<Properties location="SomeCountry"/>
    <!--                              ^   -->
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Then, the correct XPath expression to use is

//City[@name=$current_city]/StreetList/Street[@bars!='none']/@name
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Tested in XML::XSH2 (after wrapping the fixed XML chunk into a Cities element), a wrapper around XML::LibXML:

open cities.xml ;
my $current_city = 'Some City' ;
echo //City[@name=$current_city]/StreetList/Street[@bars!='none']/@nam
+e ;
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Update: The same thing using XML::LibXML:

#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

use XML::LibXML;

# Only needed if the city name can contain a double quote. Tested with
+ "Some" City".
sub quote {
    my $string = shift;
    if ($string =~ /"/) {
        my @substrings = split /"/, $string, -1;
        $string = 'concat("' . join(q(", '"', "), @substrings) . '")';
    } else {
        substr $string, $_, 0, '"' for 0, -1;
    }
    return $string
}


my $current_city = 'Some City';

my $dom = 'XML::LibXML'->load_xml( location => shift );

my $quoted_city = quote($current_city);
my @streets = $dom->findnodes('//City[@name=' . $quoted_city . ']/Stre
+etList/Street[@bars!="none"]');
say for map $_->findvalue('@name'), @streets;
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($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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