The UNBOUND attribute specifies that a routine does  not  access
  automatic  variables  outside the scope in which it is declared.
  That is, the bound procedure value of an  unbound  routine  does
  not include the static scope pointer.

  This attribute can be applied to  routines  and  formal  routine
  parameters.

  See the "HP Pascal Language Reference Manual" for  the  complete
  description of using the UNBOUND attribute.