monitor will print the received events for:
UDEV - the event which udev sends out after rule processing

UDEV  [1261767870.493479] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/004/003
DEVTYPE=usb_device
DEVICE=/proc/bus/usb/004/003
PRODUCT=f88/42d/100
TYPE=0/0/0
BUSNUM=004
DEVNUM=003
SEQNUM=1935
ID_VENDOR=VTech
ID_VENDOR_ENC=VTech
ID_VENDOR_ID=0f88
ID_MODEL=Kidizoom
ID_MODEL_ENC=Kidizoom
ID_MODEL_ID=042d
ID_REVISION=0100
ID_SERIAL=VTech_Kidizoom_123456789ABCDEF
ID_SERIAL_SHORT=123456789ABCDEF
ID_BUS=usb
ID_USB_INTERFACES=:080650:
MAJOR=189
MINOR=386
DEVLINKS=/dev/char/189:386

UDEV  [1261767870.496071] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
DEVICE=/proc/bus/usb/004/003
PRODUCT=f88/42d/100
TYPE=0/0/0
INTERFACE=8/6/80
MODALIAS=usb:v0F88p042Dd0100dc00dsc00dp00ic08isc06ip50
SEQNUM=1936

UDEV  [1261767870.498058] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=1937

UDEV  [1261767870.498210] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/scsi_host/host9 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/scsi_host/host9
SUBSYSTEM=scsi_host
SEQNUM=1938

UDEV  [1261767875.493620] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_target
SEQNUM=1939

UDEV  [1261767875.493638] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=1940

UDEV  [1261767875.493651] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/scsi_device/9:0:0:0 (scsi_device)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/scsi_device/9:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=1942

UDEV  [1261767875.493662] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/scsi_disk/9:0:0:0 (scsi_disk)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/scsi_disk/9:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=1941

UDEV  [1261767875.494055] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/scsi_generic/sg5 (scsi_generic)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/scsi_generic/sg5
SUBSYSTEM=scsi_generic
DEVNAME=/dev/sg5
SEQNUM=1943
MAJOR=21
MINOR=5
DEVLINKS=/dev/char/21:5

UDEV  [1261767875.505649] change   /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sd
MODALIAS=scsi:t-0x00
SEQNUM=1944

UDEV  [1261767875.529932] add      /devices/virtual/bdi/8:64 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/8:64
SUBSYSTEM=bdi
SEQNUM=1947

UDEV  [1261767877.587453] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/block/sde (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/block/sde
SUBSYSTEM=block
DEVNAME=/dev/sde
DEVTYPE=disk
SEQNUM=1945
ID_VENDOR=VTech
ID_VENDOR_ENC=VTech\x20\x20\x20
ID_VENDOR_ID=0f88
ID_MODEL=Kidizoom
ID_MODEL_ENC=Kidizoom\x20\x20\x20\x20\x20\x20\x20\x20
ID_MODEL_ID=042d
ID_REVISION=1.01
ID_SERIAL=VTech_Kidizoom_123456789ABCDEF-0:0
ID_SERIAL_SHORT=123456789ABCDEF
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_USB_INTERFACES=:080650:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usb-storage
ID_PATH=pci-0000:00:1a.1-usb-0:2:1.0-scsi-0:0:0:0
DKD_MEDIA_AVAILABLE=1
DKD_PARTITION_TABLE=1
DKD_PARTITION_TABLE_SCHEME=mbr
DKD_PRESENTATION_NOPOLICY=0
MAJOR=8
MINOR=64
DEVLINKS=/dev/block/8:64 /dev/disk/by-id/usb-VTech_Kidizoom_123456789ABCDEF-0:0 /dev/disk/by-path/pci-0000:00:1a.1-usb-0:2:1.0-scsi-0:0:0:0

UDEV  [1261767877.837563] add      /devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/block/sde/sde1 (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1a.1/usb4/4-2/4-2:1.0/host9/target9:0:0/9:0:0:0/block/sde/sde1
SUBSYSTEM=block
DEVNAME=/dev/sde1
DEVTYPE=partition
SEQNUM=1946
ID_VENDOR=VTech
ID_VENDOR_ENC=VTech\x20\x20\x20
ID_VENDOR_ID=0f88
ID_MODEL=Kidizoom
ID_MODEL_ENC=Kidizoom\x20\x20\x20\x20\x20\x20\x20\x20
ID_MODEL_ID=042d
ID_REVISION=1.01
ID_SERIAL=VTech_Kidizoom_123456789ABCDEF-0:0
ID_SERIAL_SHORT=123456789ABCDEF
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_USB_INTERFACES=:080650:
ID_USB_INTERFACE_NUM=00
ID_USB_DRIVER=usb-storage
ID_PATH=pci-0000:00:1a.1-usb-0:2:1.0-scsi-0:0:0:0
DKD_PARTITION=1
DKD_PARTITION_SCHEME=mbr
DKD_PARTITION_NUMBER=1
DKD_PARTITION_TYPE=0x06
DKD_PARTITION_SIZE=47702528
DKD_PARTITION_FLAGS=boot
DKD_PRESENTATION_NOPOLICY=0
MAJOR=8
MINOR=65
DEVLINKS=/dev/block/8:65 /dev/disk/by-id/usb-VTech_Kidizoom_123456789ABCDEF-0:0-part1 /dev/disk/by-path/pci-0000:00:1a.1-usb-0:2:1.0-scsi-0:0:0:0-part1

UDEV  [1261767888.565935] remove   /devices/virtual/bdi/0:25 (bdi)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/virtual/bdi/0:25
SUBSYSTEM=bdi
SEQNUM=1948