--- /dev/null
+/*
+ * Copyright (c) 2019 PANTHEON.tech, s.r.o. 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.yangtools.yang.xpath.api;
+
+/**
+ * Common interface for {@link ResolvedQNameReferent} and {@link UnresolvedQNameReferent}, ensuring that only one of
+ * them is implemented by any class.
+ *
+ * @param <T> {@link QNameReferent} behavior subclass
+ */
+interface QNameReferentBehavior<T extends QNameReferentBehavior<T>> extends QNameReferent {
+
+}