+.RS 4
+Import a set of variables into the event environment, depending on
+\fItype\fR:
+.PP
+\fBprogram\fR
+.RS 4
+Execute an external program specified as the assigned value and import its output, which must be in environment key format\.
+.RE
+.PP
+\fBfile\fR
+.RS 4
+Import a text file specified as the assigned value, which must be in environment key format\.
+.RE
+.PP
+\fBparent\fR
+.RS 4
+Import the stored keys from the parent device by reading the database entry of the parent device\. The value assigned to
+\fBIMPORT{parent}\fR
+is used as a filter of key names to import (with the same shell\-style pattern matching used for comparisons)\.
+.RE
+.sp
+If no option is given, udev will choose between