Blog Post : Using XmlSerializer with external serializable types
Listing 2 : Base and external XML data sample
  1. <?xml version="1.0" encoding="utf-8"?>  
  2. <ExtensibleData xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance xmlns:xsd="http://www.w3.org/2001/XMLSchema" ID="001" xsi:noNamespaceSchemaLocation="ExtData.xsd">  
  3.     <Name>XML-FX.COM</Name>  
  4.     <Description>XML information website</Description>  
  5.     <ExternData type="WebsiteData.Website, WebsiteData, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">  
  6.         <Website Url="http://xml-fx.com">  
  7.             <Contact>Joe Bloggs</Contact>  
  8.             <Email>info@xml-fx.com</Email>  
  9.         </Website>  
  10.     </ExternData>  
  11. </ExtensibleData>