'{<([^>\s|]+)[\s|]([^>]+)>}' => '<a href="$1">$2</a>', # hyperlink
"/\r\n?/" => "\n", # unix newlines
"/ +\n/" => "<br />", # trailing spaces for hard line break
+ '{^(/data/.*\.jpe?g)\z}m' => '<img src="/thumb/640x/\1" />', # image reference
"/^[-*] (.*)$\n?/m" => '<li>$1</li>', # list item
"/^(.+)$\n?/m" => "<p>$1</p>\n", # paragraph
"{^<p>(<li>.*</li>)(?:</p>\n)?}m" => "<ul>$1</ul>\n", # list container