Hi all. I have this xml file :- http://www.genome.jp/kegg-bin/download?entry=pon01100&format=kgml

I even tried parsing it with XML:Simple as :-

use strict;
use XML::Simple;
use Data::Dumper;

my $xml_hash = XMLin('pon01100.xml');
print Dumper($xml_hash);

[download]

Its dumping the output as desired to the console. 

$VAR1 = {
          'reaction' => {
                        'rn:R07892' => {
                                       'substrate' => {
                                                      'name' => 'cpd:C
+16331',
                                                      'id' => '3038'
                                                    },
                                       'type' => 'reversible',
                                       'id' => '983',
                                       'product' => {
                                                    'name' => 'cpd:C16
+332',
                                                    'id' => '2201'
                                                  }
                                     },
                        'rn:R02687' => {
                                       'substrate' => {
                                                      'name' => 'cpd:C
+00641',
                                                      'id' => '3607'
                                                    },
                                       'type' => 'reversible',
                                       'id' => '3606',
                                       'product' => {
                                                    'name' => 'cpd:C01
+885',
                                                    'id' => '3608'
                                                  }
                                     },
                        'rn:R05640' => {
                                       'substrate' => {
                                                      'name' => 'cpd:C
+01724',
                                                      'id' => '2269'
                                                    },
                                       'type' => 'reversible',
                                       'id' => '651',
                                       'product' => {
                                                    'name' => 'cpd:C11
+455',
                                                    'id' => '2270'
                                                  }
                                     }......and so on......

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What I want to do is for each of reactions (named rn:....) I want the substrate "id" and its corresponding all product "id". There could be cases when there would be two or more products for a substrate. For each of the reactions ,I want to save "substrate id" and all its corresponding "product id". Please help

In reply to Parsing an XML file by zing

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