Something

define service{
        use             generic-service         ; Inherit default values from a template
        host_name               192.168.100.50
        service_description     HTTP
        check_command   check_http
        }

define service{
        use             generic-service         ; Inherit default values from a template
        host_name               192.168.100.50
        service_description     FTP
        check_command   check_ftp
        }