[otrs] Notifications (Event) - 'Subject match' regex

Hi All, Is anybody using the 'Subject match' field in the Notifications (Event) ? I'm trying to figure out what kind of regular expressions can I use there. My example: I'm trying to match the following subject in the email we are getting: "Incident *Number* for product *Name* has been updated" I tried ".*Incident.*for product.*has been updated" as well as "*Incident*for product*has been updated" but neither worked. Btw, what kind of regex syntax is used by otrs? -- Thanks a lot, Robert