RCPS_IDL_ACT_PROCESS_PARAM is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Process Parameter for Action" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_RCPS_IDL_ACT_PROCESS_PARAM TYPE RCPS_IDL_ACT_PROCESS_PARAM.
The RCPS_IDL_ACT_PROCESS_PARAM table consists of various fields, each holding specific information or linking keys about Process Parameter for Action data available in SAP. These include POSNR_OLD (Sequential Number of Segment in IDoc Type), PP_ID (Process Parameter), CLASS (Class number), LABEL1 (Variable Identifier for Process Parameter Item)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .