DIACL_SELECTION_DS 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 "Dialog structure for selection" 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_DIACL_SELECTION_DS TYPE DIACL_SELECTION_DS.
The DIACL_SELECTION_DS table consists of various fields, each holding specific information or linking keys about Dialog structure for selection data available in SAP. These include TO_DATE (To date), TPLNR (Functional Location), EQUNR (Equipment Number), DEFECTS (New Input Values)... 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. .