FMPA_DISPLAY_DOCS 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 "Output Structure for Payment Selection" 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_FMPA_DISPLAY_DOCS TYPE FMPA_DISPLAY_DOCS.
The FMPA_DISPLAY_DOCS table consists of various fields, each holding specific information or linking keys about Output Structure for Payment Selection data available in SAP. These include KNBELNR (FI document number), KNGJAHR (Fiscal year for FI document number), VOBUKRS (Company code for payment document number), VOBELNR (Payment Document Number)... 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. .