BAPI_CATT_OPSYS 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 "ALE: Structure for BAPI-eCATT BAPI -FILTYP" 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_BAPI_CATT_OPSYS TYPE BAPI_CATT_OPSYS.
The BAPI_CATT_OPSYS table consists of various fields, each holding specific information or linking keys about ALE: Structure for BAPI-eCATT BAPI -FILTYP data available in SAP. These include BAPI_OPSYS (ALE: Field for BAPI- eCATT)... 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. .