🚀 go-pugleaf

Hi,
    I am using CodeGear's XMLSchema.pas classes to parse an xml schema file. 
However, I am having trouble with extensions of complex types.  For example,

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
elementFormDefault="qualified" attributeFormDefault="unqualified">
 <xs:element name="File">
  <xs:complexType>
   <xs:complexContent>
    <xs:extension base="FilePropertiesType">
     <xs:attribute name="Name" type="xs:string" use="required"/>
    </xs:extension>
   </xs:complexContent>
  </xs:complexType>
 </xs:element>
 <xs:complexType name="FilePropertiesType">
  <xs:sequence>
   <xs:element name="Author" type="xs:string" minOccurs="0"/>
  </xs:sequence>
 </xs:complexType>
</xs:schema>

When I parse the File element, I can find out it is using a complex type but 
I cannot find a reference to the FilePropertiesType anywhere under the File 
element!  If I use the code:
          for i := 0 to (XMLDataType as 
IXMLComplexTypeDef).AttributeDefList.Count - 1 do
              Items.Add.LoadSchemaFromXML((XMLDataType as 
IXMLComplexTypeDef).AttributeDefList[i]);
          // Get child elements
          for i := 0 to (XMLDataType as 
IXMLComplexTypeDef).ElementDefList.Count - 1 do
              Items.Add.LoadSchemaFromXML((XMLDataType as 
IXMLComplexTypeDef).ElementDefList[i]);

I can find the Name attribute, but not the Author attribute.  Please help!

Thanks,
Tom