BPID001_DI 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 "Additional Partner Numbers - Direct Input" 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_BPID001_DI TYPE BPID001_DI.
The BPID001_DI table consists of various fields, each holding specific information or linking keys about Additional Partner Numbers - Direct Input data available in SAP. These include IDNUM (Identification Number for Business Partner), IDTYPE (ID Number Category for Business Partner), IDNUM (Identification Number for Business Partner), CHIND_IDT (Change category)... 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. .