+Search the devpath upwards for a device with matching sysfs attribute values. Up to five
+\fBSYSFS\fR
+keys can be specified per rule. All attributes must match on the same device. Trailing whitespace in the attribute values is ignored, if the specified match value does not contain trailing whitespace itself.
+.TP
+\fBENV{\fR\fB\fIkey\fR\fR\fB}\fR
+Match against the value of an environment variable. Up to five
+\fBENV\fR
+keys can be specified per rule. This key can also be used to export a variable to the environment.