RSPLS_S_SELECTION_OBJECT 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 "Structure of Selection Object with Reference" 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_RSPLS_S_SELECTION_OBJECT TYPE RSPLS_S_SELECTION_OBJECT.
The RSPLS_S_SELECTION_OBJECT table consists of various fields, each holding specific information or linking keys about Structure of Selection Object with Reference data available in SAP. These include R_SELOBJ (Reference Type for Selection Object)... 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. .