--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/DefaultTreeContext.java	Tue Dec 13 18:23:49 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/DefaultTreeContext.java	Tue Dec 13 20:30:01 2016 +0900
@@ -37,7 +37,7 @@
 
     @Override
     public TreeNode getUnDefineNode(){
-        return null; // no use
+        return null; // not use
     }
 
     @Override

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/DifferenceTreeContext.java	Tue Dec 13 18:23:49 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/DifferenceTreeContext.java	Tue Dec 13 20:30:01 2016 +0900
@@ -14,13 +14,14 @@
  */
 public class DifferenceTreeContext implements TreeContext {
     private final TreeNode root;
+    private final TreeNode unDefineNode;
     private final TreeContext previous;
     private final ChangeList changeList;
     private final String uuid;
     private final String treeName;
     private final long revision;
     private final InterfaceTraverser traverser;
-    private final TreeNode unDefineNode;
+
 
     public DifferenceTreeContext(TreeNode root, TreeNode unDefineNode, TreeContext _prev, ChangeList _log, String _uuid, String _treeName, long _revision, InterfaceTraverser traverser) {
         this.root = root;

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/editor/treeEditor/DifferenceTreeEditor.java	Tue Dec 13 18:23:49 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/editor/treeEditor/DifferenceTreeEditor.java	Tue Dec 13 20:30:01 2016 +0900
@@ -11,9 +11,6 @@
 import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;
 import jp.ac.u_ryukyu.ie.cr.jungle.util.Error.Error;
 
-/**
- * Created by e115731 on 2016/12/11.
- */
 public class DifferenceTreeEditor implements TreeEditor {
     private Traverser traverser;
 
@@ -33,11 +30,10 @@
         if (traverseEither.isA()) {
             return DefaultEither.newA(traverseEither.a());
         }
-
         Traversal traversal = traverseEither.b();
         TreeNode target = traversal.destination();
         Either<Error, LoggingNode> either = editor.edit(target);
-        if (!target.isDefine())
+        if (!target.status())
             return either;
         if (either.isA()) {
             return DefaultEither.newA(either.a());
@@ -47,18 +43,17 @@
         return clone(traversal, newWrap, editor);
     }
 
-    private Either<Error, LoggingNode> clone(Traversal t, LoggingNode newWrap, NodeEditor editor) {
+    private Either<Error, LoggingNode> clone(Traversal traversal, LoggingNode newWrap, NodeEditor editor) {
         // copying nodes from bottom to root
-
         List<Direction<TreeNode>> path = new List<>();
-        for (Direction<TreeNode> direction : t) {
+        for (Direction<TreeNode> direction : traversal) {
             path = path.addLast(direction);
         }
 
-        // top
+        Direction<TreeNode> editedNodeDirection = path.head();
 
-        Direction<TreeNode> targetDirection = path.head();
-        int pos = targetDirection.getPosition();
+        // top
+        int pos = editedNodeDirection.getPosition();
         TreeNode child = newWrap.getWrap();
         for (Direction<TreeNode> parentDirection : path.deleteHead()) {
 

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/node/DefaultTreeNode.java	Tue Dec 13 18:23:49 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/node/DefaultTreeNode.java	Tue Dec 13 20:30:01 2016 +0900
@@ -2,17 +2,15 @@
 
 
 import jp.ac.u_ryukyu.ie.cr.jungle.data.list.List;
+import jp.ac.u_ryukyu.ie.cr.jungle.data.treemap.TreeMap;
 import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;
 import jp.ac.u_ryukyu.ie.cr.jungle.util.Error.Error;
-import jp.ac.u_ryukyu.ie.cr.jungle.data.treemap.TreeMap;
 
 import java.nio.ByteBuffer;
-import java.rmi.dgc.VMID;
 
 public class DefaultTreeNode implements TreeNode {
     private List<TreeNode> children;
     private TreeMap<String, ByteBuffer> attrs;
-    final String nodeId = new VMID().toString();
 
     private static final List<TreeNode> NIL_LIST = new List<>();
 
@@ -36,7 +34,7 @@
     }
 
     @Override
-    public boolean isDefine() {
+    public boolean status() {
         return true;
     }
 

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/node/TreeNode.java	Tue Dec 13 18:23:49 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/node/TreeNode.java	Tue Dec 13 20:30:01 2016 +0900
@@ -9,7 +9,7 @@
 
     public TreeNodeAttributes getAttributes();
 
-    public boolean isDefine();
+    public NodeType status();
 
     public TreeNode createNewNode();
 

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/node/UnDefineNode.java	Tue Dec 13 18:23:49 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/transaction/node/UnDefineNode.java	Tue Dec 13 20:30:01 2016 +0900
@@ -38,7 +38,7 @@
     }
 
     @Override
-    public boolean isDefine() {
+    public boolean status() {
         return false;
     }
 

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/traverser/LastNodeEvaluator.java	Tue Dec 13 18:23:49 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/jungle/traverser/LastNodeEvaluator.java	Tue Dec 13 20:30:01 2016 +0900
@@ -13,7 +13,7 @@
     @Override
     public Evaluation evaluate(TreeNode _current, int _pos) {
 
-        if (!_current.isDefine())
+        if (!_current.status())
                 return new DefaultEvaluation(Result.GOAL, null);
 
         Result result = Result.ACCEPT;