\ban ASCII word boundary
\w+any word character, repeated at least once
?matches at most one character from the set below:
-the literal - (4510 / 558 / 2D16)
.the literal . (4610 / 568 / 2E16)
_the literal _ (9510 / 1378 / 5F16)
\w+any word character, repeated at least once
@the literal @ (6410 / 1008 / 4016)
\w+any word character, repeated at least once
\.the literal . (4610 / 568 / 2E16)
Character Class[a-z]{2,3}+ {2,3}+matches between 2 and 3 characters from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
g modifier: global. Finds all matches instead of stopping after the first