A bit more information would be helpful.

Under what circumstances are you trying to find ill-formatted HTML tags?

I ask because one case that occurs to me is a situation where you are building or proof-reading raw html on a local machine. If so, using the w3c validator will be easy, free and produce up-to-date results.

Using Perl to use the w3c validator will be more complex (in that case), but it's doable. Write your script to

  1. read your html file into local memory
  2. connect to w3c, send the html page (won't work if merely a fragment, IIRC) to the validator (it accepts a URI, file upload or direct input (cut'n'paste), and capture the return (with one of the usual suspects - search the Monastery for 'web scraping' for one set of ideas).
  3. display the returned errors, warnings, or 'good to go' message for the user or spit'em out to dead trees or whatever.

At a minimum, you can expect standard-based validation this way; Tidy has it's own (configurable within limits) set of notions about valid .html and, as noted above, HTML::Validator may have some outdated notions.

In reply to Re: Modules or rules to find ill-formatted HTML by ww
in thread Modules or rules to find ill-formatted HTML by lihao

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