<?xml version="1.0"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.example.com/PurchaseOrder" xmlns="http://www.example.com/PurchaseOrder" elementFormDefault="qualified"> <xsd:element name="PurchaseOrder" type="PurchaseOrderType"/> <xsd:complexType name="PurchaseOrderType"> <xsd:all> <xsd:element name="ShippingInformation" type="InfoType" minOccurs="1" maxOccurs="1"/> <xsd:element name="BillingInformation" type="InfoType" minOccurs="