diff --git a/packages/designer/src/builtin-simulator/bem-tools/insertion.tsx b/packages/designer/src/builtin-simulator/bem-tools/insertion.tsx
index 9fa3b6798..f0c546b99 100644
--- a/packages/designer/src/builtin-simulator/bem-tools/insertion.tsx
+++ b/packages/designer/src/builtin-simulator/bem-tools/insertion.tsx
@@ -10,7 +10,7 @@ import {
   isVertical
 } from '../../designer';
 import { ISimulatorHost, } from '../../simulator';
-import {NodeParent } from '../../document';
+import {ParentalNode } from '../../document';
 import './insertion.less';
 
 interface InsertionData {
@@ -24,7 +24,7 @@ interface InsertionData {
 /**
  * 处理拖拽子节点(INode)情况
  */
-function processChildrenDetail(sim: ISimulatorHost, container: NodeParent, detail: LocationChildrenDetail): InsertionData {
+function processChildrenDetail(sim: ISimulatorHost, container: ParentalNode, detail: LocationChildrenDetail): InsertionData {
   let edge = detail.edge || null;
 
   if (!edge) {
diff --git a/packages/designer/src/builtin-simulator/host.ts b/packages/designer/src/builtin-simulator/host.ts
index 18fc15a83..0dbddf5f1 100644
--- a/packages/designer/src/builtin-simulator/host.ts
+++ b/packages/designer/src/builtin-simulator/host.ts
@@ -2,7 +2,7 @@ import { obx, autorun, computed } from '@ali/lowcode-globals';
 import { ISimulatorHost, Component, NodeInstance, ComponentInstance } from '../simulator';
 import Viewport from './viewport';
 import { createSimulator } from './create-simulator';
-import { Node, NodeParent, DocumentModel, isNodeParent, isNode, contains, isRootNode } from '../document';
+import { Node, ParentalNode, DocumentModel, isNode, contains, isRootNode } from '../document';
 import ResourceConsumer from './resource-consumer';
 import { AssetLevel, Asset, AssetList, assetBundle, assetItem, AssetType, getPublicPath } from '@ali/lowcode-globals';
 import {
@@ -21,7 +21,7 @@ import {
   Rect,
   CanvasPoint,
 } from '../designer';
-import { parseProps } from './utils/parse-props';
+import { parseProps, parseMetadata } from './utils/parse-metadata';
 import { isElement, hotkey } from '@ali/lowcode-globals';
 import { ComponentMetadata } from '@ali/lowcode-globals';
 import { BuiltinSimulatorRenderer } from './renderer';
@@ -387,16 +387,19 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
 
     const component = this.getComponent(componentName);
 
-    if (component) {
-      parseProps(component as any);
+    if (!component) {
+      return {
+        componentName,
+      };
     }
 
     // TODO:
     // 1. generate builtin div/p/h1/h2
     // 2. read propTypes
+
     return {
       componentName,
-      props: parseProps(this.getComponent(componentName)),
+      ...parseMetadata(component),
     };
   }
 
@@ -854,7 +857,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
       container = currentRoot;
     }
 
-    if (!isNodeParent(container)) {
+    if (!container.isParental()) {
       container = container.parent || currentRoot;
     }
 
@@ -943,7 +946,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
     return null;
   }
 
-  isAcceptable(container: NodeParent): boolean {
+  isAcceptable(container: ParentalNode): boolean {
     return false;
     /*
     const meta = container.componentMeta;
@@ -1006,7 +1009,7 @@ export class BuiltinSimulatorHost implements ISimulatorHost<BuiltinSimulatorProp
   /**
    * 查找邻近容器
    */
-  getNearByContainer(container: NodeParent, e: LocateEvent) {
+  getNearByContainer(container: ParentalNode, e: LocateEvent) {
     /*
     const children = container.children;
     if (!children || children.length < 1) {
@@ -1110,6 +1113,6 @@ function getMatched(elements: Array<Element | Text>, selector: string): Element
 }
 
