MDM_DATA_PROPREFIX 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 "Auxiliary Fields MDC Framework (Copy of MDM_DATA)" 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_MDM_DATA_PROPREFIX TYPE MDM_DATA_PROPREFIX.
The MDM_DATA_PROPREFIX table consists of various fields, each holding specific information or linking keys about Auxiliary Fields MDC Framework (Copy of MDM_DATA) data available in SAP. These include XFELD (Checkbox), XIMSGID (Integration Engine: Message ID (Copy))... 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. .