001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.jena;
014
015import org.apache.juneau.serializer.*;
016
017/**
018 * Constants used by the {@link RdfSerializer} and {@link RdfParser} classes.
019 */
020public final class Constants {
021
022   //--------------------------------------------------------------------------------
023   // Built-in Jena languages.
024   //--------------------------------------------------------------------------------
025
026   /** Jena language support: <js>"RDF/XML"</js>.*/
027   public static final String LANG_RDF_XML = "RDF/XML";
028
029   /** Jena language support: <js>"RDF/XML-ABBREV"</js>.*/
030   public static final String LANG_RDF_XML_ABBREV = "RDF/XML-ABBREV";
031
032   /** Jena language support: <js>"N-TRIPLE"</js>.*/
033   public static final String LANG_NTRIPLE = "N-TRIPLE";
034
035   /** Jena language support: <js>"TURTLE"</js>.*/
036   public static final String LANG_TURTLE = "TURTLE";
037
038   /** Jena language support: <js>"N3"</js>.*/
039   public static final String LANG_N3 = "N3";
040
041
042   //--------------------------------------------------------------------------------
043   // Built-in Juneau properties.
044   //--------------------------------------------------------------------------------
045
046   /**
047    * RDF property identifier <js>"items"</js>.
048    * 
049    * <p>
050    * For resources that are collections, this property identifies the RDF Sequence container for the items in the 
051    * collection.
052    */
053   public static final String RDF_juneauNs_ITEMS = "items";
054
055   /**
056    * RDF property identifier <js>"root"</js>.
057    * 
058    * <p>
059    * Property added to root nodes to help identify them as root elements during parsing.
060    * 
061    * <p>
062    * Added if {@link RdfSerializer#RDF_addRootProperty} setting is enabled.
063    */
064   public static final String RDF_juneauNs_ROOT = "root";
065
066   /**
067    * RDF property identifier <js>"class"</js>.
068    * 
069    * <p>
070    * Property added to bean resources to identify the class type.
071    * 
072    * <p>
073    * Added if {@link Serializer#SERIALIZER_addBeanTypeProperties} setting is enabled.
074    */
075   public static final String RDF_juneauNs_TYPE = "_type";
076
077   /**
078    * RDF property identifier <js>"value"</js>.
079    * 
080    * <p>
081    * Property added to nodes to identify a simple value.
082    */
083   public static final String RDF_juneauNs_VALUE = "value";
084
085   /**
086    * RDF resource that identifies a <jk>null</jk> value.
087    */
088   public static final String RDF_NIL = "http://www.w3.org/1999/02/22-rdf-syntax-ns#nil";
089
090   /**
091    * RDF resource that identifies a <code>Seq</code> value.
092    */
093   public static final String RDF_SEQ = "http://www.w3.org/1999/02/22-rdf-syntax-ns#Seq";
094
095   /**
096    * RDF resource that identifies a <code>Bag</code> value.
097    */
098   public static final String RDF_BAG = "http://www.w3.org/1999/02/22-rdf-syntax-ns#Bag";
099}