[xml] XML schema support

["Robin Ehrlich" <REhrlich ubiqinc com>]

I am trying to get my application to use schema validation and as a test I
used "testSchemas" against a simple XML file, but I get all sorts of errors.
Is basic schema support available in v2.5.4?

**** Here is my schema:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
targetNamespace="http://tempuri.org/po.xsd";
xmlns="http:tempuri.org/po.xsd" elementFormDefault="qualified">
 <xs:annotation>
  <xs:documentation xml:lang="en">
   Purchase order schema for Example.com.
   Copyright 2000 Example.com. All rights reserved.
  </xs:documentation>
 </xs:annotation>

 <xs:element name="purchaseOrder" type="PurchaseOrderType"/>

 <xs:element name="comment" type="xs:string"/>

 <xs:complexType name="PurchaseOrderType">
  <xs:sequence>
   <xs:element name="shipTo" type="USAddress"/>
   <xs:element name="billTo" type="USAddress"/>
   <xs:element ref="comment" minOccurs="0"/>
   <xs:element name="items"  type="Items"/>
  </xs:sequence>
  <xs:attribute name="orderDate" type="xs:date"/>
 </xs:complexType>

 <xs:complexType name="USAddress">
  <xs:sequence>
   <xs:element name="name"   type="xs:string"/>
   <xs:element name="street" type="xs:string"/>
   <xs:element name="city"   type="xs:string"/>
   <xs:element name="state"  type="xs:string"/>
   <xs:element name="zip"    type="xs:decimal"/>
  </xs:sequence>
  <xs:attribute name="country" type="xs:NMTOKEN"
     fixed="US"/>
 </xs:complexType>

 <xs:complexType name="Items">
  <xs:sequence>
   <xs:element name="item" minOccurs="0" maxOccurs="unbounded">
    <xs:complexType>
     <xs:sequence>
      <xs:element name="productName" type="xs:string"/>
      <xs:element name="quantity">
       <xs:simpleType>
        <xs:restriction base="xs:positiveInteger">
         <xs:maxExclusive value="100"/>
        </xs:restriction>
       </xs:simpleType>
      </xs:element>
      <xs:element name="USPrice"    type="xs:decimal"/>
      <xs:element ref="comment"   minOccurs="0"/>
      <xs:element name="shipDate" type="xs:date" minOccurs="0"/>
     </xs:sequence>
     <xs:attribute name="partNum" type="SKU" use="required"/>
    </xs:complexType>
   </xs:element>
  </xs:sequence>
 </xs:complexType>

 <!-- Stock Keeping Unit, a code for identifying products -->
 <xs:simpleType name="SKU">
  <xs:restriction base="xs:string">
   <xs:pattern value="\d{3}-[A-Z]{2}"/>
  </xs:restriction>
 </xs:simpleType>

</xs:schema>

*** and the XML:

<?xml version="1.0"?>
<purchaseOrder xmlns="http://tempuri.org/po.xsd"; orderDate="1999-10-20">
    <shipTo country="US">
        <name>Alice Smith</name>
        <street>123 Maple Street</street>
        <city>Mill Valley</city>
        <state>CA</state>
        <zip>90952</zip>
    </shipTo>
    <billTo country="US">
        <name>Robert Smith</name>
        <street>8 Oak Avenue</street>
        <city>Old Town</city>
        <state>PA</state>
        <zip>95819</zip>
    </billTo>
    <comment>Hurry, my lawn is going wild!</comment>
    <items>
        <item partNum="872-AA">
            <productName>Lawnmower</productName>
            <quantity>1</quantity>
            <USPrice>148.95</USPrice>
            <comment>Confirm this is electric</comment>
        </item>
        <item partNum="926-AA">
            <productName>Baby Monitor</productName>
            <quantity>1</quantity>
            <USPrice>39.98</USPrice>
            <shipDate>1999-05-21</shipDate>
        </item>
    </items>
</purchaseOrder>

*** and finally the errors from testSchema (v2.5.4)

C:\TEMP>e:testSchemas po.xsd po.xml
Unable to lookup type USAddressSchemas: element shipTo type USAddress not
found
Unable to lookup type USAddressSchemas: element billTo type USAddress not
found
Schemas: element anonelem2 ref to comment not found
Unable to lookup type ItemsSchemas: element items type Items not found
Schemas: element anonelem9 ref to comment not found
Unable to lookup type PurchaseOrderTypeSchemas: element purchaseOrder type
Purch
aseOrderType not found
Type of sequence 1 : po.xsd:15 :elements
Type of sequence 4 : po.xsd:37 :elements
Type of sequence 3 : po.xsd:25 :elements
Type of sequence 1 : po.xsd:15 :elements
Type of PurchaseOrderType : po.xsd:14 :elements
Type of simpletype7 : po.xsd:43 :simple
Type of sequence 3 : po.xsd:25 :elements
Type of USAddress : po.xsd:24 :elements
Type of restriction 8 : po.xsd:44 :empty
Type of sequence 4 : po.xsd:37 :elements
Type of Items : po.xsd:36 :elements
Type of sequence 6 : po.xsd:40 :elements
Type of anontype5 : po.xsd:39 :elements
Type of sequence 6 : po.xsd:40 :elements
Type of restriction 10 : po.xsd:61 :empty
Type of SKU : po.xsd:60 :simple
Building content model for item
Unable to lookup type SKUSchemas: attribute partNum type SKU not found
Element purchaseOrder has no type
po.xml fails to validate

Thanks for any help,
Robin