diff --git a/lib/dtds/connector_1_6.dtd b/lib/dtds/connector_1_6.dtd
index 9bf099075..9aacf93ea 100644
--- a/lib/dtds/connector_1_6.dtd
+++ b/lib/dtds/connector_1_6.dtd
@@ -2,33 +2,15 @@
- DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- 
- Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
- 
- The contents of this file are subject to the terms of either the GNU
- General Public License Version 2 only ("GPL") or the Common Development
- and Distribution License("CDDL") (collectively, the "License").  You
- may not use this file except in compliance with the License. You can obtain
- a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
- or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
- language governing permissions and limitations under the License.
- 
- When distributing the software, include this License Header Notice in each
- file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
- Sun designates this particular file as subject to the "Classpath" exception
- as provided by Sun in the GPL Version 2 section of the License file that
- accompanied this code.  If applicable, add the following below the License
- Header, with the fields enclosed by brackets [] replaced by your own
- identifying information: "Portions Copyrighted [year]
- [name of copyright owner]"
- 
- Contributor(s):
- 
- If you wish your version of this file to be governed by only the CDDL or
- only the GPL Version 2, indicate your decision by adding "[Contributor]
- elects to include this software in this distribution under the [CDDL or GPL
- Version 2] license."  If you don't indicate a single choice of license, a
- recipient has the option to distribute your version of this file under
- either the CDDL, the GPL Version 2 or to extend the choice of license to
- its licensees as provided above.  However, if you add GPL Version 2 code
- and therefore, elected the GPL Version 2 license, then the option applies
- only if the new code is made subject to such option by the copyright
- holder.
+
+    Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
+
+    This program and the accompanying materials are made available under the
+    terms of the Eclipse Public License v. 2.0, which is available at
+    http://www.eclipse.org/legal/epl-2.0.
+
+    This Source Code may also be made available under the following Secondary
+    Licenses when the conditions for such availability set forth in the
+    Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
+    version 2 with the GNU Classpath Exception, which is available at
+    https://www.gnu.org/software/classpath/license.html.
+
+    SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0