BPI3000_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 "Business Partner: Additional Data (Grouping/User Texts)" 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_BPI3000_DI TYPE BPI3000_DI.
The BPI3000_DI table consists of various fields, each holding specific information or linking keys about Business Partner: Additional Data (Grouping/User Texts) data available in SAP. These include SGRP2 (Group Key 2 (Freely-Definable - 3 Figure Number)), SGRP3 (Group Key 3 (Freely-Definable - 3 Figure Number)), SGRP4 (Group key 4 (freely-definable - 3 figure number)), SGRP5 (Group key 5 (freely-definable - 3 figure 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. .