What is .tagset?

I can't find any here at all, I imagine it's some 3rd [arty App or Development that is producing them.

Though I do find a few files like...

/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/share/man/man3/HTML::Tagset5.18.3pm

Which has info like this in it...

.IX Title "Tagset 3"

.TH Tagset 3 "2008-02-29" "perl v5.18.2" "User Contributed Perl Documentation"

.\" For nroff, turn off justification. Always turn off hyphenation; it makes

.\" way too many mistakes in technical documents.

.if n .ad l

.nh

.SH "NAME"

HTML::Tagset \- data tables useful in parsing HTML

.SH "VERSION"

.IX Header "VERSION"

Version 3.20

.SH "SYNOPSIS"

.IX Header "SYNOPSIS"

.Vb 3

\& use HTML::Tagset;

\& # Then use any of the items in the HTML::Tagset package

\& # as need arises

.Ve

.SH "DESCRIPTION"

.IX Header "DESCRIPTION"

This module contains several data tables useful in various kinds of

\&\s-1HTML\s0 parsing operations.

perldoc HTML::Tagset

It is a Perl library useful for parsing HTML tags.

Thanks, did see the reference to pearl ! :)