How to find out that several devices belong to each other?

[Fabian Steiner]

Hello!

First of all, I would like to point that I does not have many experience 
in using HAL/DBus so far. So please forgive me if this question sounds 
stupid:

When I plug in a USB-Stick, `lshal --monitor` gives me the follwing output:

usb_device_781_5150_SNDK13DDF52557207702 added
usb_device_781_5150_SNDK13DDF52557207702_if0 added
usb_device_781_5150_SNDK13DDF52557207702_usbraw added
usb_device_781_5150_SNDK13DDF52557207702_if0_scsi_host added
usb_device_781_5150_SNDK13DDF52557207702_if0_scsi_host_scsi_device_lun0 
added
usb_device_781_5150_SNDK13DDF52557207702_if0_scsi_host_scsi_device_lun0_scsi_generic 
added
storage_serial_SanDisk_Cruzer_Mini_SNDK13DDF52557207702 added
volume_uuid_3B69_1AFD added

Obviously, more than device is created, but how can I find out that they 
all belong to the same physical device in fact. I need this information 
since I am currently working on a python application which depends on 
this thing.

I am looking forward to your answers!

Cheers,
Fabian