FRMLS_MOD_RUN_DATA_SEL 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 "Modeling Items" 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_MOD_RUN_DATA_SEL TYPE FRMLS_MOD_RUN_DATA_SEL.
The FRMLS_MOD_RUN_DATA_SEL table consists of various fields, each holding specific information or linking keys about Modeling Items data available in SAP. These include SUBSTANCE (Substance Key), MATERIAL (Material Number of an Item), STREAM (RMS-FRM: Object Identifier), FRMLID (RMS-FRM: Object Identifier)... 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. .