--- /dev/null
+/*
+ * Copyright (c) 2013 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.yangtools.yang.model.api.type;
+
+import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
+
+/**
+ * Interface for {@link TypeDefinition}s which can be restricted through a require-instance statement.
+ *
+ * @param <T> Concrete {@link TypeDefinition} subinterface
+ */
+public interface RequireInstanceRestrictedTypeDefinition<T extends TypeDefinition<T>> extends TypeDefinition<T> {
+ /**
+ * Returns true or false which represents argument of <code>require-instance</code> statement. This statement is
+ * the substatement of the <code>type</code> statement.
+ *
+ * @return boolean value which is true if the <code>require-instance</code> statement is true and vice versa
+ */
+ boolean requireInstance();
+}