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diff --git a/org.argeo.slc.core/src/org/argeo/slc/core/execution/generator/DefaultRunnableDataNode.java b/org.argeo.slc.core/src/org/argeo/slc/core/execution/generator/DefaultRunnableDataNode.java
new file mode 100644
index 000000000..daed350b2
--- /dev/null
+++ b/org.argeo.slc.core/src/org/argeo/slc/core/execution/generator/DefaultRunnableDataNode.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed 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.argeo.slc.core.execution.generator;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Default implementation of <code>RunnableDataNode</code>
+ *
+ */
+public class DefaultRunnableDataNode implements RunnableDataNode {
+
+	private List<RunnableDataNode> children = new ArrayList<RunnableDataNode>();
+	
+	private RunnableDataNode parent;
+	
+	/**
+	 * Data of the RunnableDataNode. Does not contain
+	 * parent data.
+	 */
+	private Map<String, Object> properData = new HashMap<String, Object>();
+	
+	private String path;
+	
+	private String beanName;
+
+	public boolean isLeaf() {
+		return children.size() == 0;
+	}
+	
+	public List<RunnableDataNode> getChildren() {
+		return children;
+	}
+
+	public void addChild(RunnableDataNode child) {
+		child.setParent(this);
+		children.add(child);
+	}
+	
+	public Map<String, Object> getData() {
+		Map<String, Object> data = new HashMap<String, Object>();
+		if(parent != null) {
+			Map<String, Object> parentData = parent.getData();
+			if(parentData != null) {
+				data.putAll(parentData);
+			}
+		}
+		// entries defined in parentData can be overridden
+		// in properData
+		if(properData != null) {
+			data.putAll(properData);
+		}
+		return data;
+	}
+
+	public Map<String, Object> getProperData() {
+		return properData;
+	}
+
+	public void setProperData(Map<String, Object> properData) {
+		this.properData = properData;
+	}
+
+	public String getPath() {
+		return path;
+	}
+
+	public void setPath(String path) {
+		this.path = path;
+	}
+
+	public String getBeanName() {
+		return beanName;
+	}
+
+	public void setBeanName(String beanName) {
+		this.beanName = beanName;
+	}
+
+	public void setParent(RunnableDataNode parent) {
+		this.parent = parent;
+	}
+
+	public RunnableDataNode getParent() {
+		return parent;
+	}
+
+}