+.P
+The value
+.I $local
+can be used instead of a specific username. In that case, udev will determine
+the current local user at the time of device node creation and substitute
+that username as the owner of the new device node. This is useful, for
+example, to let hot-plugged devices, such as cameras, be owned by the user at
+the current console. Note that if no user is currently logged in, or if udev
+otherwise fails to determine a current user, the
+.I default_owner
+value is used in lieu.
+.P
+A number of different fields in the above configuration files support a simple
+form of shell style pattern matching. It supports the following pattern characters:
+.TP
+.B *
+Matches zero, one, or more characters.
+.TP
+.B ?
+Matches any single character, but does not match zero characters.
+.TP
+.B [ ]
+Matches any single character specified within the brackets. For example, the
+pattern string "tty[SR]" would match either "ttyS" or "ttyR". Ranges are also
+supported within this match with the '\-' character. For example, to match on
+the range of all digits, the pattern [0\-9] would be used. If the first character
+following the '[' is a '!', any character not enclosed is matched.