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IMS DC courses outline

Introduction

1. IMS - DC Concepts. IMS DC architecture
2. MPP regions, BMP regions, CONTROL regions, TERMINAL and SECURITY, Logical Terminals, security features
3. Types of input messages
4. PSB, PCB requirements for DC programming as against IMS DB programming
5. COBOL, PL/I basics for message processing programs - MPPs
6. Error codes encountered while running IMS programs – QC, QD


COBOL basics for message processing programs

1. Retrieving input message - GU call, Message-in-area
2. Sending output message - ISRT call, Message-out-area
3. PCB mask definition in linkage section

Introduction to MFS and dynamic attribute modification

1. DIF/DOF, MID, MOD control blocks. PF KEY usage
2. Frequently used IMS commands: START, FORMAT, TEST

Screen navigation techniques

1. Format controlled (Switching between screens using MODNAME)
2. Using alternate PCBs (Switching between programs using alternate PCBs, CHNG, ISRT and PURG calls)

Techniques to store data between transactions and passing data from one transaction to another

1. As hidden values on the screen
2. Using a DB2 table for storing intermediate data
3. Using scratch pad area (SPA)

Batch message programs

1. Error handling. ROLL calls
2. Check pointing and restart. CHKP and XRST calls
3. Basic and Symbolic checkpointing

How to develop conversational programs using SPA

Case Study:

1. Project related hints and tips