Merge pull request #1250 from eclipse/issues/GH-1113-shacl-api

GH-1113 added shared constant vocabulary for SHACL shape graph

model/src/main/java/org/eclipse/rdf4j/model/vocabulary/RDF4J.java

@@ -0,0 +1,44 @@
+/*******************************************************************************
+ * Copyright (c) 2019 Eclipse RDF4J contributors.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Distribution License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ *******************************************************************************/
+package org.eclipse.rdf4j.model.vocabulary;
+
+import org.eclipse.rdf4j.model.IRI;
+import org.eclipse.rdf4j.model.Namespace;
+import org.eclipse.rdf4j.model.impl.SimpleNamespace;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+
+/**
+ * Defines constants for the RDF4J namespace. These constants include things like implementation-specific
+ * named graph identifiers or properties.
+ * 
+ * @author Jeen Broekstra
+ */
+public class RDF4J {
+
+	/**
+	 * The RDF4J namespace ( <tt>http://rdf4j.org/schema/rdf4j#</tt>).
+	 */
+	public static final String NAMESPACE = "http://rdf4j.org/schema/rdf4j#";
+
+	/**
+	 * Recommended prefix for the RDF4J namespace: "rdf4j"
+	 */
+	public static final String PREFIX = "rdf4j";
+
+	/**
+	 * An immutable {@link Namespace} constant that represents the RDF4J namespace.
+	 */
+	public static final Namespace NS = new SimpleNamespace(PREFIX, NAMESPACE);
+
+	/**
+	 * Context identifier for persisting SHACL shape data in the {@link ShaclSail}.
+	 * <tt>http://rdf4j.org/schema/rdf4j#SHACLShapeGraph</tt>
+	 */
+	public final static IRI SHACL_SHAPE_GRAPH = SimpleValueFactory.getInstance().createIRI(NAMESPACE,
+			"SHACLShapeGraph");
+}