my $records_data = $ref->{'records'}->[0]->{'record'}->...

# or shorter
my $records_data = $ref->{'records'}[0]{'record'}...

##</code><code>##

$pseudohash = [ { key => 5 } ];

##</code><code>##

$pseudohash->{key} = 42;

##</code><code>##

$VAR1 = [
          {
            'key' => 5
          },
          undef,
          undef,
          undef,
          undef,
          42
        ];

##</code><code>##

my $data = { 'records' => [
               {
                 'record' => [
                   {
                     'recordPosition' => [ '1' ],
                   },
                   ],
               },
               ],
           };

##</code><code>##

my $records_data = $ref->{'records'}->{'record'}->{'recordData'}