<?xml version="1.0" encoding="UTF-8"?>
<book xmlns:deltaxml="http://www.deltaxml.com/ns/well-formed-delta-v1"> 
  <p deltaxml:key="P1">The first advantage of DeltaXML is ..</p> 
  <p deltaxml:key="P2">The second advantage of DeltaXML is ..</p> 
</book>
