@@ 23,4 23,19 @@ 2013-08-22T15:53:02-07:00 hello world
 Log format
 ----------
 
-{RFC3339} {message}\n
+    [-+]{RFC3339} {message}\n
+
++ Addition
+- Deletion
+
+If prefix is '+' add entry to the logs, if prefix is '-' remove the 1st
+corresponding entry from the logs.
+
+Example (Python):
+
+    logs = [
+        '+2013-09-03T10:00:00-04:00 test\n',
+        '-2013-09-03T10:00:00-04:00 test\n',
+        '+2013-09-03T11:00:00-04:00 test\n',
+        '-2013-09-03T12:00:00-04:00 test\n',
+    ]