XPathing Up level

mr_p has asked for the wisdom of the Perl Monks concerning the following question:

Hello Monks,

I am in need of your help again. All the help is apprecicated.

I am tring to traverse an xml get values from it. The program is suppose to parse 'Country' and 'WID'attribute value. The output should look like the below:

USA|1
UK|1
CANADA|1
MEXICO|2
INDIA|2
CHINA|2
[download]

but the problem is I am not able to pullout WID value so my out put is incorrect. What am I doing wrong? Please help

#!/usr/bin/perl

my $xml_str1 = '<List>
    <Events WID="1">
        <Event Confirmed="Y">
            <Country>USA</Country>
        </Event>
        <Event Confirmed="Y">
            <Country>UK</Country>
        </Event>
        <Event Confirmed="Y">
            <Country>CANADA</Country>
        </Event>
    </Events>
    <Events WID="2">
        <Event Confirmed="Y">
            <Country>MEXICO</Country>
        </Event>
        <Event Confirmed="Y">
            <Country>INDIA</Country>
        </Event>
        <Event Confirmed="Y">
            <Country>CHINA</Country>
        </Event>
    </Events>
</List>';


parse_xml($xml_str1);


sub parse_xml
{
    use XML::LibXML;
    no warnings;
    my $Country = ();
    my @List = ();

    my $parser = XML::LibXML->new();
    my $doc    = $parser->parse_string($_[0]);

    foreach my $ca_isins ($doc->findnodes('/List//Events/Event'))
    {
    
        my ($titleCountry) = $ca_isins->findnodes('./Country');
        $Country = $titleCountry->to_literal . "\n";

        my ($widValue) = $ca_isins->findvalue('../../@Wid');

        $Country = $titleCountry->to_literal . "|" . $widValue . "\n";
        push (@List, $Country);

    }

    print "@List";
}
[download]

Comment on XPathing Up level Select or Download Code

Replies are listed 'Best First'.
Re: XPathing Up level by Anonymous Monk on Dec 03, 2010 at 02:35 UTC
XML::XPath - node-to-xpath reverse lookup	[reply]
Re^2: XPathing Up level by yuvanbala (Initiate) on Dec 03, 2010 at 06:43 UTC
Hi, try this code for your search my $xml_str = '<List> <Events WID="1"> <Event Confirmed="Y"> <Country>USA</Country> </Event> <Event Confirmed="Y"> <Country>UK</Country> </Event> <Event Confirmed="Y"> <Country>CANADA</Country> </Event> </Events> <Events WID="2"> <Event Confirmed="Y"> <Country>MEXICO</Country> </Event> <Event Confirmed="Y"> <Country>INDIA</Country> </Event> <Event Confirmed="Y"> <Country>CHINA</Country> </Event> </Events> </List>'; parse_xml($xml_str); sub parse_xml { use XML::LibXML; no warnings; my $Country = (); my @List = (); my $parser = XML::LibXML->new(); my $doc = $parser->parse_string($_[0]); foreach my $ca_isins ($doc->findnodes('/List/Events')) { my ($id) = $ca_isins->findnodes('@WID'); $widValue=$id->to_literal; my (@titleCountry) = $ca_isins->findnodes('./Event//Country'); + foreach (@titleCountry){ push (@List, ($_->to_literal, '\|', $widValue, "\n")); } } print "@List"; } [download] Thanks and Regards, yuvanbala	[reply] [d/l]
Re^3: XPathing Up level by mr_p (Scribe) on Dec 04, 2010 at 05:52 UTC
Thanks so much. That worked perfectly. One more question? why is it ./Event//Country and not ./Event/Country, with single /?	[reply]
Re^4: XPathing Up level by ikegami (Patriarch) on Dec 04, 2010 at 08:22 UTC
Re^3: XPathing Up level by Anonymous Monk on Dec 03, 2010 at 07:24 UTC
I am not mr_p	[reply]
Re: XPathing Up level by choroba (Cardinal) on Dec 03, 2010 at 15:06 UTC
Using XML::XSH2, you can just write `open 875032.xml ; for /List/Events/Event/Country echo :s (.) '\|' ../../@WID ;` [download]	[reply] [d/l]
Re: XPathing Up level by ikegami (Patriarch) on Dec 03, 2010 at 16:50 UTC
`'../../@Wid'` should be `'../@Wid'` as `Events` is the direct parent of `Event`. That said, I would use the same nested loop approach as yuvanbala.	[reply] [d/l] [select]