diff --git a/entities/entities.title.ent b/entities/entities.title.ent
index ba9308802..473b1c513 100644
--- a/entities/entities.title.ent
+++ b/entities/entities.title.ent
@@ -38,6 +38,7 @@ tags used in reference/ and other files to mark section titles.
 <entity name="InheritedMethods">Inherited methods</entity>
 
 <entity name="InheritedProperties">Inherited properties</entity>
+<entity name="LanguageReference">Core Language Reference</entity>
 
 <entity name="Methods">Methods</entity>
 
diff --git a/manual.xml b/manual.xml
index cb0cd36b5..fe2e86dfd 100644
--- a/manual.xml
+++ b/manual.xml
@@ -17,6 +17,24 @@
  <title>&ThirdPartyManual;</title>
  &bookinfo;
 
+ <book xml:id="langref" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <title>&LanguageReference;</title>
+  <preface xml:id="langref.intro">
+   <title>About this book</title>
+   <simpara>
+    The extension documentation refers to types, interfaces, classes,
+    exceptions and constants that are defined by PHP itself or by its bundled
+    extensions. This book holds short summaries of those pages so that such
+    references resolve inside this manual; every summary links to the full
+    documentation in the <link xlink:href="&url.php.docs;">PHP manual</link>.
+   </simpara>
+  </preface>
+  &language.types;
+  &language.predefined.interfaces;
+  &language.predefined.exceptions;
+  &language.predefined.constants;
+ </book>
+
  <!--
   Each third-party extension lives in its own directory under reference/
   and is included here as a book entity, one per extension.