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diff --git a/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/md/sal/dom/api/DOMExtensibleService.java b/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/md/sal/dom/api/DOMExtensibleService.java
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+++ b/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/md/sal/dom/api/DOMExtensibleService.java
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+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.md.sal.dom.api;
+
+import com.google.common.annotations.Beta;
+import java.util.Map;
+import javax.annotation.Nonnull;
+
+/**
+ * Marker interface for services which can support {@link DOMServiceExtension}.
+ * Aside for marking these, they also provide runtime query to detect whether
+ * a particular trait is in fact available.
+ *
+ * <T> Base {@link DOMService}
+ * <E> Extension type
+ */
+@Beta
+public interface DOMExtensibleService<T extends DOMExtensibleService<T, E>, E extends DOMServiceExtension<T, E>> extends DOMService {
+    /**
+     * Return a map of currently-supported extensions, along with accessor services
+     * which provide access to the specific functionality bound to this service.
+     *
+     * @return A map of supported functionality.
+     */
+    @Nonnull Map<Class<? extends E>, E> getSupportedExtensions();
+}