CIFSRDCUS 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 "Struct. for Cust.-Spec. Enhancements for CIFTDSRC/SchedAgmt" 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_CIFSRDCUS TYPE CIFSRDCUS.
The CIFSRDCUS table consists of various fields, each holding specific information or linking keys about Struct. for Cust.-Spec. Enhancements for CIFTDSRC/SchedAgmt data available in SAP. These include EBELP (Item Number of Document (Purchasing, Sales...))... 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. .