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

KERNEL[1240072209.156190] change   /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sr
MODALIAS=scsi:t-0x05
SEQNUM=1748

KERNEL[1240072209.158538] change   /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0
SUBSYSTEM=block
DEVTYPE=disk
SEQNUM=1749
MAJOR=11
MINOR=0

UDEV  [1240072209.158699] change   /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sr
MODALIAS=scsi:t-0x05
SEQNUM=1748

UDEV  [1240072212.564943] change   /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0
SUBSYSTEM=block
DEVTYPE=disk
SEQNUM=1749
ID_CDROM=1
ID_CDROM_DVD=1
ID_CDROM_MRW=1
ID_CDROM_MRW_W=1
ID_CDROM_MEDIA_CD=1
ID_CDROM_MEDIA_STATE=blank
ID_CDROM_MEDIA_SESSION_NEXT=2894
ID_CDROM_MEDIA_SESSION_COUNT=19194
ID_CDROM_MEDIA_TRACK_COUNT=47323
ID_VENDOR=TSSTcorp
ID_VENDOR_ENC=TSSTcorp
ID_MODEL=DVD-ROM_TS-H353B
ID_MODEL_ENC=DVD-ROM\x20TS-H353B
ID_REVISION=D200
ID_TYPE=cd
ID_BUS=scsi
ID_PATH=pci-0000:00:1f.2-scsi-1:0:0:0
GENERATED=1
DEVNAME=/dev/sr0
MAJOR=11
MINOR=0
DEVLINKS=/dev/block/11:0 /dev/scd0 /dev/disk/by-path/pci-0000:00:1f.2-scsi-1:0:0:0 /dev/cdrom1 /dev/dvd1

KERNEL[1240072219.610461] change   /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sr
MODALIAS=scsi:t-0x05
SEQNUM=1750

KERNEL[1240072219.611035] change   /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0
SUBSYSTEM=block
DEVTYPE=disk
SEQNUM=1751
MAJOR=11
MINOR=0

UDEV  [1240072219.611326] change   /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0 (scsi)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0
SUBSYSTEM=scsi
SDEV_MEDIA_CHANGE=1
DEVTYPE=scsi_device
DRIVER=sr
MODALIAS=scsi:t-0x05
SEQNUM=1750

UDEV  [1240072220.996310] change   /devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0 (block)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/block/sr0
SUBSYSTEM=block
DEVTYPE=disk
SEQNUM=1751
ID_CDROM=1
ID_CDROM_DVD=1
ID_CDROM_MRW=1
ID_CDROM_MRW_W=1
ID_CDROM_MEDIA_CD=1
ID_CDROM_MEDIA_STATE=complete
ID_CDROM_MEDIA_SESSION_COUNT=1
ID_CDROM_MEDIA_TRACK_COUNT=22
ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=22
ID_VENDOR=TSSTcorp
ID_VENDOR_ENC=TSSTcorp
ID_MODEL=DVD-ROM_TS-H353B
ID_MODEL_ENC=DVD-ROM\x20TS-H353B
ID_REVISION=D200
ID_TYPE=cd
ID_BUS=scsi
ID_PATH=pci-0000:00:1f.2-scsi-1:0:0:0
GENERATED=1
DEVNAME=/dev/sr0
MAJOR=11
MINOR=0
DEVLINKS=/dev/block/11:0 /dev/scd0 /dev/disk/by-path/pci-0000:00:1f.2-scsi-1:0:0:0 /dev/cdrom1 /dev/dvd1