Supports regular expressions matching, complete with group capturing.
Also has standards-compliant HTML parsing, matching of html elements with CSS selectors syntax, and sanitization of untrusted HTML documents.
Tweaked the "RegexCaptureAll" action to include a "Groups" attribute for every match, allowing to see the content of each named group within the match.
Note: Since the output structure of the "RegexCaptureAll" action was changed, you will now need to refresh and update your references to its results (e.g. change "RegexMatchAll.MatchedTextList.Current.Text" to "RegexMatchAll.MatchedTextList.Current.RegexCaptureGroup.Text").