I often use XML::XSH2: 
#!/usr/bin/perl

use XML::XSH2;

xsh << EOX
  open 852913.xml ;
  insert attribute 'Value="API"' into //Parameter[@Name="MapSource"]//
+Item[@Value="NONE"] ;
  save :b ;
EOX

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In reply to Re: How I can change value in XML file ? by choroba
in thread How I can change value in XML file ? by toren

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