Check out some of the XML tutorials online for explanations of attributes. Here are some examples of accessing attributes.

• https://metacpan.org/pod/distribution/XML-LibXML/LibXML.pod
• https://grantm.github.io/perl-libxml-by-example/basics.html
• https://metacpan.org/pod/distribution/XML-LibXML/lib/XML/LibXML/Element.pod
• https://metacpan.org/pod/distribution/XML-LibXML/lib/XML/LibXML/Node.pod

use warnings;
use strict;
use XML::LibXML;

### https://metacpan.org/pod/distribution/XML-LibXML/LibXML.pod
### https://grantm.github.io/perl-libxml-by-example/basics.html
### https://metacpan.org/pod/distribution/XML-LibXML/lib/XML/LibXML/El
+ement.pod
### https://metacpan.org/pod/distribution/XML-LibXML/lib/XML/LibXML/No
+de.pod

my $dom = XML::LibXML->load_xml(string => <<'EOT');
<test>
  <result_summary total_records="594" total_pages="3" current_page="1"
+ records_this_page="250" download_key="xmxnxnxnxnxnxnxnxnx" time_star
+t="2020-02-19 15:50:55" feed_version="1.44" />
</test>
EOT

### get individual attribute by name:
print "\n******* get individual attribute by name: ***********\n";
foreach my $attribute( $dom->findnodes('/test/result_summary/@total_pa
+ges') ) {
    print "total_pages = ", $attribute->to_literal, "\n";
}

### get individual as hash refs:
print "\n******* get individual attribute as hash refs: ***********\n"
+;
foreach my $result_sum ( $dom->findnodes('/test/result_summary') ) {
    print "total_pages = ", $result_sum->{total_pages}, "\n";
}

### get all attributes:
print "\n******* get all attributes: ***********\n";
foreach my $attribute( $dom->findnodes('/test/result_summary/@*') ) {
    print $attribute->nodeName, " = ", $attribute->to_literal, "\n";
}
[download]

Output:

******* get individual attribute by name: ***********
total_pages = 3

******* get individual attribute as hash refs: ***********
total_pages = 3

******* get all attributes: ***********
total_records = 594
total_pages = 3
current_page = 1
records_this_page = 250
download_key = xmxnxnxnxnxnxnxnxnx
time_start = 2020-02-19 15:50:55
feed_version = 1.44
[download]