diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 529f89c3d8..7e01b4ac05 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -335,7 +335,9 @@
         This comparison takes into account a complete build of the package with all
         dependencies previously built.
         The reason for this discrepancy is because the RPM package manager creates and
-        processes more metadata than the IPK package manager.
+        processes more 
+        <ulink url='&YOCTO_DOCS_DEV_URL;#metadata'>Metadata</ulink> than the 
+        IPK package manager.
         Consequently, you might consider setting <filename>PACKAGE_CLASSES</filename>
         to "package_ipk" if you are building smaller systems.
     </para>