The main task of the post processor is to run any post processing actions and create a psuedo context file named [PGE_type]_context.json.
The Post Processor queries:
Mozart for job information and products staged.
GRQ for product’s metadata
Psuedo context file
The file's purpose is to pass metadata of the previous smap_sciflo process (PGE run) to the next one's input preprocessor. It contains information about product produced and the job status of the PGE run.
The IPP is designed to parse and use the psuedo context file, if you want to create a workflow with multiple PGE executions.