Warning, /pim/libksieve/src/ksieveui/autocreatescripts/autotests/data/keep-ref.siv is written in an unsupported language. File is not indexed. 

0001 require "date";
0002 require "imap4flags";
0003 
0004 # rule:[xxx]
0005 if date :is "" "year" "0000"
0006 {
0007     keep :flags [ "\\Flagged", "\\Seen" ];
0008     keep;
0009 }