Hi, I have a code below. The __DATA__ contains the two files which is in Standard Intermediate Format and separation of the file is based on control characters at the start. I have to list all the tags which is in the braces and if the same tag exists twice it should not be displayed twice. The code which i have written displays only some of the tags. Please provide me a solutions. How to display all the tags but not repeated. If the tag is present twice within the same file I have to print "The key DATE is multiple" For example, DATE is present twice in the first file. How to print it multiple. 
#!/usr/bin/perl
my %hTmp;
while($_=<DATA>){
if($_ =~ m/\{/){
next if $_ =~ m/^\d+/; #remove empty lines
print $_ unless ($hTmp{$_}++);
}
}

__DATA__
^C^D^V^V^A os01 0002 010101 R S 0012310002 00003466^B{IT}
R
{SOURCETAG}
0012310002
{ACCESSION}
000000
{PUBLICATION}
THE ORLANDO SENTINEL
{EDITION}
METRO
{DATE}
010101
{DATE}
010102
{TDATE}
Monday, January 1, 2001
{SECTION}
SPECIAL SECTION
{PAGE}
E2
{ZONE}
FLORIDA
{KEYWORDS}
VOLUNTEER SUPPORT
{SECTION}
SPECIAL SECTION1
{SEND}
YES
^C^D^V^V^A os01 0003 010101 R S 0012310003 00001558^B{IT}
R
{SOURCETAG}
0012310003
{ACCESSION}
000000
{PUBLICATION}
THE ORLANDO SENTINEL
{HI}hi
{EDITION}
METRO
{DATE}
010101
{TDATE}
Monday, January 1, 2001
{SEND}
YES

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In reply to remove duplicate tags by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
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