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<?xml version="1.0" encoding="UTF-8"?>
<book xmlns:book="http://generated.ns/book">  
  <book:chapter id="bk444444ch1" type="CHAPTER"> 
...
    <book:locator xmlns:xlink="http://www.w3.org/1999/xlink" xlink:hre
+f="/book/isbn/979-0-4444-1000-17/book-part/chapter/bk444444ch1?releas
+eStatus=RELEASED&amp;format=epub" xlink:title="Photonic crystal light
+-emitting sources" xlink:type="locator"></book:locator>
  </book:chapter> 
</book>

$ xmllint.exe --shell ravi06-03.xml
/ >
/ > whereis //@xlink:href
...
/ > bye

$