The main documentation of the Set_Version_Multi_Mesh Procedure contains additional explanation of this code listing.
subroutine Set_Version_Multi_Mesh (Mesh, Version) ! Input variable. type(integer), intent(in) :: Version ! Version number. ! Input/Output variable. type(Multi_Mesh_type), intent(inout) :: Mesh ! Variable to be set. !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ! Verify requirements. VERIFY(Valid_State(Mesh),5) ! Mesh is valid. ! Set the value. Mesh%Version = Version ! Verify guarantees - none. return end subroutine Set_Version_Multi_Mesh