<xsd:complexType name="poType">
<xsd:sequence>
<xsd:element name="billTo" type="addressType"/>
<xsd:element name="shipTo" type="addressType"/>
<xsd:element name="order">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="item" type="itemType" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
<xsd:attribute name="id" use="required" type="xsd:positiveInteger"/>
<xsd:attribute name="submitted" use="required" type="xsd:date"/>
</xsd:complexType>
