FRMLS_ENV_MODIF 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 "Assignment: Modification Group<->Environment Parameters" 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_ENV_MODIF TYPE FRMLS_ENV_MODIF.
The FRMLS_ENV_MODIF table consists of various fields, each holding specific information or linking keys about Assignment: Modification Group<->Environment Parameters data available in SAP. These include ENV_PARAM (Environment Parameters for Formulas)... 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. .