FMBLEXTBS 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 "Source for Budgets in Derivation Tool for BL Extensions" 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_FMBLEXTBS TYPE FMBLEXTBS.
The FMBLEXTBS table consists of various fields, each holding specific information or linking keys about Source for Budgets in Derivation Tool for BL Extensions data available in SAP. These include FISC_YEAR (Fiscal Year), CASH_YEAR (Year of Cash Effectivity), CATEGORY (Budget Category in Funds Management), TRANSAC (Budgeting Process)... 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. .