BPID001_STR 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 "Business Partner/ID Number Category/ID Number" 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_STR TYPE BPID001_STR.
The BPID001_STR table consists of various fields, each holding specific information or linking keys about Business Partner/ID Number Category/ID Number data available in SAP. These include CLIENT (Client), PARTNER (Business Partner Number), IDTYPE (ID Number Category for Business Partner), IDNUM (Identification Number for Business Partner)... 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. .