RCPS_KEY_OBJ 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 "GUIDs of Process Elements" 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_KEY_OBJ TYPE RCPS_KEY_OBJ.
The RCPS_KEY_OBJ table consists of various fields, each holding specific information or linking keys about GUIDs of Process Elements data available in SAP. These include GUID_BB (Internal Identification for PVS Objects), GUID_RCP (Internal Identification for PVS Objects), GUID_MAST (Internal Identification for PVS Objects), DOKOB (Linked SAP Object)... 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. .