CSKAU 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 "Explicit indicators for CSKAF" 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_CSKAU TYPE CSKAU.
The CSKAU table consists of various fields, each holding specific information or linking keys about Explicit indicators for CSKAF data available in SAP. These include MGEFLUNI (Unique ind. for fields in RK master data (used internally)), MSEHIUNI (Unique ind. for fields in RK master data (used internally))... 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. .