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BooleanFilter : X3DChildNode {
  SFBool [in]     set_boolean
  SFNode [in,out] metadata    NULL [X3DMetadataObject]
  SFBool [out]    inputFalse
  SFBool [out]    inputNegate
  SFBool [out]    inputTrue

BooleanFilter filters boolean events, allowing for selective routing of TRUE or FALSE values and negation.

When the set_boolean event is received, the BooleanFilter node generates two events: either inputTrue or inputFalse, based on the boolean value received; and inputNegate, which contains the negation of the value received.