BBPS_FM_TESTDATA 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 "Structure with Key Fields for FM Test 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_BBPS_FM_TESTDATA TYPE BBPS_FM_TESTDATA.
The BBPS_FM_TESTDATA table consists of various fields, each holding specific information or linking keys about Structure with Key Fields for FM Test Data data available in SAP. These include GRUPPE (Name of ABAP/4 Development Workbench object), NAME (Name of ABAP/4 Development Workbench object), NUMMER (Name of ABAP/4 Development Workbench object), SEQID (Function Key)... 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. .