"I have no idea about what lemur is..."

Please see Lemur as well as The Lemur Project ;-)

Best regards, Karl

Thank you, Karl. I actually knew what lemurs were (the animals), but had not idea about what the Lemur Project was.

karlgoethebier has cleared things up a little bit, but I still don't understand the Perl question implicit in nimpoura's OP.

Actually, I, too, have a problem that is really urgent! I would like to live a good life! I am working with the crappy life I currently live. Thank you in advance for any advice!

#!/usr/bin/perl
use strict;
use warnings;

for(my $i=351; $i<400; $i++){
my $filename = '/home/nikol123/indri-5.6/runquery/trec7_4collections.t
+xt';
open(my $file, '<', $filename) or die "open: $!";

while ( <$file> )
{
my @lines = split(/\n/, $filename);
foreach my $line (@lines) { 
 if ($line = '<query> <type>indri</type> <number>$i</number> <text>"_"
+</text> </query>')
{ 
my $param = "<parameters>
<index>/home/nikol123/indri-5.6/4collections</index>
print $line;
<fbDocs>10</fbDocs>
</parameters>";
print $param;
}}}}
[download]

<parameters>
<index>/home/nikol123/indri-5.6/4collections</index>
print <query> <type>indri</type> <number>$i</number> <text>"_"</text> 
+</query>;
<fbDocs>10</fbDocs>
</parameters>
[download]

<parameters>
<index>/home/nikol123/indri-5.6/4collections</index>
<query> <type>indri</type> <number>351</number> <text>Falkland petrole
+um exploration</text> </query>;
<fbDocs>10</fbDocs>
</parameters>
[download]

Consider using an XML parser. eg XML:Twig.

#!perl
use strict;
use warnings;
use XML::Twig;
my $filename = 'trec7_4collections.txt';

our $num;
my $fh;
for $num (351..354){
  open $fh,'>',$num.'.xml' or die "$!";
  my $twig = XML::Twig->new(
    twig_handlers => { query => \&query },
    pretty_print=>'indented'
  );
  $twig->parsefile($filename);
  $twig->flush($fh);
  print "Created $num.xml\n";
} 

sub query { 
  my( $twig, $e) = @_;
  my $n = $e->first_child_text('number');
  $e->cut if ($n ne $num);
}
[download]

poj