 interface DropContainer {
-  container: NodeParent;
+  container: ParentalNode;
   instance: ComponentInstance;
 }
diff --git a/packages/designer/src/builtin-simulator/utils/parse-props.ts b/packages/designer/src/builtin-simulator/utils/parse-metadata.ts
similarity index 97%
rename from packages/designer/src/builtin-simulator/utils/parse-props.ts
rename to packages/designer/src/builtin-simulator/utils/parse-metadata.ts
index a427ff3c1..257f09609 100644
--- a/packages/designer/src/builtin-simulator/utils/parse-props.ts
+++ b/packages/designer/src/builtin-simulator/utils/parse-metadata.ts
@@ -198,3 +198,10 @@ export function parseProps(component: any): PropConfig[] {
 
   return Object.keys(result).map(key => result[key]);
 }
+
+export function parseMetadata(component: any): any {
+  return {
+    props: parseProps(component),
+    ...component.componentMetadata,
+  };
+}
diff --git a/packages/designer/src/component-meta.ts b/packages/designer/src/component-meta.ts
index 3c531acb7..d4ff4a6b6 100644
--- a/packages/designer/src/component-meta.ts
+++ b/packages/designer/src/component-meta.ts
@@ -11,7 +11,7 @@ import {
   computed,
   NestingFilter,
 } from '@ali/lowcode-globals';
-import { Node, NodeParent } from './document';
+import { Node, ParentalNode } from './document';
 import { Designer } from './designer';
 import { intl } from './locale';
 import { IconContainer } from './icons/container';
@@ -194,7 +194,7 @@ export class ComponentMeta {
     return this._transformedMetadata!;
   }
 
-  checkNestingUp(my: Node | NodeData, parent: NodeParent) {
+  checkNestingUp(my: Node | NodeData, parent: ParentalNode) {
     // 检查父子关系，直接约束型，在画布中拖拽直接掠过目标容器
     if (this.parentWhitelist) {
       return this.parentWhitelist(parent, my);
diff --git a/packages/designer/src/designer/designer.ts b/packages/designer/src/designer/designer.ts
index a53002477..39ddd99c9 100644
--- a/packages/designer/src/designer/designer.ts
+++ b/packages/designer/src/designer/designer.ts
@@ -10,7 +10,7 @@ import {
   autorun,
 } from '@ali/lowcode-globals';
 import { Project } from '../project';
-import { Node, DocumentModel, insertChildren, isRootNode, NodeParent } from '../document';
+import { Node, DocumentModel, insertChildren, isRootNode, ParentalNode } from '../document';
 import { ComponentMeta } from '../component-meta';
 import { INodeSelector, Component } from '../simulator';
 import { Scroller, IScrollable } from './scroller';
@@ -201,7 +201,7 @@ export class Designer {
   /**
    * 获得合适的插入位置
    */
-  getSuitableInsertion(): { target: NodeParent; index?: number } | null {
+  getSuitableInsertion(): { target: ParentalNode; index?: number } | null {
     const activedDoc = this.project.currentDocument;
     if (!activedDoc) {
       return null;
diff --git a/packages/designer/src/designer/dragon.ts b/packages/designer/src/designer/dragon.ts
index e009a08a2..58c14acea 100644
--- a/packages/designer/src/designer/dragon.ts
+++ b/packages/designer/src/designer/dragon.ts
@@ -88,7 +88,6 @@ export interface DragNodeObject {
 export interface DragNodeDataObject {
   type: DragObjectType.NodeData;
   data: NodeSchema | NodeSchema[];
-  maps?: { [componentName: string]: string };
   thumbnail?: string;
   description?: string;
   [extra: string]: any;
@@ -233,7 +232,7 @@ export class Dragon {
     const masterSensors = this.getMasterSensors();
     const handleEvents = makeEventsHandler(boostEvent, masterSensors);
     const newBie = !isDragNodeObject(dragObject);
-    const forceCopyState = isDragNodeObject(dragObject) && dragObject.nodes.some((node) => node.isSlotRoot);
+    const forceCopyState = isDragNodeObject(dragObject) && dragObject.nodes.some((node) => node.isSlot());
     const isBoostFromDragAPI = boostEvent.type.substr(0, 4) === 'drag';
     let lastSensor: ISensor | undefined;
 
diff --git a/packages/designer/src/designer/location.ts b/packages/designer/src/designer/location.ts
index 2c82891ca..5de3df7e0 100644
--- a/packages/designer/src/designer/location.ts
+++ b/packages/designer/src/designer/location.ts
@@ -1,8 +1,8 @@
-import { DocumentModel, Node as ComponentNode, NodeParent } from '../document';
+import { DocumentModel, Node as ComponentNode, ParentalNode } from '../document';
 import { LocateEvent } from './dragon';
 
