FMBLBASIC_DATA 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 "Data part of budgetary ledger client dependent customizing" 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_FMBLBASIC_DATA TYPE FMBLBASIC_DATA.
The FMBLBASIC_DATA table consists of various fields, each holding specific information or linking keys about Data part of budgetary ledger client dependent customizing data available in SAP. These include DOC_TYPE (Document Type), NEG_SIGN (Budgetary Ledger Posts with Negative Signs), FLG_NO_SPLIT (No splitting of BL Documents)... 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. .