### Eclipse Workspace Patch 1.0
#P oak-jcr
Index: src/main/java/org/apache/jackrabbit/oak/jcr/observation/ChangeProcessor.java
===================================================================
--- src/main/java/org/apache/jackrabbit/oak/jcr/observation/ChangeProcessor.java	(revision 1364941)
+++ src/main/java/org/apache/jackrabbit/oak/jcr/observation/ChangeProcessor.java	(working copy)
@@ -33,6 +33,7 @@
 import org.apache.jackrabbit.oak.spi.state.ChildNodeEntry;
 import org.apache.jackrabbit.oak.spi.state.NodeState;
 import org.apache.jackrabbit.oak.spi.state.NodeStateDiff;
+import org.apache.jackrabbit.oak.spi.state.NodeStateUtils;
 
 import com.google.common.base.Function;
 import com.google.common.collect.Iterators;
@@ -128,6 +129,9 @@
 
         @Override
         public void childNodeAdded(String name, NodeState after) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (!stopped && filterRef.get().includeChildren(jcrPath())) {
                 Iterator<Event> events = generateNodeEvents(Event.NODE_ADDED, path, name, after);
                 this.events.add(events);
@@ -139,6 +143,9 @@
 
         @Override
         public void childNodeDeleted(String name, NodeState before) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (!stopped && filterRef.get().includeChildren(jcrPath())) {
                 Iterator<Event> events = generateNodeEvents(Event.NODE_REMOVED, path, name, before);
                 this.events.add(events);
@@ -147,6 +154,9 @@
 
         @Override
         public void childNodeChanged(String name, NodeState before, NodeState after) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (!stopped && filterRef.get().includeChildren(jcrPath())) {
                 EventGeneratingNodeStateDiff diff = new EventGeneratingNodeStateDiff(
                         PathUtils.concat(path, name), events, after);
#P oak-core
Index: src/main/java/org/apache/jackrabbit/oak/spi/state/NodeStateUtils.java
===================================================================
--- src/main/java/org/apache/jackrabbit/oak/spi/state/NodeStateUtils.java	(revision 0)
+++ src/main/java/org/apache/jackrabbit/oak/spi/state/NodeStateUtils.java	(revision 0)
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.jackrabbit.oak.spi.state;
+
+import org.apache.jackrabbit.oak.commons.PathUtils;
+
+/**
+ * Utility method for code that deals with node states.
+ */
+public class NodeStateUtils {
+
+    /**
+     * Check whether the node or property with the given name is hidden, that
+     * is, if the node name starts with a ":".
+     *
+     * @param name the (absolute or relative) node or property name
+     * @return true if the item is hidden
+     */
+    public static boolean isHidden(String name) {
+        return PathUtils.getName(name).startsWith(":");
+    }
+
+}
Index: src/main/java/org/apache/jackrabbit/oak/spi/commit/ValidatingEditor.java
===================================================================
--- src/main/java/org/apache/jackrabbit/oak/spi/commit/ValidatingEditor.java	(revision 1364941)
+++ src/main/java/org/apache/jackrabbit/oak/spi/commit/ValidatingEditor.java	(working copy)
@@ -20,6 +20,7 @@
 import org.apache.jackrabbit.oak.api.PropertyState;
 import org.apache.jackrabbit.oak.spi.state.NodeState;
 import org.apache.jackrabbit.oak.spi.state.NodeStateDiff;
+import org.apache.jackrabbit.oak.spi.state.NodeStateUtils;
 import org.apache.jackrabbit.oak.spi.state.NodeStore;
 
 import static org.apache.jackrabbit.oak.plugins.memory.MemoryNodeState.EMPTY_NODE;
@@ -127,6 +128,9 @@
 
         @Override
         public void childNodeAdded(String name, NodeState after) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (exception == null) {
                 try {
                     Validator v = validator.childNodeAdded(name, after);
@@ -142,6 +146,9 @@
         @Override
         public void childNodeChanged(
                 String name, NodeState before, NodeState after) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (exception == null) {
                 try {
                     Validator v =
@@ -157,6 +164,9 @@
 
         @Override
         public void childNodeDeleted(String name, NodeState before) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (exception == null) {
                 try {
                     Validator v = validator.childNodeDeleted(name, before);
Index: src/main/java/org/apache/jackrabbit/oak/plugins/lucene/LuceneEditor.java
===================================================================
--- src/main/java/org/apache/jackrabbit/oak/plugins/lucene/LuceneEditor.java	(revision 1364941)
+++ src/main/java/org/apache/jackrabbit/oak/plugins/lucene/LuceneEditor.java	(working copy)
@@ -27,6 +27,7 @@
 import org.apache.jackrabbit.oak.spi.state.ChildNodeEntry;
 import org.apache.jackrabbit.oak.spi.state.NodeState;
 import org.apache.jackrabbit.oak.spi.state.NodeStateDiff;
+import org.apache.jackrabbit.oak.spi.state.NodeStateUtils;
 import org.apache.jackrabbit.oak.spi.state.NodeStore;
 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.analysis.standard.StandardAnalyzer;
@@ -123,6 +124,9 @@
 
         @Override
         public void childNodeAdded(String name, NodeState after) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (exception == null) {
                 try {
                     addSubtree(path + "/" + name, after);
@@ -135,6 +139,9 @@
         @Override
         public void childNodeChanged(
                 String name, NodeState before, NodeState after) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (exception == null) {
                 try {
                     LuceneDiff diff = new LuceneDiff(writer, path + "/" + name);
@@ -148,6 +155,9 @@
 
         @Override
         public void childNodeDeleted(String name, NodeState before) {
+            if (NodeStateUtils.isHidden(name)) {
+                return;
+            }
             if (exception == null) {
                 try {
                     deleteSubtree(path + "/" + name, before);
Index: src/main/java/org/apache/jackrabbit/oak/core/MergingNodeStateDiff.java
===================================================================
--- src/main/java/org/apache/jackrabbit/oak/core/MergingNodeStateDiff.java	(revision 1364941)
+++ src/main/java/org/apache/jackrabbit/oak/core/MergingNodeStateDiff.java	(working copy)
@@ -22,6 +22,7 @@
 import org.apache.jackrabbit.oak.spi.state.ChildNodeEntry;
 import org.apache.jackrabbit.oak.spi.state.NodeState;
 import org.apache.jackrabbit.oak.spi.state.NodeStateDiff;
+import org.apache.jackrabbit.oak.spi.state.NodeStateUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -131,6 +132,9 @@
 
     @Override
     public void childNodeAdded(String name, NodeState after) {
+        if (NodeStateUtils.isHidden(name)) {
+            return;
+        }
         ConflictHandler.Resolution resolution;
         TreeImpl n = target.getChild(name);
 
@@ -153,6 +157,9 @@
 
     @Override
     public void childNodeChanged(String name, NodeState before, NodeState after) {
+        if (NodeStateUtils.isHidden(name)) {
+            return;
+        }
         ConflictHandler.Resolution resolution;
         TreeImpl n = target.getChild(name);
 
@@ -176,6 +183,9 @@
 
     @Override
     public void childNodeDeleted(String name, NodeState before) {
+        if (NodeStateUtils.isHidden(name)) {
+            return;
+        }
         ConflictHandler.Resolution resolution;
         TreeImpl n = target.getChild(name);