WCSALV34 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: Log of Assignments" 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_WCSALV34 TYPE WCSALV34.
The WCSALV34 table consists of various fields, each holding specific information or linking keys about WCM: Log of Assignments data available in SAP. These include WAPNR (Work Approval), WAPINR (Application), WCNR (Operational Work Clearance Document), STXT (Descriptive Short Text)... 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. .