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

KERNEL[867.357117] add      /devices/pci0000:00/0000:00:1c.5/0000:05:00.3/memstick_host/memstick0/memstick0 (memstick)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.5/0000:05:00.3/memstick_host/memstick0/memstick0
MEMSTICK_CATEGORY=00
MEMSTICK_CLASS=00
MEMSTICK_TYPE=00
SEQNUM=1990
SUBSYSTEM=memstick
UDEV_LOG=3

UDEV  [867.358732] add      /devices/pci0000:00/0000:00:1c.5/0000:05:00.3/memstick_host/memstick0/memstick0 (memstick)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1c.5/0000:05:00.3/memstick_host/memstick0/memstick0
MEMSTICK_CATEGORY=00
MEMSTICK_CLASS=00
MEMSTICK_TYPE=00
SEQNUM=1990
SUBSYSTEM=memstick
UDEV_LOG=3
USEC_INITIALIZED=867357458

KERNEL[911.987512] remove   /devices/pci0000:00/0000:00:1c.5/0000:05:00.3/memstick_host/memstick0/memstick0 (memstick)
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:1c.5/0000:05:00.3/memstick_host/memstick0/memstick0
MEMSTICK_CATEGORY=00
MEMSTICK_CLASS=00
MEMSTICK_TYPE=00
SEQNUM=1991
SUBSYSTEM=memstick
UDEV_LOG=3

UDEV  [911.987833] remove   /devices/pci0000:00/0000:00:1c.5/0000:05:00.3/memstick_host/memstick0/memstick0 (memstick)
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:1c.5/0000:05:00.3/memstick_host/memstick0/memstick0
MEMSTICK_CATEGORY=00
MEMSTICK_CLASS=00
MEMSTICK_TYPE=00
SEQNUM=1991
SUBSYSTEM=memstick
UDEV_LOG=3
USEC_INITIALIZED=911987557