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diff --git a/plugins/org.eclipse.bpmn2.modeler.core/src/org/eclipse/bpmn2/modeler/core/IBpmn2RuntimeExtension.java b/plugins/org.eclipse.bpmn2.modeler.core/src/org/eclipse/bpmn2/modeler/core/IBpmn2RuntimeExtension.java
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+++ b/plugins/org.eclipse.bpmn2.modeler.core/src/org/eclipse/bpmn2/modeler/core/IBpmn2RuntimeExtension.java
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+/*******************************************************************************
+ * Copyright (c) 2011, 2012 Red Hat, Inc.
+ *  All rights reserved.
+ * This program is made available under the terms of the
+ * Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Red Hat, Inc. - initial API and implementation
+ *
+ * @author Bob Brodt
+ ******************************************************************************/
+package org.eclipse.bpmn2.modeler.core;
+
+import org.eclipse.bpmn2.modeler.core.utils.ModelUtil.Bpmn2DiagramType;
+import org.eclipse.ui.IEditorInput;
+
+/**
+ * Interface that defines certain behavior of a Target Runtime specialization
+ * that must be implemented by a contributing plug-in.
+ */
+public interface IBpmn2RuntimeExtension {
+
+	/**
+	 * Check if the given input file is specific to the Target Runtime. The
+	 * implementation should check for specific extensions and namespaces that
+	 * identify the file for this runtime.
+	 * 
+	 * @param input
+	 *            the editor input object instance. This is created and passed
+	 *            to the BPMN2 editor by the Eclipse framework.
+	 * @return true if the file is targeted for this runtime, false if the file
+	 *         is generic BPMN 2.0 or belongs to some other Target Runtime.
+	 */
+	public boolean isContentForRuntime(IEditorInput input);
+
+	/**
+	 * Return the target namespace defined by this Target Runtime for the given
+	 * diagram type.
+	 * 
+	 * @param diagramType
+	 *            one of the pre-defined Diagram Types. The Target Runtime may
+	 *            use different namespace URIs for different Diagram Types.
+	 * @return a targetNamespace URI
+	 */
+	public String getTargetNamespace(Bpmn2DiagramType diagramType);
+
+	/**
+	 * Used to notify the Target Runtime of BPMN2 editor lifecycle events.
+	 *
+	 * @param event
+	 *            an event object sent by the BPMN2 editor framework.
+	 */
+	public void notify(LifecycleEvent event);
+}