FMBLCOREIN 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 "Budgetary Ledger Interface" 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_FMBLCOREIN TYPE FMBLCOREIN.
The FMBLCOREIN table consists of various fields, each holding specific information or linking keys about Budgetary Ledger Interface data available in SAP. These include OBJ_SYS (Logical system of source document), REF_ORG_UN (Reference Organizational Units), REFDOCNR (Reference document number of an accounting document), OBJ_POS (Reference line item)... 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. .