On 19/03/2012 13:10, Anirban Adhikary wrote:
Hi List,
I have a XML file which looks like as follows
<ISProducts>
<StoreInfo>
<BSC id="AMIBRB1">
<ALPHA>10</ALPHA>
<AMRCSFR3MODE>1,3,4,7</AMRCSFR3MODE>
<AMRCSFR3THR>12,16,21</AMRCSFR3THR>
<AMRCSFR3HYST>2,3,3</AMRCSFR3HYST>
<AMRCSFR4MODE>1,3,6,8</AMRCSFR4MODE>
<AMRCSFR4THR>12,17,25</AMRCSFR4THR>
<PAGBUNDLE>50</PAGBUNDLE>
<USERDATA>AMI_BRANLY_B_1</USERDATA>
</BSC>
.........................
.............................
Now my question is how to extract the value of id in a variable using
XML::Twig.
Since the xml file is quite large I like to print the value of id using a
loop.
XML::Twig uses callbacks to process pieces of the XML that you have
defined. In this case you are interested only in the <BSC> start tag so
you can define a "start tag handler". Using $twig->purge empties the
data read so far. If you use this once you have accessed all the
information you need from a given element there is no need to store the
entire XML data in memory.
The program below doeas what I think you want.
HTH,
Rob
use strict;
use warnings;
use XML::Twig;
my $twig = XML::Twig->new(start_tag_handlers => {
BSC => \&on_BSC
});
sub on_BSC {
my($twig, $bsc)= @_;
print $bsc->id, "\n";
$twig->purge;
}
$twig->parsefile('ISProducts.xml');
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