diff --git a/reference/fdf/book.xml b/reference/fdf/book.xml
index b2c3326932..052f1f3be2 100644
--- a/reference/fdf/book.xml
+++ b/reference/fdf/book.xml
@@ -3,7 +3,6 @@
 <!-- Membership: bundled, external -->
  
 <book xml:id="book.fdf" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
- <?phpdoc extension-membership="bundledexternal" ?>
  <title>Forms Data Format</title>
  <titleabbrev>FDF</titleabbrev>
  
diff --git a/reference/hash/book.xml b/reference/hash/book.xml
index 04b75634f1..e36c87788b 100644
--- a/reference/hash/book.xml
+++ b/reference/hash/book.xml
@@ -4,6 +4,7 @@
 <!-- State: experimental -->
  
 <book xml:id="book.hash" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <?phpdoc extension-membership="core" ?>
  <title>HASH Message Digest Framework</title>
  <titleabbrev>Hash</titleabbrev>
  
diff --git a/reference/ming/book.xml b/reference/ming/book.xml
index 4fec34a9ec..b55e359e47 100644
--- a/reference/ming/book.xml
+++ b/reference/ming/book.xml
@@ -4,7 +4,6 @@
 <!-- State: experimental -->
  
 <book xml:id="book.ming" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
- <?phpdoc extension-membership="bundledexternal" ?>
  <title>Ming (flash)</title>
  <titleabbrev>Ming</titleabbrev>
  
diff --git a/reference/mongo/book.xml b/reference/mongo/book.xml
index e805a9a949..660504e403 100644
--- a/reference/mongo/book.xml
+++ b/reference/mongo/book.xml
@@ -3,7 +3,6 @@
 <!-- Membership: pecl -->
 
 <book xml:id="book.mongo" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
- <?phpdoc extension-membership="pecl" ?>
  <title>MongoDB Native Driver</title>
  <titleabbrev>Mongo</titleabbrev>
 
diff --git a/reference/xslt/book.xml b/reference/xslt/book.xml
index d95150e025..7e9d8ddade 100644
--- a/reference/xslt/book.xml
+++ b/reference/xslt/book.xml
@@ -3,7 +3,6 @@
 <!-- Membership: bundled, external -->
  
 <book xml:id="book.xslt" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
- <?phpdoc extension-membership="bundledexternal" ?>
  <title>XSLT (PHP 4)</title>
  
  <!-- {{{ preface -->
diff --git a/reference/yaml/book.xml b/reference/yaml/book.xml
index 922a365751..b81cd74896 100644
--- a/reference/yaml/book.xml
+++ b/reference/yaml/book.xml
@@ -3,7 +3,6 @@
 <!-- Membership: pecl, bundled -->
 
 <book xml:id="book.yaml" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
- <?phpdoc extension-membership="bundled" ?>
  <title>YAML Data Serialization</title>
  <titleabbrev>Yaml</titleabbrev>