FRMLS_API_AVH 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: Value Assignment Header" 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_AVH TYPE FRMLS_API_AVH.
The FRMLS_API_AVH table consists of various fields, each holding specific information or linking keys about RMS-FRM: Value Assignment Header data available in SAP. These include LINEMODE (Processing Status/Mode of a Record/Step Loop Line), STATUS (Status Information), STATUSCODE (RMS-FRM: Status Code), EXTHANDLE (Handle for API Client; Is Not Overwritten by API)... 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. .