Hi,
could this be what you want ?
# cat re1
use warnings;
use strict;
undef $/;
my $tout = <DATA>;
my $z;
while ($tout =~ /((?:DES|TN).+?(DATE|ZONE)[^\n]+\n\s*\n)/sg) {
print "\n\n", ++$z, ":\n", $1;
}
__DATA__
DES MAIL
TN 001 0 02 00
TYPE SL1
CDEN DD
CUST 0
KLS 1
FDN
TGAR 0
LDN NO
NCOS 0
09
DATE 9 MAR 2000
TN 001 0 02 01
05 RLS
06 TRN
07 AO3
08
09
ZONE 002
TN 001 0 02 01
05 RLS
ZONE 001
07 AO3
08
09
DATE 9 MAR 2000
output
# perl -w ./re1
1:
DES MAIL
TN 001 0 02 00
TYPE SL1
CDEN DD
CUST 0
KLS 1
FDN
TGAR 0
LDN NO
NCOS 0
09
DATE 9 MAR 2000
2:
TN 001 0 02 01
05 RLS
06 TRN
07 AO3
08
09
ZONE 002
3:
TN 001 0 02 01
05 RLS
ZONE 001
07 AO3
08
09
DATE 9 MAR 2000
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