Purchase Order Schema with Target Namespace, po1.xsd: 
----------------------------------------------------

<schema xmlns="http://www.w3.org/2001/XMLSchema"
        xmlns:po="http://www.example.com/PO1"
        targetNamespace="http://www.example.com/PO1"
        elementFormDefault="unqualified"
        attributeFormDefault="unqualified">

 <element name="purchaseOrder" type="po:PurchaseOrderType"/>
 <element name="comment"       type="string"/>

 <complexType name="PurchaseOrderType">
  <sequence>
   <element name="shipTo"    type="po:USAddress"/>
   <element name="billTo"    type="po:USAddress"/>
   <element ref="po:comment" minOccurs="0"/>
   <!-- etc. -->
  </sequence>
  <!-- etc. -->
 </complexType>

 <complexType name="USAddress">
  <sequence>
   <element name="name"   type="string"/>
   <element name="street" type="string"/>
   <!-- etc. -->
  </sequence>
 </complexType>

 <!-- etc. -->

</schema>

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A Purchase Order with Unqualified Locals, po1.xml:
--------------------------------------------------

<?xml version="1.0"?>
<apo:purchaseOrder xmlns:apo="http://www.example.com/PO1"
                   orderDate="1999-10-20">
    <shipTo country="US">
        <name>Alice Smith</name>
        <street>123 Maple Street</street>
        <!-- etc. -->
    </shipTo>
    <billTo country="US">
        <name>Robert Smith</name>
        <street>8 Oak Avenue</street>
        <!-- etc. -->
    </billTo>
    <apo:comment>Hurry, my lawn is going wild!</apo:comment>
    <!-- etc. -->
</apo:purchaseOrder>


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Modifications to po1.xsd for Qualified Locals:
---------------------------------------------

<schema xmlns="http://www.w3.org/2001/XMLSchema"
        xmlns:po="http://www.example.com/PO1"
        targetNamespace="http://www.example.com/PO1"
        elementFormDefault="qualified"
        attributeFormDefault="unqualified">

 <element name="purchaseOrder" type="po:PurchaseOrderType"/>
 <element name="comment"       type="string"/>

 <complexType name="PurchaseOrderType">
  <!-- etc. -->
 </complexType>

 <!-- etc. -->

</schema>

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A Purchase Order with Explicitly Qualified Locals:
-------------------------------------------------

<?xml version="1.0"?>
<apo:purchaseOrder xmlns:apo="http://www.example.com/PO1"
                   orderDate="1999-10-20">
    <apo:shipTo country="US">
        <apo:name>Alice Smith</apo:name>
        <apo:street>123 Maple Street</apo:street>
        <!-- etc. -->
    </apo:shipTo>
    <apo:billTo country="US">
        <apo:name>Robert Smith</apo:name>
        <apo:street>8 Oak Avenue</apo:street>
        <!-- etc. -->
    </apo:billTo>
    <apo:comment>Hurry, my lawn is going wild!</apo:comment>
    <!-- etc. -->
</apo:purchaseOrder>


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A Purchase Order with Default Qualified Locals, po2.xml:
-------------------------------------------------------

<?xml version="1.0"?>
<purchaseOrder xmlns="http://www.example.com/PO1"
               orderDate="1999-10-20">
    <shipTo country="US">
        <name>Alice Smith</name>
        <street>123 Maple Street</street>
        <!-- etc. -->
    </shipTo>
    <billTo country="US">
        <name>Robert Smith</name>
        <street>8 Oak Avenue</street>
        <!-- etc. -->
    </billTo>
    <comment>Hurry, my lawn is going wild!</comment>
    <!-- etc. -->
</purchaseOrder>

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