
{
{     The purpose of the request is to obtain the data length (number of bytes)
{  of application's message buffer and the UPPERBOUND necessary to ALLOCATE OR
{  PUSH the data description which will describe the application's message
{  buffer.
{
{       NLP$AL_GET_DATA_REQUIREMENTS (DATA, DATA_LENGTH, DESCRIPTION_UPPERBOUND)
{
{  DATA: (input) This parameter specifies the application's message buffer.
{
{  DATA_LENGTH: (output) This parameter specifies the number of bytes in the
{       application's message buffer.
{
{  DESCRIPTION_UPPERBOUND: (output) This parameter specifies the upperbound of
{       required to push or allocate the data description prior to a create
{       data description request.
{
