AFFVD 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 "Dialog Table for Process Instruction Values in Orders" 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_AFFVD TYPE AFFVD.
The AFFVD table consists of various fields, each holding specific information or linking keys about Dialog Table for Process Instruction Values in Orders data available in SAP. These include MANDT (Client), AUFPL (Routing number of operations in the order), APLZL (General counter for order), APHZL (Internal Sub-Calculation Number)... 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. .