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item 1 # as read from file
    $key =          "k1";
...
    $hash{ $key } = ( { $valname => [ $value, $type, $flag ] });
    
item N  (indeterminate until runtime)

k1  =>
        vname1 => (v1, t1, f1)
...

k3  =>
        vname3 => ( v3, t3, f3 )

foreach $i (keys %hash)
{
...
        print "$content[0] $content[1] $content[2]\n";
    }
}