FMFA_ALL_DI 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 "Functional Area. Direct Input All Data" 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_FMFA_ALL_DI TYPE FMFA_ALL_DI.
The FMFA_ALL_DI table consists of various fields, each holding specific information or linking keys about Functional Area. Direct Input All Data data available in SAP. These include AKTYP (Activity Category), RLTP1 (BDT: Object part), RLTP2 (BDT: Object part), RLTP3 (BDT: Object part)... 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. .