FRMLS_API_MATRIX 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-FRM: API - Component Data in a Matrix" 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_FRMLS_API_MATRIX TYPE FRMLS_API_MATRIX.
The FRMLS_API_MATRIX table consists of various fields, each holding specific information or linking keys about RMS-FRM: API - Component Data in a Matrix data available in SAP. These include FRML_LEVEL (Formula View), FRML (RMS-FRM: Object Identifier), CPT (Component in Formula Explosion), CPT_KIND (Component Category for Explosion (Internal))... 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. .