Using the Predefined Field NEXT CHILD ID
The predefined field NEXT CHILD ID can be used to alter the sequence of child process invocation. Normally, child processes are invoked in sequence number order. However, if NEXT CHILD ID is set, the first child process with a CHILD ID that matches the value in NEXT CHILD ID is invoked.
NEXT CHILD ID is also used to manage forward and backward navigation through the images in input processes. As a user moves 'forward' through the entry screens, NEXT CHILD ID is set by APPX to +. If a user moves 'backward' through the entry screens by selecting Previous Activity, NEXT CHILD ID is set by APPX to ?, in which case APPX navigates backward through the child processes.
If this field is set in the End of Frame event point on a frame that has automatic child processes, the first child process defined with a CHILD ID that matches NEXT CHILD ID will be invoked. Once that child is completed, processing continues normally.
If this field is set in the Pre-Invocation event point, processing will immediately skip to the first child encountered that has a matching CHILD ID.
If this field is set in the Post Invocation event point, the next child process that is invoked will be the first child process encountered where CHILD ID matches NEXT CHILD ID.
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