3242808 - Origin of the columns "Input Maps" and "Output Maps" in Process Report

We would like to understand where the columns "input maps" and "output maps" attributes come from in the Process Characteristics with element details report. In order to recreate, these are the documented steps that we took:

Reporting -> Process Characteristics with element details 

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

"Input/output maps" are tied to BPMN sub-process elements which is why it's reflected in the Process Characteristics with element details report.

KBA , BPI-SIG-PM-EXP , Explorer for SAP Signavio Process Manager , How To

SAP Signavio Process Manager all versions ; Signavio Process Manager all versions