I had a stab at answering when you asked previously. The HTML::Element docs have a lot of examples and there is a good overview in HTML::Tree and HTML::Tree::Scanning.

Have a look at the tutorials that come with Perl:

Update
Added link to HTML::Tree::Scanning which, as kindly pointed out by jdporter, discusses the look_down method.

In reply to Re: HTML::TreeBuilder - Look_Down Function by wfsp
in thread HTML::TreeBuilder - Look_Down Function by jdlev

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