From f45761ef4c29fbedcc841281175f6ce36e7e15ef Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 17 Jan 2011 14:34:37 +0200
Subject: Add note on default-constructibility of object id type

---
 doc/manual.xhtml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/manual.xhtml b/doc/manual.xhtml
index a734c04..d2c65c6 100644
--- a/doc/manual.xhtml
+++ b/doc/manual.xhtml
@@ -1673,6 +1673,7 @@ private:
 };
   </pre>
 
+  <p>The object id type should be default-constructible.</p>
 
   <p>You may be wondering whether we also have to declare value types
      as persistent. We don't need to do anything special for simple value
-- 
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