content: /*
   * 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.
   */
  
  /**
   * RDD-based machine learning APIs (in maintenance mode).
   *
   * The <code>spark.mllib</code> package is in maintenance mode as of the Spark 2.0.0 release to
   * encourage migration to the DataFrame-based APIs under the <code>spark.ml</code> package.
   * While in maintenance mode,
   * <ul>
   *   <li>
   *     no new features in the RDD-based <code>spark.mllib</code> package will be accepted, unless
   *     they block implementing new features in the DataFrame-based <code>spark.ml</code> package;
   *   </li>
   *   <li>
   *     bug fixes in the RDD-based APIs will still be accepted.
   *   </li>
   * </ul>
   *
   * The developers will continue adding more features to the DataFrame-based APIs in the 2.x series
   * to reach feature parity with the RDD-based APIs.
   * And once we reach feature parity, this package will be deprecated.
   *
   * @see <a href="https://issues.apache.org/jira/browse/SPARK-4591" target="_blank">SPARK-4591</a> to
   *      track the progress of feature parity
   */
  package org.apache.spark.mllib;
  