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diff --git a/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/model/SingleJcrNodeElem.java b/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/model/SingleJcrNodeElem.java
new file mode 100644
index 000000000..7b588f83b
--- /dev/null
+++ b/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/model/SingleJcrNodeElem.java
@@ -0,0 +1,108 @@
+/*
+ * 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.jcr.ui.explorer.model;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+import javax.jcr.RepositoryException;
+import javax.jcr.Workspace;
+
+import org.argeo.ArgeoException;
+import org.argeo.eclipse.ui.TreeParent;
+
+/**
+ * UI Tree component. Wraps a node of a JCR {@link Workspace}. It also keeps a
+ * reference to its parent node that can either be a {@link WorkspaceElem}, a
+ * {@link SingleJcrNodeElem} or null if the node is "mounted" as the root of the UI
+ * tree.
+ */
+
+public class SingleJcrNodeElem extends TreeParent {
+
+	private final Node node;
+	private String alias = null;
+
+	// keeps a local reference to the node's name to avoid exception when the
+	// session is lost
+	// private final String name;
+
+	/** Creates a new UiNode in the UI Tree */
+	public SingleJcrNodeElem(TreeParent parent, Node node, String name) {
+		super(name);
+		setParent(parent);
+		this.node = node;
+	}
+
+	/**
+	 * Creates a new UiNode in the UI Tree, keeping a reference to the alias of
+	 * the corresponding repository in the current UI environment. It is useful
+	 * to be able to mount nodes as roots of the UI tree.
+	 */
+	public SingleJcrNodeElem(TreeParent parent, Node node, String name, String alias) {
+		super(name);
+		setParent(parent);
+		this.node = node;
+		this.alias = alias;
+	}
+
+	/** returns the node wrapped by the current Ui object */
+	public Node getNode() {
+		return node;
+	}
+
+	protected String getRepositoryAlias() {
+		return alias;
+	}
+
+	/**
+	 * Override normal behavior to initialize children only when first requested
+	 */
+	@Override
+	public synchronized Object[] getChildren() {
+		if (isLoaded()) {
+			return super.getChildren();
+		} else {
+			// initialize current object
+			try {
+				NodeIterator ni = node.getNodes();
+				while (ni.hasNext()) {
+					Node curNode = ni.nextNode();
+					addChild(new SingleJcrNodeElem(this, curNode, curNode.getName()));
+				}
+				return super.getChildren();
+			} catch (RepositoryException re) {
+				throw new ArgeoException(
+						"Unexcpected error while initializing children SingleJcrNode",
+						re);
+			}
+		}
+	}
+
+	@Override
+	public boolean hasChildren() {
+		try {
+			if (node.getSession().isLive())
+				return node.hasNodes();
+			else
+				return false;
+		} catch (RepositoryException re) {
+			throw new ArgeoException(
+					"Unexpected error while checking children node existence",
+					re);
+		}
+	}
+
+}