Each line in the bruxpat file consists of a control field and a pattern. The pattern is separated from the control field by a space or tab (whitespace). The include/exclude patterns can be specified as shell wildcard expressions or as regular expressions (as used by commands like grep and sed). Lines beginning with the ‘#’ character are treated as comments.
The control field consists of two characters. The first character specifies the type of action, the second specifies the type of pattern. The control field characters are described below: