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diff --git a/dom/xul/templates/nsRDFTestNode.h b/dom/xul/templates/nsRDFTestNode.h
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsRDFTestNode_h__
+#define nsRDFTestNode_h__
+
+#include "nsRuleNetwork.h"
+
+class nsIRDFResource;
+class nsIRDFNode;
+
+/**
+ * An abstract base class for all of the RDF-related tests. This interface
+ * allows us to iterate over all of the RDF tests to find the one in the
+ * network that is apropos for a newly-added assertion.
+ */
+class nsRDFTestNode : public TestNode
+{
+public:
+ explicit nsRDFTestNode(TestNode* aParent)
+ : TestNode(aParent) {}
+
+ /**
+ * Determine whether the node can propagate an assertion
+ * with the specified source, property, and target. If the
+ * assertion can be propagated, aInitialBindings will be
+ * initialized with appropriate variable-to-value assignments
+ * to allow the rule network to start a constrain and propagate
+ * search from this node in the network.
+ *
+ * @return true if the node can propagate the specified
+ * assertion.
+ */
+ virtual bool CanPropagate(nsIRDFResource* aSource,
+ nsIRDFResource* aProperty,
+ nsIRDFNode* aTarget,
+ Instantiation& aInitialBindings) const = 0;
+
+ /**
+ *
+ */
+ virtual void Retract(nsIRDFResource* aSource,
+ nsIRDFResource* aProperty,
+ nsIRDFNode* aTarget) const = 0;
+};
+
+#endif // nsRDFTestNode_h__