+Match the subsystem of the event device.
+.TP 3n
+\fBATTR{\fR\fB\fIfilename\fR\fR\fB}\fR
+Match sysfs attribute values of the event device. Up to five
+\fBATTR\fR
+keys can be specified per rule. Trailing whitespace in the attribute values is ignored, if the specified match value does not contain trailing whitespace itself. Depending on the type of operator, this key is also used to set the value of a sysfs attribute.
+.TP 3n
+\fBKERNELS\fR
+Search the devpath upwards for a matching device name.
+.TP 3n
+\fBSUBSYSTEMS\fR