RSCREEN_MODELPARAM 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 "Screen Fields for Model Calculation" 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_RSCREEN_MODELPARAM TYPE RSCREEN_MODELPARAM.
The RSCREEN_MODELPARAM table consists of various fields, each holding specific information or linking keys about Screen Fields for Model Calculation data available in SAP. These include PURPOSE_OF_LOAN (Purpose of Loan), REQUESTED_AMOUNT (Net Loan Amount), REQUESTED_RATE (Installment Amount Requested by Loan Partner), REQUESTED_TERM (Calculated Term in Months)... 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. .