When writing an implicit-mode program, you must call the IMS™ Assist module (CBLADLI, PLIADLI, ASMADLI, CADLI, as appropriate for the language you are using) instead of the conventional IMS equivalent (CBLTDLI, PLITDLI, ASMTDLI, CTDLI). This will cause the I/O PCB calls to be intercepted and processed (if necessary) by the Assist module. The Assist module will pass database calls directly to IMS for processing; it will intercept I/O PCB calls and issue the appropriate sockets calls. A sample call sequence (using COBOL syntax) for an implicit-mode server follows: