Middle-level qualifiers

Multiple middle-level qualifiers (MLQ) permit the isolation of certain profile and translation table data sets. Two of the possible middle-level qualifiers are:

Node name
Node name is an MLQ used in the search order for finding the configuration file PROFILE.TCPIP. Node name is determined by the parameters specified during VMCF initialization. For further information on initializing VMCF, see z/OS V2R1 Program Directory.
Function name
The TCP/IP implementation of multicultural support and double-byte character set (DBCS) support requires the use of multiple translation tables. To facilitate the concurrent use of multiple languages and code pages, TCP/IP uses a middle-level qualifier to designate which server or client uses a particular translation table. STANDARD, the default MLQ, is available for use if a single translation table can be used by multiple servers or clients. The TCP/IP Telnet client and FTP provide a TRANSLATE parameter that permits you to specify your chosen MLQ to replace the function name for that invocation of the command. For example, SRVRFTP is used as an MLQ by the File Transfer Protocol server.

The following data sets are some of the data sets that are only dynamically allocated by TCP/IP in a configuration file search order (you cannot specify them with DD statements in JCL):

ETC.PROTO               ETC.RPC
HOSTS.ADDRINFO          HOSTS.SITEINFO
SRVRFTP.TCPCHBIN        SRVRFTP.TCPHGBIN
SRVRFTP.TCPKJBIN        SRVRFTP.TCPSCBIN
SRVRFTP.TCPXLBIN        STANDARD.TCPCHBIN
STANDARD.TCPHGBIN       STANDARD.TCPKJBIN
STANDARD.TCPSCBIN       STANDARD.TCPXLBIN

For each of these data sets, the fully qualified name is established by using one of the following values as the data set HLQ:

User ID or job name
DATASETPREFIX value