--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/csharp/jp.ac.u-ryukyu.ie.cr/jungle-main/store/operations/DeleteAttributeOperation.cs	Mon Nov 07 01:05:24 2016 +0900
@@ -0,0 +1,32 @@
+using UnityEngine;
+using System.Collections;
+using System;
+
+public class DeleteAttributeOperation : NodeOperation {
+	private string key;
+
+	public DeleteAttributeOperation(string _key) {
+		key = _key;
+	}
+
+	public Command getCommand() {
+		return Command.DELETE_ATTRIBUTE;
+	}
+
+	public Either<Error, TreeNode> invoke(TreeNode _target) {
+		return _target.getAttributes ().delete (key);
+	}
+
+	public int getPosition() {
+		return -1;
+	}
+
+	public string getKey() {
+		return key;
+	}
+
+	public byte[] getValue() {
+		return new byte[1]{0};
+	}
+
+}