WCSSCR 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 "WCM: Output Structure for Selection Screens" 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_WCSSCR TYPE WCSSCR.
The WCSSCR table consists of various fields, each holding specific information or linking keys about WCM: Output Structure for Selection Screens data available in SAP. These include IWERK (Maintenance Planning Plant), OBJART (Object Type), OBJTYP (Type of WCM Object), OBJNR (Object 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. .