I looked in the archives and found a couple of posts that were similar to what I was looking for, but not quite what I needed. I'd love if someone could explain why this works for one, but not the other - First things - Data:

'record' => [
 {
        'xmlns' => 'http://www.loc.gov/MARC21/slim',
        'xmlns:xsi' =>something', 
        'xsi:schemaLocation' => somehtml',
        'datafield' => [ 
                { 
                'ind1' => ' ',
                'ind2' => ' ',
                'subfield' =>     [ 
                    {
                    'content' => '0047-3936', 
                    'code' => 'a' 
                    } 
                                ],
                tag' => '022' 
                }, 
                { 
                'ind1' => '1',
                'ind2' => '0',
                'subfield' =>     [ 
                    {     
                    'content' => 'more content here',
                    'code' => 'a'
                    } 
                        ],
                'tag' => '245' 
                } 
            ] 
        },
repeat this structure entry x10
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So, this is one entry in a list of 10 thats produced - now, if I use this code:

my $xml = new XML::Simple (ForceArray => 1, KeyAttr=>[]);

$data = $xml->XMLin($dirtyxml);

foreach $record(@{$data->{present_response}->{record}})
{
    $gooddata=$record->{xmlns};
    push(@title, $gooddata);
    }

foreach (@title) {
$list = $list."<p>".$_."</p>";
}

my $output = "<p>".$list."</p>";

return($output);
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I can easily pull and display the values of {xmlns} for each entry, but attempting to pull {datafield}->{subfield}->{content} (notice there can be 2 or more per entry), using the same method, I get nothing - eg.

foreach $subfield (@{$data->{present_response}->{record}->{datafield}-
+>{subfield}})
{
    $gooddata=$subfield->{content};
    push(@title, $gooddata);
    }
[download]

any words of wisdom? Thanks!