VCTXT_KEY 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 "Table Prepared for Variant Conditions" 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_VCTXT_KEY TYPE VCTXT_KEY.
The VCTXT_KEY table consists of various fields, each holding specific information or linking keys about Table Prepared for Variant Conditions data available in SAP. These include CONDI (Edited error message for RFC calls), VARCOND (Variant condition), COND_INACTIVE (Condition is inactive)... 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. .