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Apache Clerezza API implements the RDF data model as defined by http://www.w3.org/TR/rdf11-concepts/

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/*
 * 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.
 */
package org.apache.clerezza;

/**
 * A Blank Node represents a resource,
 * but does not indicate a URI for the resource. Blank nodes act like
 * existentially qualified variables in first order logic.
 * 
 * An RDF-1.1
 * Blank Node, as defined by RDF-1.1 Concepts
 * and Abstract Syntax, a W3C Recommendation published on 25 February 2014.

 * 
 * Note that: Blank nodes are disjoint from IRIs and literals. Otherwise,
 * the set of possible blank nodes is arbitrary. RDF makes no reference to any
 * internal structure of blank nodes.
 *
 * @see RDF-1.1
 * Blank Node
 */
public class BlankNode implements BlankNodeOrIRI {

}