An alternative to HTML::Tagset
HTML::Tagset is a popular module on CPAN and has nearly nine thousand descendants in the "River of CPAN". Unfortunately its last version was in March 2008, nearly ten years ago, so it doesn't feature the HTML5 tags yet. There has been some discussion on the HTML tag set bug tracker but so far that has not come to fruition. As an alternative to HTML::Tagset, I made the module HTML::Valid::Tagset, which incorporates the data tables of the "Tidy HTML5" project.
It's partly based on HTML::Tagset's interface, so it can substitute for some of that module's functionality, and it also has specific tag sets for each version of HTML, including HTML5.
Having the Tidy HTML5 data tables means I was also able to add a function
attributes which returns a list of valid attributes for a tag, and
tag_attr_ok, which returns true or false depending on whether a particular tag can take a particular attribute. This is part of a larger distribution called HTML::Valid, based on the Tidy HTML5 project.
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