Application programs

Each application program must be defined within an application program major node. Each application program represents a minor node.

You define an application program major node with one VBUILD definition statement, and you define application program minor nodes with one APPL definition statement for each application program in the major node. A sample of definition statements for an application program major node is provided. Each APPL definition statement represents a single logical unit to VTAM®.

APPLNODE VBUILD TYPE=APPL
A50PAYRL APPL   AUTH=ACQ,         PERMIT APPLICATION TO ACQUIRE LUS
                EAS=1000,         CONCURRENT APPLICATION SESSIONS
                MODETAB=COMTAB,   LOGON MODE TABLE—APPLICATION IS SLU
                APPC=YES,         ENABLE LU 6.2 SUPPORT
                PARSESS=YES,      ENABLE PARALLEL SESSION FOR LU 6.2 SUPPORT
                ACBNAME=PAYROLL,  NETWORK LU NAME=A50PAYRL
                                  VTAM APPLICATION APPLID=PAYROLL
                ⋮
A50ACCTS APPL   ATNLOSS=ALL,      ENABLE ATTN EXIT FOR ALL LU 6.2 SESSIONS
                APPC=YES,         ENABLE LU 6.2 SUPPORT
                PARSESS=YES,      ENABLE PARALLEL SESSION FOR LU 6.2 SUPPORT
                SECACPT=ALREADYV, ACCEPT ALREADY VERIFIED LU 6.2 CONVERSATIONS
                ACBNAME=ACCOUNTS  NETWORK LU NAME=A50ACCTS
                                  VTAM APPLICATION APPLID=ACCOUNTS
                ⋮

You can also code a model application program definition, which can be used as the definition for one or more VTAM application programs. For some application programs, such as Telnet or TSO/VTAM, using model application program definitions can save on resources (such as host network addresses) and is recommended.