{
{    The purpose of this request is to establish access to the specified
{ service access point.  The specified service access point is opened over the
{ XNS internet layer and the OSI network layer via the Network Access Agent.
{ Datagrams may be sent and received over the opened service access point.
{
{       NAP$OPEN_NETWORK_SAP (SAP_PRIORITY, SAP, STATUS)
{
{ SAP_PRIORITY: (input)  This parameter specifies the priority to be associated
{       with the service access point which is opened as a result of this
{       request.
{
{ SAP: (input)  This parameter specifies the service access point to be opened
{       over the XNS internet layer and the OSI network layer.
{
{ STATUS: (output) This parameter specifies the request status.
{       CONDITIONS:
{             nae$allocation_failed
{             nae$sap_already_open
{       IDENTIFIER: 'NA'
{
