BAPI_STR_ADDITION_SEL 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 "Selection Criteria for Additional Information" 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_BAPI_STR_ADDITION_SEL TYPE BAPI_STR_ADDITION_SEL.
The BAPI_STR_ADDITION_SEL table consists of various fields, each holding specific information or linking keys about Selection Criteria for Additional Information data available in SAP. These include ADDTYPE (Information Category), DATA_TYPE (Information Type), TIMESTAMP_UTC (UTC Time Stamp in Short Form (YYYYMMDDhhmmss)), COUNTER (Counter)... 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. .