How can you use Perl to validate if a tagged PDF file is PDF/UA compliant?

To validate if a tagged PDF file is PDF/UA compliant using Perl, you can utilize the PDF::API2 and PDF::PDFA modules. Here is a sample Perl code snippet to achieve this validation:

```perl
use warnings;
use PDF::API2;
use PDF::PDFA;

my $pdf_file = 'sample.pdf';

my $pdf = PDF::API2->open($pdf_file);
my $pdfa = PDF::PDFA->new($pdf);

if ($pdfa->validate_pdfua()) {
print "The tagged PDF file is PDF/UA compliant.n";
} else {
print "The tagged PDF file is not PDF/UA compliant.n";
}
```

This code snippet opens the PDF file with the PDF::API2 module and then uses the PDF::PDFA module to validate if the PDF file is PDF/UA compliant. The `validate_pdfua()` function returns true if the file is compliant and false if it is not.

Ensure that you have installed the PDF::API2 and PDF::PDFA modules before running this code. Run the code by providing the path to the tagged PDF file that you want to validate.