FPLAA_PS 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 "Application data for the billing plan for the 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_FPLAA_PS TYPE FPLAA_PS.
The FPLAA_PS table consists of various fields, each holding specific information or linking keys about Application data for the billing plan for the WBS element data available in SAP. These include POST1_PR (PS: Short description (1st text line)), PSPHI (Current number of the appropriate project), POST1_PD (PS: Short description (1st text line)), ERLAR (Revenue element for billing plan to WSB element)... 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. .