diff --git a/reference/yaf/yaf_registry/clone.xml b/reference/yaf/yaf_registry/clone.xml
index 0cbaa700cb..a8754b1b28 100644
--- a/reference/yaf/yaf_registry/clone.xml
+++ b/reference/yaf/yaf_registry/clone.xml
@@ -16,9 +16,6 @@
   <para>
 
   </para>
-
-  &warn.undocumented.func;
-
  </refsect1>
 
  <refsect1 role="parameters">
diff --git a/reference/yaf/yaf_registry/construct.xml b/reference/yaf/yaf_registry/construct.xml
index eaa4e1d6ba..cbf86ce908 100644
--- a/reference/yaf/yaf_registry/construct.xml
+++ b/reference/yaf/yaf_registry/construct.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="yaf-registry.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>Yaf_Registry::__construct</refname>
-  <refpurpose>The __construct purpose</refpurpose>
+  <refpurpose>Yaf_Registry implements singleton</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -16,9 +16,6 @@
   <para>
 
   </para>
-
-  &warn.undocumented.func;
-
  </refsect1>
 
  <refsect1 role="parameters">
diff --git a/reference/yaf/yaf_registry/del.xml b/reference/yaf/yaf_registry/del.xml
index 00788c94b1..f527b66278 100644
--- a/reference/yaf/yaf_registry/del.xml
+++ b/reference/yaf/yaf_registry/del.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="yaf-registry.del" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>Yaf_Registry::del</refname>
-  <refpurpose>The del purpose</refpurpose>
+  <refpurpose>Remove an item from registry</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -14,11 +14,8 @@
    <methodparam><type>string</type><parameter>name</parameter></methodparam>
   </methodsynopsis>
   <para>
-
+   Remove an item from registry
   </para>
-
-  &warn.undocumented.func;
-
  </refsect1>
 
  <refsect1 role="parameters">
diff --git a/reference/yaf/yaf_registry/get.xml b/reference/yaf/yaf_registry/get.xml
index d34e828753..79480c5fe3 100644
--- a/reference/yaf/yaf_registry/get.xml
+++ b/reference/yaf/yaf_registry/get.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="yaf-registry.get" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>Yaf_Registry::get</refname>
-  <refpurpose>The get purpose</refpurpose>
+  <refpurpose>Retrieve an item from registry</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -14,11 +14,8 @@
    <methodparam><type>string</type><parameter>name</parameter></methodparam>
   </methodsynopsis>
   <para>
-
+   Retrieve an item from registry
   </para>
-
-  &warn.undocumented.func;
-
  </refsect1>
 
  <refsect1 role="parameters">
diff --git a/reference/yaf/yaf_registry/has.xml b/reference/yaf/yaf_registry/has.xml
index c729143547..bc00645e56 100644
--- a/reference/yaf/yaf_registry/has.xml
+++ b/reference/yaf/yaf_registry/has.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="yaf-registry.has" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>Yaf_Registry::has</refname>
-  <refpurpose>The has purpose</refpurpose>
+  <refpurpose>Check whether an item exists</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -14,11 +14,8 @@
    <methodparam><type>string</type><parameter>name</parameter></methodparam>
   </methodsynopsis>
   <para>
-
+    Check whether an item exists
   </para>
-
-  &warn.undocumented.func;
-
  </refsect1>
 
  <refsect1 role="parameters">
diff --git a/reference/yaf/yaf_registry/set.xml b/reference/yaf/yaf_registry/set.xml
index 9d7fd6b415..96ef636552 100644
--- a/reference/yaf/yaf_registry/set.xml
+++ b/reference/yaf/yaf_registry/set.xml
@@ -4,7 +4,7 @@
 <refentry xml:id="yaf-registry.set" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
   <refname>Yaf_Registry::set</refname>
-  <refpurpose>The set purpose</refpurpose>
+  <refpurpose>Add an item into registry</refpurpose>
  </refnamediv>
 
  <refsect1 role="description">
@@ -15,11 +15,8 @@
    <methodparam><type>string</type><parameter>value</parameter></methodparam>
   </methodsynopsis>
   <para>
-
+   Add an item into registry
   </para>
-
-  &warn.undocumented.func;
-
  </refsect1>
 
  <refsect1 role="parameters">