To restrict the concurrent use of a workstation file through ISPF's distributed editing or FILEXFER service, ISPF issues this ENQ macro for the workstation file:

      ENQ SPFEDIT,wsname,E,255,SYSTEMS

where

wsname

The workstation address (IP:tcpip-address or LU:appc-address), padded with blanks to 68 characters, followed by the workstation file name identifier, padded with blanks to 187 characters. The entire string is padded to 255 characters with blanks.