Actually, I just realized that if you do go this route you can avoid needing to match twice: 
my @tag_regexes = map { qr/<($_) ?[^>]*>/ } qw/kt bold ital ch\d/;

while (defined (my $line = <DATA>)) {
    die "Invalid element in line #$. ($line). Cannot proceed due to th
+e above error\n"
        unless grep { $line =~ $_ } @tag_regexes;
}

__DATA__
<kt>
<bold>
<ital>
<ch1>
<kt someattribute="somevalue">
<bold someattribute="somevalue">
<ital someattribute="somevalue">
<ch1 someattribute="somevalue">
<foo>

[download]

In reply to Re^2: Matching elements in a array by duckyd
in thread Matching elements in a array by rsriram

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