence>
           <xs:element name="OrderNumber" type="xs:positiveInteger" />
           <xs:group ref="ContactDetails" />
        </xs:sequence>
     </xs:complexType>
  </xs:element>
  <xs:group name="ContactDetails">
     <xs:sequence>
        <xs:element name="Salutation" type="xs:string" minOccurs="0" />
        <xs:element name="Name" type="xs:string"/>
        <xs:element name="Address" type="xs:string"/>
        <xs:element name="City" type="xs:string"/>
        <xs:element name="State" type="xs:string"/>
        <xs:element name="Country" type="xs:string"/>
     </xs:sequence>
  </xs:group>
</xs:schema>