& @infilter
 
  Syntax: @infilter <object> = <pattern>[, <pattern>...]
  Attribute: Infilter
 
  This attribute specifies a series of patterns to be used to suppress
  text normally sent to the contents of <object> by @listen.  If the
  desired pattern contains a comma, the pattern may be enclosed in 
  curly braces {}.
 
  Example:
    > @listen sports car=*
    > @fo test=enter sports car
    test has left.
    test> Sports Car(#383Q)
    > :waves.
    test> Wizard waves.
    Wizard waves.
    > @infilter sports = *waves*
    > :waves.
    Wizard waves.
    > :knocks on the window.
    test> Wizard knocks on the window.
    Wizard knocks on the window.
 
  See also:  @filter, @inprefix, @listen, @prefix