{
{   The purpose of this request is to produce a display subtitle consisting of
{ a path name prefixed by an identifying header string.
{
{   It should be nested within the main display procedure for the command using
{ it and requires the following decks to be *copy'd into the module in which it
{ is used:  clp$build_path_subtitle, clp$horizontal_tab_display,
{ clp$put_partial_display, clp$trimmed_string_size, and clv$display_variables.
{ It is intended to be called by the put_subtitle procedure used by
{ clp$new_page_procedure.
{
{   After the display has been opened that variable CLV$SUBTITLES_BUILT
{ (declared in deck clv$display_variables) must be initialized to FALSE.
{
{       CLP$PUT_PATH_REFERENCE_SUBTITLE (PATH, HEADER, STATUS)
{
{ PATH: (input)  This parameter specifies the path name to be displayed in the
{       subtitle.
{
{ HEADER: (input)  This parameter specifies the header text to precede the
{       first subtitle line containing the path name.
{
{ STATUS: (output)  This parameter specifies the request status.
{