 export interface LocationData {
-  target: NodeParent; // shadowNode | ConditionFlow | ElementNode | RootNode
+  target: ParentalNode; // shadowNode | ConditionFlow | ElementNode | RootNode
   detail: LocationDetail;
   source: string;
   event: LocateEvent;
@@ -27,7 +27,7 @@ export interface LocationChildrenDetail {
     rect?: Rect;
     align?: 'V' | 'H';
   };
-  focus?: { type: 'slots' } | { type: 'node'; node: NodeParent };
+  focus?: { type: 'slots' } | { type: 'node'; node: ParentalNode };
 }
 
 export interface LocationPropDetail {
@@ -126,7 +126,7 @@ export function getWindow(elem: Element | Document): Window {
 }
 
 export class DropLocation {
-  readonly target: NodeParent;
+  readonly target: ParentalNode;
   readonly detail: LocationDetail;
   readonly event: LocateEvent;
   readonly source: string;
diff --git a/packages/designer/src/document/document-model.ts b/packages/designer/src/document/document-model.ts
index 13b2e19d3..b0129f51c 100644
--- a/packages/designer/src/document/document-model.ts
+++ b/packages/designer/src/document/document-model.ts
@@ -1,5 +1,4 @@
 import {
-  RootSchema,
   NodeData,
   isJSExpression,
   isDOMText,
@@ -9,16 +8,26 @@ import {
   autorun,
   isNodeSchema,
   uniqueId,
+  PageSchema,
+  ComponentSchema,
+  RootSchema,
 } from '@ali/lowcode-globals';
 import { Project } from '../project';
 import { ISimulatorHost } from '../simulator';
 import { ComponentMeta } from '../component-meta';
 import { isDragNodeDataObject, DragNodeObject, DragNodeDataObject, DropLocation } from '../designer';
-import { Node, isNodeParent, insertChildren, insertChild, NodeParent, isNode } from './node/node';
+import { Node, insertChildren, insertChild, isNode, RootNode, ParentalNode } from './node/node';
 import { Selection } from './selection';
-import { RootNode } from './node/root-node';
 import { History } from './history';
-import { Prop } from './node/props/prop';
+import { ExportType } from './node';
+
+export type GetDataType<T, NodeType> = T extends undefined
+  ? NodeType extends {
+      schema: infer R;
+    }
+    ? R
+    : any
+  : T;
 
 export class DocumentModel {
   /**
@@ -58,7 +67,7 @@ export class DocumentModel {
     this.rootNode.getExtraProp('fileName', true)?.setValue(fileName);
   }
 
-  private _modalNode?: NodeParent;
+  private _modalNode?: ParentalNode;
   private _blank?: boolean;
   get modalNode() {
     return this._modalNode;
@@ -81,8 +90,9 @@ export class DocumentModel {
       this._blank = true;
     }
 
-    this.rootNode = this.createRootNode(schema || {
+    this.rootNode = this.createNode<RootNode>(schema || {
       componentName: 'Page',
+      id: 'root',
       fileName: ''
     });
 
@@ -130,7 +140,7 @@ export class DocumentModel {
   /**
    * 根据 schema 创建一个节点
    */
-  createNode(data: NodeData, slotFor?: Prop): Node {
+  createNode<T extends Node = Node, C = undefined>(data: GetDataType<C, T>): T {
     let schema: any;
     if (isDOMText(data) || isJSExpression(data)) {
       schema = {
@@ -150,14 +160,13 @@ export class DocumentModel {
           // will move to another position
           // todo: this.activeNodes?.push(node);
         }
-        node.internalSetSlotFor(slotFor);
         node.import(schema, true);
       } else if (node) {
         node = null;
       }
     }
     if (!node) {
-      node = new Node(this, schema, slotFor);
+      node = new Node(this, schema);
       // will add
       // todo: this.activeNodes?.push(node);
     }
@@ -169,27 +178,20 @@ export class DocumentModel {
     this.nodesMap.set(node.id, node);
     this.nodes.add(node);
 
