AEM - dispatcher filter for allowing DAM images with dots

/wildcardselectors  { /type "deny" /url "/content*" /selectors "*" }

hi folks,

what additional publisher rules filters should I add to allow DAM images with dots in them i.e.     blah blah .something.2000X3000.jpg

or is this disapproved of?

Maybe

/wildcardselectorsdam { /type "allow"  /url  "/content/dam*" /selectors "*"   ?

thanks

Fiona