diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index d901f56fcb..3eccc2ab81 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -12262,15 +12262,27 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
             <glossdef>
                 <para role="glossdeffirst">
 <!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
-                    A list of variables allowed through from the build system
-                    configuration into the extensible SDK configuration.
-                    This list overrides the variables specified using the
+                    A list of variables allowed through from the OpenEmbedded
+                    build system configuration into the extensible SDK
+                    configuration.
+                    By default, the list of variables is empty and is set in
+                    the
+                    <link linkend='ref-classes-populate-sdk-*'><filename>populate-sdk-ext</filename></link>
+                    class.</para>
+
+                    <para>This list overrides the variables specified using the
                     <link linkend='var-SDK_LOCAL_CONF_BLACKLIST'><filename>SDK_LOCAL_CONF_BLACKLIST</filename></link>
                     variable as well as any variables identified by automatic
                     blacklisting due to the "/" character being found at the
                     start of the value, which is usually indicative of being a
                     path and thus might not be valid on the system where the
-                    SDK is installed.
+                    SDK is installed.</para>
+
+                    <para>For more information on
+                    <filename>SDK_LOCAL_CONF_WHITELIST</filename>, see the
+                    "<ulink url='&YOCTO_DOCS_SDK_URL;#sdk-configuring-the-extensible-sdk'>Configuring the Extensible SDK</ulink>"
+                    section in the Yocto Project Application Development and
+                    the Extensible Software Development Kit (eSDK) manual.
                 </para>
             </glossdef>
         </glossentry>