KPP5S 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 "Key figure control table" 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_KPP5S TYPE KPP5S.
The KPP5S table consists of various fields, each holding specific information or linking keys about Key figure control table data available in SAP. These include FFLAG (Flag: Type of basic fields), INPUT (Indicator: 'Field is ready for input'), SOLVED (Formula could be resolved)... 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. .