FMBLEXTBU is a standard SAP Table which is used to store Substitute BL Doc Types for Budget Docs data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The FMBLEXTBU table consists of various fields, each holding specific information or linking keys about Substitute BL Doc Types for Budget Docs data available in SAP. These include FM_AREA (Financial Management Area), VALUE_TYPE (BCS Value Type), DOC_TYPE (Budget entry document type), BL_DOC_TYPE (Budgetary Ledger Document Type)... 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. .