reminder to describe subdomain keys with dots

diff --git a/SPEC.md b/SPEC.md
index a3254ee617a1bdd8a372ae9917ea2dc28780cebb..1c1292ce803bf65d6558f3bd641045cdbd72768c 100644 (file)
--- a/SPEC.md
+++ b/SPEC.md
@@ -307,6 +307,9 @@ the current domain object.
 
 #### map attribute
 
+FIXME - explain handling of the keys with dots.
+Also, add checks to the code to disallow empty elements.
+
 JSON Map object containing subdomain names as its keys and domain
 objects as values. Element of the map with empty key "" has special
 meaning: the value of this map element is merged into the current