PRPSS_R 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 "Reporting structure standard WBS element" 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_PRPSS_R TYPE PRPSS_R.
The PRPSS_R table consists of various fields, each holding specific information or linking keys about Reporting structure standard WBS element data available in SAP. These include MANDT (Client), PSPNR (WBS Element), POSID (Work Breakdown Structure Element (WBS Element)), POST1 (PS: Short description (1st text line))... 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. .