...
WHAT'S A LINK-type tag
    Take a look at %HTML::LinkExtractor::TAGS to see what I consider to be
    link-type-tag.

    Take a look at @HTML::LinkExtractor::VALID_URL_ATTRIBUTES to see all the
    possible tag attributes which can contain URI's (the links!!)
...

use HTML::LinkExtractor;
use Data::Dumper;
local $Data::Dumper::Indent = 1;
print Dumper( \%HTML::LinkExtractor::TAGS , \@HTML::LinkExtractor::VAL
+ID_URL_ATTRIBUTES );
__END__
$VAR1 = {
  'tr' => [
    'background'
  ],
  'base' => [
    'href'
  ],
  'form' => [
    'action'
  ],
  'body' => [
    'background'
  ],
  'input' => [
    'dynsrc',
    'lowsrc',
    'src'
  ],
  'a' => [
    'href'
  ],
  '!doctype' => [
    'url'
  ],
  'img' => [
    'dynsrc',
    'longdesc',
    'lowsrc',
    'src',
    'usemap'
  ],
  'object' => [
    'archive',
    'classid',
    'code',
    'codebase',
    'data',
    'usemap'
  ],
  'bgsound' => [
    'src'
  ],
  'sound' => [
    'src'
  ],
  'del' => [
    'cite'
  ],
  'script' => [
    'src'
  ],
  'applet' => [
    'archive',
    'code',
    'codebase',
    'src'
  ],
  'embed' => [
    'pluginspage',
    'pluginurl',
    'src'
  ],
  'area' => [
    'href'
  ],
  'iframe' => [
    'src'
  ],
  'ilayer' => [
    'background',
    'src'
  ],
  'td' => [
    'background'
  ],
  'blockquote' => [
    'cite'
  ],
  'q' => [
    'cite'
  ],
  'ins' => [
    'cite'
  ],
  'th' => [
    'background'
  ],
  'layer' => [
    'src'
  ],
  'frame' => [
    'src',
    'longdesc'
  ],
  'meta' => undef,
  'table' => [
    'background'
  ],
  'isindex' => [
    'action'
  ],
  'div' => [
    'src'
  ],
  'link' => [
    'src',
    'href'
  ]
};
$VAR2 = [
  'action',
  'archive',
  'background',
  'cite',
  'classid',
  'code',
  'codebase',
  'data',
  'dynsrc',
  'href',
  'longdesc',
  'lowsrc',
  'pluginspage',
  'pluginurl',
  'src',
  'usemap'
];
[download]