VBEXVB 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 "Export Control: Reference Structure for XVBEX / YVBEX" 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_VBEXVB TYPE VBEXVB.
The VBEXVB table consists of various fields, each holding specific information or linking keys about Export Control: Reference Structure for XVBEX / YVBEX data available in SAP. These include MANDT (Client), VBELN (Sales and Distribution Document Number), POSNR (Item number of the SD document), GEGRU (Legal regulation for legal control)... 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. .