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<file>
...
...
</file>

my $nodeset = $xpath->find('//file/userprop/nameprop');
...
$valu_node = $xpath->find('../valueprop',$node)->get_node(1);

<userprop name="Version">v1.3</userprop>

my $nodeset = $xpath->find('//file/userprop/[@name='v1.3]');