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+<?xml version="1.0"?>
+<!--
+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.
+-->
+<document>
+ <properties>
+  <title>Building</title>
+  <author email="dev@commons.apache.org">Commons Documentation Team</author>
+ </properties>
+<body>
+<!-- ================================================== -->
+<section name="Overview">
+<p>
+  Commons Lang uses <a href="https://maven.apache.org">Maven</a>.
+</p>
+<p>
+  You may also be interested in the upgrade notes:
+</p>
+<ul>
+  <li>Upgrade from 2.6 to 3.0 - <a href="upgradeto3_0.html">Lang 3.0 Release Notes</a></li>
+  <li>Upgrade from 2.5 to 2.6 - <a href="upgradeto2_6.html">Lang 2.6 Release Notes</a></li>
+  <li>Upgrade from 2.4 to 2.5 - <a href="upgradeto2_5.html">Lang 2.5 Release Notes</a></li>
+  <li>Upgrade from 2.3 to 2.4 - <a href="upgradeto2_4.html">Lang 2.4 Release Notes</a></li>
+  <li>Upgrade from 2.2 to 2.3 - <a href="upgradeto2_3.html">Lang 2.3 Release Notes</a></li>
+  <li>Upgrade from 2.1 to 2.2 - <a href="upgradeto2_2.html">Lang 2.2 Release Notes</a></li>
+  <li>Upgrade from 2.0 to 2.1 - <a href="upgradeto2_1.html">Lang 2.1 Release Notes</a></li>
+  <li>Upgrade from 1.0 to 2.0 - <a href="upgradeto2_0.html">Lang 2.0 Release Notes</a></li>
+</ul>
+</section>
+<!-- ================================================== -->
+<section name="Maven Goals">
+  <p>
+    To build a jar file, change into the root directory of Lang and run "mvn package".
+    The result will be in the "target" subdirectory.
+  </p>
+  <p>
+    To build the full website, run "mvn site".
+    The result will be in "target/site".
+    You must be online to successfully complete this target.
+  </p>
+  <p>
+    Further details can be found in the
+    <a href="https://commons.apache.org/building.html">commons build instructions</a>.
+  </p>
+</section>
+<!-- ================================================== -->
+<section name="Ant Goals">
+  <p>
+    To build a jar file, change into the root directory of Lang and run "ant jar".
+    The result will be in the "target" subdirectory.
+  </p>
+  <p>
+    To build the Javadocs, run "ant javadoc".
+    The result will be in "target/docs/api".
+  </p>
+</section>
+<!-- ================================================== -->
+</body>
+</document>