This text file contains sample code fragments from:
Section 23.6 - Partial Validation
Chapter 23 - Advanced Versioning
Book - Web Service Contract Design & Versioning for SOA
Series - The Prentice Hall Service Technology Series from Thomas Erl
Site - www.servicetechbooks.com


<lineItem>
  <productID>AY2345</productID>
  <productName>Service Blaster 2000</productName>
  <available>true</available>
</lineItem>

Example 23.20 - Only the productID element is actually required by the consumer receiving this message.


<lineItem xmlns="http://actioncon.com/schema/po"
  xmlns:po2="...">
  <productID>AY2345</productID>
  <productName>Service Blaster 2000</productName>
  <po2:available>true</po2:available>
</lineItem>

Example 23.21 - The content represented by the po2:available element is not part of the defined set.


<lineItem xmlns="http://actioncon.com/schema/po">
  <productID>AY2345</productID>
  <productName>Service Blaster 2000</productName>
</lineItem>

Example 23.22 - The subset of the previous message (minus the po2:available content) is considered the "projection" of the original message.