Just a side note: I've just checked that it is still a to-be-done-issue (from the docs:

Future releases of the module will also provide patterns for the follo
+wing:

   * email addresses
   * HTML/XML tags
   * more numerical matchers,
   * mail headers (including multiline ones),
   * more URLS
   * telephone numbers of various countries
   * currency (universal 3 letter format, Latin-1, currency names)
   * dates
   * binary formats (e.g. UUencoded, MIMEd)
[download]

)
but it's still worth when working on regexps to throw an eye on Regexp::Common. With a bit of luck, what you need is already done, at highest quality.