userid is the user ID of the logged on TSO user.
TSOprefix is the data set prefix established by the TSO PROFILE command. userid is the default value of TSOprefix.
jobname is the job name specified on the JOB statement for a job stream or the procedure name for a started procedure.
hlq is the TCP/IP HLQ distributed as the system default, which can be overridden by the value in the DATASETPREFIX statement.
nodename is an MLQ that is used to define the data set name for the TCP/IP stack profile data set.
function_name denotes an acronym specifying a particular TCP/IP server (for example SRVRFTP for the FTP server) and is used as an MLQ for the translation table data set for that application.
private_name is a user-specified private qualifier that can be specified as an option on some TCP/IP commands.
The member of a system data set used to find the configuration file TCPIP.DATA.