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diff --git a/src/org/apache/http/HttpVersion.java b/src/org/apache/http/HttpVersion.java
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+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/HttpVersion.java $
+ * $Revision: 609106 $
+ * $Date: 2008-01-05 01:15:42 -0800 (Sat, 05 Jan 2008) $
+ *
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http;
+
+import java.io.Serializable;
+
+/**
+ * Represents an HTTP version, as specified in RFC 2616.
+ * 
+ * @author <a href="mailto:oleg@ural.ru">Oleg Kalnichevski</a>
+ * 
+ * @version $Revision: 609106 $ $Date: 2008-01-05 01:15:42 -0800 (Sat, 05 Jan 2008) $
+ */
+public final class HttpVersion extends ProtocolVersion
+    implements Serializable {
+
+    private static final long serialVersionUID = -5856653513894415344L;
+
+    /** The protocol name. */
+    public static final String HTTP = "HTTP";
+    
+    /** HTTP protocol version 0.9 */
+    public static final HttpVersion HTTP_0_9 = new HttpVersion(0, 9);  
+
+    /** HTTP protocol version 1.0 */
+    public static final HttpVersion HTTP_1_0 = new HttpVersion(1, 0);  
+
+    /** HTTP protocol version 1.1 */
+    public static final HttpVersion HTTP_1_1 = new HttpVersion(1, 1);  
+
+    
+    /**
+     * Create an HTTP protocol version designator.
+     *
+     * @param major   the major version number of the HTTP protocol
+     * @param minor   the minor version number of the HTTP protocol
+     * 
+     * @throws IllegalArgumentException if either major or minor version number is negative
+     */
+    public HttpVersion(int major, int minor) {
+        super(HTTP, major, minor);
+    }
+
+
+    /**
+     * Obtains a specific HTTP version.
+     *
+     * @param major     the major version
+     * @param minor     the minor version
+     *
+     * @return  an instance of {@link HttpVersion} with the argument version
+     */
+    public ProtocolVersion forVersion(int major, int minor) {
+
+        if ((major == this.major) && (minor == this.minor)) {
+            return this;
+        }
+
+        if (major == 1) {
+            if (minor == 0) {
+                return HTTP_1_0;
+            }
+            if (minor == 1) {
+                return HTTP_1_1;
+            }
+        }
+        if ((major == 0) && (minor == 9)) {
+            return HTTP_0_9;
+        }
+
+        // argument checking is done in the constructor
+        return new HttpVersion(major, minor);
+    }
+
+}