--- a/doc/book/en/annexes/rql/debugging.rst	Fri Dec 14 14:08:14 2012 +0100
+++ b/doc/book/en/annexes/rql/debugging.rst	Tue Dec 11 18:20:00 2012 +0100
@@ -15,6 +15,8 @@
 .. autodata:: cubicweb.server.DBG_SQL
 .. autodata:: cubicweb.server.DBG_REPO
 .. autodata:: cubicweb.server.DBG_MS
+.. autodata:: cubicweb.server.DBG_HOOKS
+.. autodata:: cubicweb.server.DBG_OPS
 .. autodata:: cubicweb.server.DBG_MORE
 .. autodata:: cubicweb.server.DBG_ALL
 
@@ -31,6 +33,14 @@
 
 .. autofunction:: cubicweb.server.set_debug
 
+Another example showing how to debug hooks at a specific code site:
+
+.. sourcecode:: python
+
+    from cubicweb.server import debuged, DBG_HOOKS
+    with debugged(DBG_HOOKS):
+        person.cw_set(works_for=company)
+
 
 Detect largest RQL queries
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~