+ACTION=="remove", GOTO="cdrom_end"
+SUBSYSTEM!="block", GOTO="cdrom_end"
+KERNEL!="sr[0-9]*|xvd*", GOTO="cdrom_end"
+ENV{DEVTYPE}!="disk", GOTO="cdrom_end"
+
+# unconditionally tag device as CDROM
+KERNEL=="sr[0-9]*", ENV{ID_CDROM}="1"
+
+# media eject button pressed
+ENV{DISK_EJECT_REQUEST}=="?*", RUN+="cdrom_id --eject-media $tempnode", GOTO="cdrom_end"
+
+# import device and media properties and lock tray to
+# enable the receiving of media eject button events
+IMPORT{program}="cdrom_id --lock-media $tempnode"
+
+LABEL="cdrom_end"