WCSUN 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: Data on Untagging" 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_WCSUN TYPE WCSUN.
The WCSUN table consists of various fields, each holding specific information or linking keys about WCM: Data on Untagging data available in SAP. These include UNPROC (Untagging Condition), UNTYP (Untagging Type), UNSEQ (Sequence for Untagging), UNTXT (Comment Line for Untagging)... 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. .