CIF_SL_REQ 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 "Customer demand interface" 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_CIF_SL_REQ TYPE CIF_SL_REQ.
The CIF_SL_REQ table consists of various fields, each holding specific information or linking keys about Customer demand interface data available in SAP. These include ATPCAT (ATP Category in APO), DOC_NUMBER (Document Number (Purchasing/Sales...)), ITM_NUMBER (Item number of the SD document), SCHED_LINE (Delivery Schedule Line 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. .