COMT_SETTYPE_EXT 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 "Set Type" 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_COMT_SETTYPE_EXT TYPE COMT_SETTYPE_EXT.
The COMT_SETTYPE_EXT table consists of various fields, each holding specific information or linking keys about Set Type data available in SAP. These include FRGTYPE_GUID (Internal Key of a Set Type), FRGTYPE_ID (Identification of a Set Type), FRGTYPE_TAB (Database Table for the Set Type), FRGTYPE_DYNPRO (Subscreen for Maintaining Data on the Set Type)... 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. .