I don't quite get what you want, I do especially not know where you get that default-id of 0x10009 from, but this might (or might not) get you started: 
#!perl -w
use strict;

use Data::Dumper;

my @fields = qw/attr-name mtype attr-id default-id/;

chomp(my @data = <DATA>);

my (@parsed_data, %temp_hash, %data_hash);

while (@data >= @fields) {
   @temp_hash{@fields} = splice @data, 0, @fields;
   push @parsed_data, { %temp_hash };
}

for (@parsed_data) {
   if ($_->{mtype}) {
      $data_hash{$_->{'mtype'}}     
      = { VALUE => $_->{'attr-id'},   TYPE => 'attr-id' };
   } else {
      $data_hash{$_->{'default-id'}} 
      = { VALUE => $_->{'attr-name'}, TYPE => 'attr-name' };
   }
}

print Dumper \%data_hash;

__DATA__
model_name
0x234567
0x654321
0x654321
security_string


0x123456

[download]

Hope this helped.
CombatSquirrel.
Entropy is the tendency of everything going to hell.

In reply to Re: Data structure advice needed by CombatSquirrel
in thread Data structure advice needed by Anonymous Monk

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