diff --git a/rdf/content/src/nsIXULContent.h b/content/xul/content/public/nsIXULContent.h
similarity index 100%
rename from rdf/content/src/nsIXULContent.h
rename to content/xul/content/public/nsIXULContent.h
diff --git a/rdf/content/public/MANIFEST b/rdf/content/public/MANIFEST
index a5b10c0892e5..094c96e6fdc3 100644
--- a/rdf/content/public/MANIFEST
+++ b/rdf/content/public/MANIFEST
@@ -11,3 +11,4 @@ nsIXULKeyListener.h
 nsIXULPopupListener.h
 nsIXULPrototypeCache.h
 nsIXULPrototypeDocument.h
+nsIXULContent.h
diff --git a/rdf/content/public/Makefile.in b/rdf/content/public/Makefile.in
index 6ff20795c952..7d4733d9b648 100644
--- a/rdf/content/public/Makefile.in
+++ b/rdf/content/public/Makefile.in
@@ -42,6 +42,7 @@ EXPORTS		= \
 		nsIXULPopupListener.h \
 		nsIXULPrototypeCache.h \
 		nsIXULPrototypeDocument.h \
+    nsIXULContent.h \
 		$(NULL)
 
 EXPORTS		:= $(addprefix $(srcdir)/, $(EXPORTS))
diff --git a/rdf/content/public/makefile.win b/rdf/content/public/makefile.win
index 2f42ca016f31..587131a8e135 100644
--- a/rdf/content/public/makefile.win
+++ b/rdf/content/public/makefile.win
@@ -38,6 +38,7 @@ EXPORTS	= \
         nsIXULDocument.h                \
         nsIXULPrototypeCache.h          \
         nsIXULPrototypeDocument.h       \
+        nsIXULContent.h                 \
 	$(NULL)
 
 include <$(DEPTH)/config/rules.mak>
diff --git a/rdf/content/public/nsIXULContent.h b/rdf/content/public/nsIXULContent.h
new file mode 100644
index 000000000000..3c54e6f8ccb3
--- /dev/null
+++ b/rdf/content/public/nsIXULContent.h
@@ -0,0 +1,116 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is Mozilla Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ */
+
+/*
+
+  Private interface to XUL content.
+
+*/
+
+#ifndef nsIXULContent_h__
+#define nsIXULContent_h__
+
+#include "nsISupports.h"
+class nsIAtom;
+class nsString;
+
+// {39C5ECC0-5C47-11d3-BE36-00104BDE6048}
+#define NS_IXULCONTENT_IID \
+{ 0x39c5ecc0, 0x5c47, 0x11d3, { 0xbe, 0x36, 0x0, 0x10, 0x4b, 0xde, 0x60, 0x48 } }
+
+
+class nsIXULContent : public nsISupports
+{
+public:
+    static const nsIID& GetIID() { static nsIID iid = NS_IXULCONTENT_IID; return iid; }
+
+    /**
+     * Peek at a XUL element's child count without forcing children to be
+     * instantiated.
+     */
+    NS_IMETHOD PeekChildCount(PRInt32& aCount) const = 0;
+
+    /**
+     * These flags are used to maintain bookkeeping information for partially-
+     * constructed content.
+     *
+     *   eChildrenMustBeRebuilt
+     *     The element's children are invalid or unconstructed, and should
+     *     be reconstructed.
+     *
+     *   eTemplateContentsBuilt
+     *     Child content that is built from a XUL template has been
+     *     constructed. 
+     *
+     *   eContainerContentsBuilt
+     *     Child content that is built by following the ``containment''
+     *     property in a XUL template has been built.
+     */
+    enum {
+        eChildrenMustBeRebuilt  = 0x1,
+        eTemplateContentsBuilt  = 0x2,
+        eContainerContentsBuilt = 0x4
+    };
+
+    /**
+     * Get the element's anonymous state
+     */
+    NS_IMETHOD GetAnonymousState(PRBool& aState) = 0;
+
+    /**
+     * Mark an element as being anonymous or not.
+     */
+    NS_IMETHOD SetAnonymousState(PRBool aState) = 0;
+
+    /**
+     * Set one or more ``lazy state'' flags.
+     * @aFlags a mask of flags to set
+     */
+    NS_IMETHOD SetLazyState(PRInt32 aFlags) = 0;
+
+    /**
+     * Clear one or more ``lazy state'' flags.
+     * @aFlags a mask of flags to clear
+     */
+    NS_IMETHOD ClearLazyState(PRInt32 aFlags) = 0;
+
+    /**
+     * Get the value of a single ``lazy state'' flag.
+     * @aFlag a flag to test
+     * @aResult the result
+     */
+    NS_IMETHOD GetLazyState(PRInt32 aFlag, PRBool& aResult) = 0;
+
+    /**
+     * Add a script event listener to the element.
+     */
+    NS_IMETHOD AddScriptEventListener(nsIAtom* aName, const nsString& aValue, REFNSIID aIID) = 0;
+
+    /**
+     * Evil rotten hack to make mailnews work. They assume that we
+     * keep a reference to their resource objects. If you think you
+     * should call this method, think again. You shouldn't.
+     */
+    NS_IMETHOD ForceElementToOwnResource(PRBool aForce) = 0;
+};
+
+#endif // nsIXULContent_h__