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diff --git a/org.argeo.jcr.ui.explorer/src/org/argeo/jcr/ui/explorer/model/RepositoriesElem.java b/org.argeo.jcr.ui.explorer/src/org/argeo/jcr/ui/explorer/model/RepositoriesElem.java
new file mode 100644
index 000000000..b123727bc
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+++ b/org.argeo.jcr.ui.explorer/src/org/argeo/jcr/ui/explorer/model/RepositoriesElem.java
@@ -0,0 +1,134 @@
+/*
+ * 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 java.util.Map;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+import javax.jcr.Repository;
+import javax.jcr.RepositoryException;
+import javax.jcr.RepositoryFactory;
+import javax.jcr.Session;
+
+import org.argeo.ArgeoException;
+import org.argeo.eclipse.ui.ErrorFeedback;
+import org.argeo.eclipse.ui.TreeParent;
+import org.argeo.jcr.ArgeoNames;
+import org.argeo.jcr.MaintainedRepository;
+import org.argeo.jcr.RepositoryRegister;
+import org.argeo.jcr.UserJcrUtils;
+import org.argeo.util.security.Keyring;
+
+/**
+ * UI Tree component. Implements the Argeo abstraction of a
+ * {@link RepositoryFactory} that enable a user to "mount" various repositories
+ * in a single Tree like View. It is usually meant to be at the root of the UI
+ * Tree and thus {@link getParent()} method will return null.
+ * 
+ * The {@link RepositoryFactory} is injected at instantiation time and must be
+ * use get or register new {@link Repository} objects upon which a reference is
+ * kept here.
+ */
+
+public class RepositoriesElem extends TreeParent implements ArgeoNames {
+	private final RepositoryRegister repositoryRegister;
+	private final RepositoryFactory repositoryFactory;
+
+	/**
+	 * A session of the logged in user on the default workspace of the node
+	 * repository.
+	 */
+	private final Session userSession;
+	private final Keyring keyring;
+
+	public RepositoriesElem(String name, RepositoryRegister repositoryRegister,
+			RepositoryFactory repositoryFactory, TreeParent parent,
+			Session userSession, Keyring keyring) {
+		super(name);
+		this.repositoryRegister = repositoryRegister;
+		this.repositoryFactory = repositoryFactory;
+		this.userSession = userSession;
+		this.keyring = keyring;
+	}
+
+	/**
+	 * Override normal behavior to initialize the various repositories only at
+	 * request time
+	 */
+	@Override
+	public synchronized Object[] getChildren() {
+		if (isLoaded()) {
+			return super.getChildren();
+		} else {
+			// initialize current object
+			Map<String, Repository> refRepos = repositoryRegister
+					.getRepositories();
+			for (String name : refRepos.keySet()) {
+				Repository repository = refRepos.get(name);
+				if (repository instanceof MaintainedRepository)
+					super.addChild(new MaintainedRepositoryElem(name,
+							repository, this));
+				else
+					super.addChild(new RepositoryElem(name, repository, this));
+			}
+
+			// remote
+			if (keyring != null) {
+				try {
+					addRemoteRepositories(keyring);
+				} catch (RepositoryException e) {
+					throw new ArgeoException(
+							"Cannot browse remote repositories", e);
+				}
+			}
+			return super.getChildren();
+		}
+	}
+
+	protected void addRemoteRepositories(Keyring jcrKeyring)
+			throws RepositoryException {
+		Node userHome = UserJcrUtils.getUserHome(userSession);
+		if (userHome != null && userHome.hasNode(ARGEO_REMOTE)) {
+			NodeIterator it = userHome.getNode(ARGEO_REMOTE).getNodes();
+			while (it.hasNext()) {
+				Node remoteNode = it.nextNode();
+				String uri = remoteNode.getProperty(ARGEO_URI).getString();
+				try {
+					RemoteRepositoryElem remoteRepositoryNode = new RemoteRepositoryElem(
+							remoteNode.getName(), repositoryFactory, uri, this,
+							userSession, jcrKeyring, remoteNode.getPath());
+					super.addChild(remoteRepositoryNode);
+				} catch (Exception e) {
+					ErrorFeedback.show("Cannot add remote repository "
+							+ remoteNode, e);
+				}
+			}
+		}
+	}
+
+	public void registerNewRepository(String alias, Repository repository) {
+		// TODO: implement this
+		// Create a new RepositoryNode Object
+		// add it
+		// super.addChild(new RepositoriesNode(...));
+	}
+
+	/** Returns the {@link RepositoryRegister} wrapped by this object. */
+	public RepositoryRegister getRepositoryRegister() {
+		return repositoryRegister;
+	}
+}