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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  import org.eclipse.rdf4j.model.IRI;
21  
22  /**
23   * The <a href="http://ogp.me/">Open Graph Protocol Article Type</a> vocabulary.
24   */
25  public class OGPArticle extends Vocabulary {
26  
27      private OGPArticle() {
28          super(NS);
29      }
30  
31      public static final String NS = "http://ogp.me/ns/article#";
32  
33      /* BEGIN: http://ogp.me/#type_article */
34  
35      /** When the article was first published. */
36      public static final String ARTICLE__PUBLISHED_TIME = "article:published_time";
37  
38      /** When the article was last changed. */
39      public static final String ARTICLE__MODIFIED_TIME = "article:modified_time";
40  
41      /** When the article is out of date after. */
42      public static final String ARTICLE__EXPIRATION_TIME = "article:expiration_time";
43  
44      /** Writers of the article. */
45      public static final String ARTICLE__AUTHOR = "article:author";
46  
47      /** A high-level section name. E.g. Technology */
48      public static final String ARTICLE__SECTION = "article:section";
49  
50      /** Tag words associated with this article. */
51      public static final String ARTICLE__TAG = "article:tag";
52  
53      /* END: http://ogp.me/#type_article */
54  
55      private static OGPArticle instance;
56  
57      public static OGPArticle getInstance() {
58          if (instance == null) {
59              instance = new OGPArticle();
60          }
61          return instance;
62      }
63  
64      public final IRI NAMESPACE = createIRI(NS);
65  
66      public final IRI articlePublishedTime = createProperty(ARTICLE__PUBLISHED_TIME);
67      public final IRI articleModifiedTime = createProperty(ARTICLE__MODIFIED_TIME);
68      public final IRI articleExpirationTime = createProperty(ARTICLE__EXPIRATION_TIME);
69      public final IRI articleAuthor = createProperty(ARTICLE__AUTHOR);
70      public final IRI articleSection = createProperty(ARTICLE__SECTION);
71      public final IRI articleTag = createProperty(ARTICLE__TAG);
72  
73      @SuppressWarnings("unused")
74      private IRI createClass(String localName) {
75          return createClass(NS, localName);
76      }
77  
78      private IRI createProperty(String localName) {
79          return createProperty(NS, localName);
80      }
81  
82  }