foo: index.html,5,18;
bar: index.html,6;page1.html,1;
baz: index.html,7;

##</code><code>##

$seq{'foo'}{'index.html'} = [5,18];
$seq{'bar'}{'index.html'} = [6];
$seq{'bar'}{'page1.html'} = [1];
$seq{'baz'}{'index.html'} = [7];