diff --git a/Node.java b/Node.java
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+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * 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 net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+
+import org.json.JSONObject;
+
+// 抽象类Node，可能作为数据节点相关操作的基础类，定义了一些通用规范和抽象方法供子类实现
+public abstract class Node {
+    // 同步操作相关的各种类型常量，用于标记不同的同步动作情况
+    public static final int SYNC_ACTION_NONE = 0;
+    public static final int SYNC_ACTION_ADD_REMOTE = 1;
+    public static final int SYNC_ACTION_ADD_LOCAL = 2;
+    public static final int SYNC_ACTION_DEL_REMOTE = 3;
+    public static final int SYNC_ACTION_DEL_LOCAL = 4;
+    public static final int SYNC_ACTION_UPDATE_REMOTE = 5;
+    public static final int SYNC_ACTION_UPDATE_LOCAL = 6;
+    public static final int SYNC_ACTION_UPDATE_CONFLICT = 7;
+    public static final int SYNC_ACTION_ERROR = 8;
+
+    // 存储全局唯一标识符（GID），初始值为null
+    private String mGid;
+    // 节点名称，初始为空字符串
+    private String mName;
+    // 最后修改时间戳，初始为0
+    private long mLastModified;
+    // 表示节点是否被删除的标志，初始为false
+    private boolean mDeleted;
+
+    // 构造函数，初始化各成员变量
+    public Node() {
+        mGid = null;
+        mName = "";
+        mLastModified = 0;
+        mDeleted = false;
+    }
+
+    // 抽象方法，获取创建操作对应的JSON对象，具体由子类实现
+    public abstract JSONObject getCreateAction(int actionId);
+
+    // 抽象方法，获取更新操作对应的JSON对象，子类按业务逻辑实现
+    public abstract JSONObject getUpdateAction(int actionId);
+
+    // 抽象方法，依据远程JSON数据设置节点内容，子类负责解析填充
+    public abstract void setContentByRemoteJSON(JSONObject js);
+
+    // 抽象方法，依据本地JSON数据设置节点内容，由子类实现具体逻辑
+    public abstract void setContentByLocalJSON(JSONObject js);
+
+    // 抽象方法，从节点内容生成本地JSON对象，子类确定JSON结构
+    public abstract JSONObject getLocalJSONFromContent();
+
+    // 抽象方法，根据游标获取节点的同步操作类型，子类判断逻辑
+    public abstract int getSyncAction(Cursor c);
+
+    // 设置GID的方法
+    public void setGid(String gid) {
+        this.mGid = gid;
+    }
+
+    // 设置名称的方法
+    public void setName(String name) {
+        this.mName = name;
+    }
+
+    // 设置最后修改时间的方法
+    public void setLastModified(long lastModified) {
+        this.mLastModified = lastModified;
+    }
+
+    // 设置是否删除状态的方法
+    public void setDeleted(boolean deleted) {
+        this.mDeleted = deleted;
+    }
+
+    // 获取GID的方法
+    public String getGid() {
+        return this.mGid;
+    }
+
+    // 获取名称的方法
+    public String getName() {
+        return this.mName;
+    }
+
+    // 获取最后修改时间的方法
+    public long getLastModified() {
+        return this.mLastModified;
+    }
+
+    // 获取是否删除状态的方法
+    public boolean getDeleted() {
+        return this.mDeleted;
+    }
+}
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