<section id="regex"><title>Regular Expressions</title>
-<p><module>mod_rewrite</module> uses the <a href="https://www.pcre.org/">Perl Compatible
-Regular Expression</a> vocabulary. In this document, we do not attempt
+<p><module>mod_rewrite</module> uses the <a href="https://www.pcre.org/current/doc/html/pcre2syntax.html">Perl Compatible
+Regular Expressions</a> vocabulary, via the PCRE2 library. In this document, we do not attempt
to provide a detailed reference to regular expressions. For that, we
-recommend the <a href="https://www.pcre.org/pcre.txt">PCRE man pages</a>, the
+recommend the <a href="https://www.pcre.org/current/doc/html/pcre2syntax.html">PCRE2 documentation</a>, the
<a href="https://perldoc.perl.org/perlre">Perl regular
-expression man page</a>, and <a
+expressions man page</a>, and <a
href="https://www.oreilly.com/library/view/mastering-regular-expressions/0596528124/">Mastering
Regular Expressions, by Jeffrey Friedl</a> (the third edition is from
2006, but regular expression syntax is essentially unchanged, and this