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 */ 39 public static final String ARTICLE__MODIFIED_TIME = "article:modified_time"; 40 41 /** When the article is out of date after.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 }