questions on api netsnmp_create_table_data_set

I' m using net-snmp 5.3.1 and I use the netsnmp_create_table_data_set api to create a table.
I din't understand what is the purpose of table_name.
I give table_name both the value of a table defined inside MIB , in this case crTableDevices, and a dummy value ("DUMMY").
It's seems that there is no difference, the function succefully return and teh program run as excpected. 

netsnmp_table_data_set *table_set_devices_devices;
netsnmp_handler_registration * reginfo = 0;

    //strcpy( table_name, "crTableDevices" );
    strcpy( table_name, "DUMMY" );
    aesys_table_set_devices_devices = netsnmp_create_table_data_set( table_name );
    if( aesys_table_set_devices_devices == 0 )
    {
        DEBUGMSGTL(("aesys", "[initialize_table_crTableDevices] FAILED netsnmp_create_table_data_set( %s ) \n", table_name ));
        return;
    }

Do you have some explanation about the real utility of the parameter table_name.
BTW the help on net_snmp eplain feew details, do you know some other links where can I find more tutorial about how use net_snmp api ?

regards, Enzo

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