--- a/Overview.html	Mon Nov 12 17:28:10 2012 +0900
+++ b/Overview.html	Mon Nov 12 17:33:54 2012 +0900
@@ -1528,6 +1528,12 @@
        <dt>source origin</dt>
        <dd>The <a href="#xmlhttprequest-origin"><code>XMLHttpRequest</code> origin</a>.</dd>
 
+       <dt>referer source
+       <dd>If the <a href="#anonymous-flag">anonymous flag</a> is set the
+       <a class="external" href="http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#url">URL</a>
+       "<code title="">about:blank</code>", or the
+       <a href="#xmlhttprequest-referer-source"><code>XMLHttpRequest</code> referer source</a> otherwise.
+
        <dt>omit credentials flag</dt>
        <dd>Set if
        <code title="dom-XMLHttpRequest-withCredentials"><a href="#dom-xmlhttprequest-withcredentials">withCredentials</a></code>

--- a/Overview.src.html	Mon Nov 12 17:28:10 2012 +0900
+++ b/Overview.src.html	Mon Nov 12 17:33:54 2012 +0900
@@ -1492,6 +1492,12 @@
        <dt>source origin</dt>
        <dd>The <span><code>XMLHttpRequest</code> origin</span>.</dd>
 
+       <dt>referer source
+       <dd>If the <span>anonymous flag</span> is set the
+       <span data-anolis-spec=html>URL</span>
+       "<code title>about:blank</code>", or the
+       <span><code>XMLHttpRequest</code> referer source</span> otherwise.
+
        <dt>omit credentials flag</dt>
        <dd>Set if
        <code title="dom-XMLHttpRequest-withCredentials">withCredentials</code>