7.1.2 Explicit API
An IMS application program can use the explicit API to issue the CPI-C calls directly. The explicit API is useful with remote LU 6.2 systems that have incomplete LU 6.2 implementations, or that are incompatible with the IMS implicit API support.
The explicit API can be used by any IMS application program to
access an APPC conversation directly. IMS resources are available
to the CPI-C driven application program only if the application
issues the APSB (Allocate_ PSB) call. The CPI-C driven application
program must use the CPI-RR SRRCMIT
and
SRRBACK
verbs to initiate an IMS sync point or
backout.
Parent topic: APPC/IMS Overview