BUP_S_IDEN_DATA_API 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 "BP-API: Data of MD Segment Identification" 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_BUP_S_IDEN_DATA_API TYPE BUP_S_IDEN_DATA_API.
The BUP_S_IDEN_DATA_API table consists of various fields, each holding specific information or linking keys about BP-API: Data of MD Segment Identification data available in SAP. These include PARTNER (Business Partner Number), TYPE (Identification Type), IDNUMBER (Identification Number), INSTITUTE (Responsible Institution for ID 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. .