As I understand the question, it is how to store the regular expression in a variable (and use them later.)

Here is a quick example which uses a "junk" Apache log and IIS log (they each contain but three fields -- a number, a file, and a date.) You can work out the expressions for the real logs. *Smiles*

use strict;

#-- Define variables
my $mDate;
my $mDoc;
my $mFile;
my $mNumber;
my $mSystem = 'apache';

my @mDocuments = 
  (
    'report.html',
    'secret.html'
  );

my %mLogExpr = 
  (
    apache  => '^(\d+)\s*(\S+)\s*(\S+)$',
    iis     => '^(\S+)\s*(\S+)\s*(\d+)$'
  );
my %mTotalDocs;


#-- Initialize accumulators
foreach (@mDocuments)
{
  $mTotalDocs{$_} = 0;
}


#-- Process the information
while (<DATA>)
{

  #-- Parse line and skip non-matching ones
  next if ! /$mLogExpr{$mSystem}/;

  #-- Store the parsed values
  if ($mSystem eq 'apache')
  {
    ($mNumber, $mFile, $mDate)=($1,$2,$3);
  }
  else
  {
    ($mFile, $mDate, $mNumber)=($1,$2,$3);
  }

  #-- Since I am not doing anything with the information, 
  #-- I am going to print it. *Smiles*
  print "Number:\t", $mNumber, "\n";
  print "File:\t", $mFile, "\n";
  print "Date:\t", $mDate, "\n";
  print "\n";

  #-- Check for documents
  foreach $mDoc (@mDocuments)
  {
    $mTotalDocs{$mDoc}++ if /$mDoc/;
  }
}


#-- Print the results
foreach (@mDocuments)
{
  print "Total for $_: $mTotalDocs{$_}\n";
}


__DATA__
#Apache Log
123    report.html    2001-09-16
123    report.html    2001-09-17
234    nothing.html    2001-09-18
123    report.html    2001-09-18
345    secret.html    2001-09-19
567    stuff.html    2001-09-20

# IIS log
report.html    2001-09-16    123
report.html    2001-09-17    123
nothing.html    2001-09-18    234
report.html    2001-09-18    123
secret.html    2001-09-19    345
stuff.html    2001-09-20    567
[download]

You can switch the log back and forth (between apache and iis) by changing the one $mSystem variable.

Does this help?

Update

I forgot to mention this the first time, but I also noticed a couple of other things in your example:

• The '/' is included within the expression string
• When building an expression string, ' is better than " to make sure characters are not evaluated
• The information for a line is only being saved if the line matched /$document/... when /$document2/ matches, the OLD information will be printed to the report

Update #2

I need to start using next unless instead of next if ! *Grins*

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