RSDMSM_MODEL_FIELDS 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 "Model Fields - Structure" 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_RSDMSM_MODEL_FIELDS TYPE RSDMSM_MODEL_FIELDS.
The RSDMSM_MODEL_FIELDS table consists of various fields, each holding specific information or linking keys about Model Fields - Structure data available in SAP. These include COLUMNNAME (Model Field Name), OBJVERS (Information for shipment of models), DATA_TYPE (Data Type), CHAR_MAX_LENGTH (Maximum length of the char field)... 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. .