RCPS_API_SRCH_UNIQUE_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 "RMS-RCP: API - Structure for Artificial Primary Key" 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_RCPS_API_SRCH_UNIQUE_KEY TYPE RCPS_API_SRCH_UNIQUE_KEY.
The RCPS_API_SRCH_UNIQUE_KEY table consists of various fields, each holding specific information or linking keys about RMS-RCP: API - Structure for Artificial Primary Key data available in SAP. These include UNIQUE_KEY (Artificial Primary Key for API Attribute Tables)... 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. .