添加了@Dtc（数据类型转换）、@Data（获取全局数据）表达式

NodeFlow/Model/SingleGlobalDataNode.cs

@@ -0,0 +1,30 @@
+using Serein.Library;
+using Serein.Library.Api;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.NodeFlow.Model
+{
+    /// <summary>
+    /// 全局数据节点
+    /// </summary>
+    public class SingleGlobalDataNode : NodeModelBase
+    {
+        public SingleGlobalDataNode(IFlowEnvironment environment) : base(environment)
+        {
+        }
+
+        public override ParameterData[] GetParameterdatas()
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void OnCreating()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}