--- a/HACKING.rst	Wed Aug 01 09:14:08 2012 +0300
+++ b/HACKING.rst	Sun Aug 05 23:26:34 2012 +0300
@@ -71,6 +71,20 @@
 As 'dictd -c5' format does not support comment syntax we filter out all
 lines that start with '#'.
 
+TODO convention.
+================
+
+Entries or parts of text that was not completed marked by keywords:
+
+  TODO
+                incomplete
+  XXX
+                urgent incomplete
+
+Makefile rules ``todo`` find this occurrence in sources::
+
+  $ make todo
+
 World wide dictionary formats and standards.
 ============================================