FMCHECK_DOCS 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 "Documents for FM consistency checks" 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_FMCHECK_DOCS TYPE FMCHECK_DOCS.
The FMCHECK_DOCS table consists of various fields, each holding specific information or linking keys about Documents for FM consistency checks data available in SAP. These include BUKRS (Company Code), BELNR (Accounting Document Number), GJAHR (Fiscal Year), BUZEI (Number of Line Item Within Accounting Document)... 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. .