RFICOS_CONTAB_KEY_EXTEND 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 "Key Structure for Condition Table" 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_RFICOS_CONTAB_KEY_EXTEND TYPE RFICOS_CONTAB_KEY_EXTEND.
The RFICOS_CONTAB_KEY_EXTEND table consists of various fields, each holding specific information or linking keys about Key Structure for Condition Table data available in SAP. These include RANTYP (Contract Type), SKOGRP (Condition Group), O_CONTAB (Condition Table)... 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. .