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.
   */
  
  /**
   * The classes in this package are used for implementing custom value types.
   *
   * <p>
   *     <b>NOTE THAT</b> in addition to implementing the interfaces here, it is also necessary to provide appropriate
   *   components for Wicket viewer to edit the values and to implement the appropriate SPI/extension points so that
   *   DataNucleus can persist the objects to the database.
   * </p>
   *
   *
   * <p>
   * The {@link org.apache.causeway.applib.value.semantics.ValueSemanticsProvider} interface
   * allows the framework to recognize its corresponding type as being a value
   * type (that is, having value semantics).  The {@link org.apache.causeway.applib.value.semantics.ValueSemanticsAbstract}
   * class is an base adapter for this interface.
   *
   * <p>
   * The association between {@link org.apache.causeway.applib.value.semantics.ValueSemanticsProvider}
   * and its corresponding type can be done in several ways.  Most straightforward
   * is to annotate the class with the {@link org.apache.causeway.applib.annotation.Value}
   * annotation.  However, if the value type source code cannot be modified (for
   * example, if it is a third-party type such as joda-time), then the association
   * can be made using configuration properties.
   *
   * @deprecated
   */
  package org.apache.causeway.applib.value.semantics;