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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *  http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17
    18  package org.apache.any23.vocab;
    19
    20  /**
    21   * Vocabulary definition for <a href="http://schema.org/">schema.org</a>.
    22   *
    23   * @author Michele Mostarda (mostarda@fbk.eu)
    24   */
    25  public class SchemaOrg extends Vocabulary {
    26
    27      /**
    28       * The namespace of the vocabulary as a string.
    29       */
    30      public static final String NS = "http://schema.org/";
    31
    32      private static SchemaOrg instance;
    33
    34      public static SchemaOrg getInstance() {
    35          if (instance == null) {
    36              instance = new SchemaOrg();
    37          }
    38          return instance;
    39      }
    40
    41      private SchemaOrg() {
    42          super(NS);
    43      }
    44
    45  }