SIMAPARCORR_DATA_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 "IO: DI: Alt. Correspondence Data" 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_SIMAPARCORR_DATA_DI TYPE SIMAPARCORR_DATA_DI.
The SIMAPARCORR_DATA_DI table consists of various fields, each holding specific information or linking keys about IO: DI: Alt. Correspondence Data data available in SAP. These include COTYP (Correspondence Type), CORR_ROLE (Correspondence Roles), RECEIVER (Correspondence Recipient ID), SUBSTITUTE (Alternative or Additional Correspondence Recipient)... 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. .