--- a/devel-scm.rst	Thu Sep 29 00:10:44 2011 +0300
+++ b/devel-scm.rst	Thu Sep 29 00:19:45 2011 +0300
@@ -24,6 +24,7 @@
  * Component.
  * Version.
  * Milestone.
+ * Severity.
  * Priority.
  * Resolution.
 
@@ -61,7 +62,19 @@
 
 Milestone is a data when issue should be resolved.
 
+Severity.
+---------
+
+How danger is bug or issue. For example it may be crash, corruption (of user
+data), misspelling.
+
+Priority.
+---------
+
+How important is to fix bug. What bugs are first to fix.
+
 Resolution.
 -----------
 
 Reason for why a ticket was closed. One of fixed, invalid, wontfix, duplicate.
+