FRMLS_API_ITM 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: Special Attributes of API Item" 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_ITM TYPE FRMLS_API_ITM.
The FRMLS_API_ITM table consists of various fields, each holding specific information or linking keys about RMS-FRM: Special Attributes of API Item data available in SAP. These include ROLE (Component Type (Material, Substance, or Stream Item)), OVR_FACTOR (Overrun Factor), PO_FLG (Primary Output)... 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. .