diff --git a/GFramework.Core.Godot/system/AssetCatalog.cs b/GFramework.Core.Godot/system/AssetCatalog.cs
index 19020e9..2d6d32b 100644
--- a/GFramework.Core.Godot/system/AssetCatalog.cs
+++ b/GFramework.Core.Godot/system/AssetCatalog.cs
@@ -6,15 +6,34 @@ namespace GFramework.Core.Godot.system;
 /// </summary>
 public static class AssetCatalog
 {
+    /// <summary>
+    /// 资源标识符接口，定义了资源路径的访问接口
+    /// </summary>
+    public interface IAssetId
+    {
+        /// <summary>
+        /// 获取资源的路径
+        /// </summary>
+        string Path { get; }
+    }
+
+    /// <summary>
+    /// 资源目录映射结构体，用于存储资源目录的键值对映射关系
+    /// </summary>
+    /// <param name="Key">资源目录的键</param>
+    /// <param name="Id">资源标识符</param>
+    public readonly record struct AssetCatalogMapping(string Key, IAssetId Id);
+    
     /// <summary>
     /// 场景标识符结构体，用于唯一标识一个场景资源
     /// </summary>
     /// <param name="Path">场景资源的路径</param>
-    public readonly record struct SceneId(string Path);
+    public readonly record struct SceneId(string Path) : IAssetId;
     
     /// <summary>
     /// 资源标识符结构体，用于唯一标识一个游戏资源
     /// </summary>
     /// <param name="Path">游戏资源的路径</param>
-    public readonly record struct ResourceId(string Path);
+    public readonly record struct ResourceId(string Path) : IAssetId;
+
 }