-    return node;
-  }
-
-  private createRootNode(schema: RootSchema) {
-    const node = new RootNode(this, schema);
-    this.nodesMap.set(node.id, node);
-    this.nodes.add(node);
-    return node;
+    return node as any;
   }
 
   /**
    * 插入一个节点
    */
-  insertNode(parent: NodeParent, thing: Node | NodeData, at?: number | null, copy?: boolean): Node {
+  insertNode(parent: ParentalNode, thing: Node | NodeData, at?: number | null, copy?: boolean): Node {
     return insertChild(parent, thing, at, copy);
   }
 
   /**
    * 插入多个节点
    */
-  insertNodes(parent: NodeParent, thing: Node[] | NodeData[], at?: number | null, copy?: boolean) {
+  insertNodes(parent: ParentalNode, thing: Node[] | NodeData[], at?: number | null, copy?: boolean) {
     return insertChildren(parent, thing, at, copy);
   }
 
@@ -249,7 +251,7 @@ export class DocumentModel {
       return null;
     }
     const wrapper = this.createNode(schema);
-    if (isNodeParent(wrapper)) {
+    if (wrapper.isParental()) {
       const first = nodes[0];
       // TODO: check nesting rules x 2
       insertChild(first.parent!, wrapper, first.index);
@@ -270,11 +272,15 @@ export class DocumentModel {
   }
 
   import(schema: RootSchema, checkId = false) {
-    this.rootNode.import(schema, checkId);
+    this.rootNode.import(schema as any, checkId);
     // todo: purge something
     // todo: select added and active track added
   }
 
+  export(exportType: ExportType = ExportType.ForSerilize) {
+    return this.rootNode.export(exportType);
+  }
+
   /**
    * 导出节点数据
    */
@@ -409,7 +415,7 @@ export class DocumentModel {
     // todo:
   }
 
-  checkNesting(dropTarget: NodeParent, dragObject: DragNodeObject | DragNodeDataObject): boolean {
+  checkNesting(dropTarget: ParentalNode, dragObject: DragNodeObject | DragNodeDataObject): boolean {
     let items: Array<Node | NodeSchema>;
     if (isDragNodeDataObject(dragObject)) {
       items = Array.isArray(dragObject.data) ? dragObject.data : [dragObject.data];
@@ -419,7 +425,7 @@ export class DocumentModel {
     return items.every((item) => this.checkNestingDown(dropTarget, item));
   }
 
-  checkDropTarget(dropTarget: NodeParent, dragObject: DragNodeObject | DragNodeDataObject): boolean {
+  checkDropTarget(dropTarget: ParentalNode, dragObject: DragNodeObject | DragNodeDataObject): boolean {
     let items: Array<Node | NodeSchema>;
     if (isDragNodeDataObject(dragObject)) {
       items = Array.isArray(dragObject.data) ? dragObject.data : [dragObject.data];
@@ -432,7 +438,7 @@ export class DocumentModel {
   /**
    * 检查对象对父级的要求，涉及配置 parentWhitelist
    */
-  checkNestingUp(parent: NodeParent, obj: NodeSchema | Node): boolean {
+  checkNestingUp(parent: ParentalNode, obj: NodeSchema | Node): boolean {
     if (isNode(obj) || isNodeSchema(obj)) {
       const config = isNode(obj) ? obj.componentMeta : this.getComponentMeta(obj.componentName);
       if (config) {
@@ -446,7 +452,7 @@ export class DocumentModel {
   /**
    * 检查投放位置对子级的要求，涉及配置 childWhitelist
    */
-  checkNestingDown(parent: NodeParent, obj: NodeSchema | Node): boolean {
+  checkNestingDown(parent: ParentalNode, obj: NodeSchema | Node): boolean {
     const config = parent.componentMeta;
     return config.checkNestingDown(parent, obj) && this.checkNestingUp(parent, obj);
   }
diff --git a/packages/designer/src/document/node/export-type.ts b/packages/designer/src/document/node/export-type.ts
new file mode 100644
index 000000000..b57e52fff
--- /dev/null
+++ b/packages/designer/src/document/node/export-type.ts
@@ -0,0 +1,5 @@
+export enum ExportType {
+  ForRender = 1,
+  ForSerilize = 2,
+  ForSave = 3,
+}
diff --git a/packages/designer/src/document/node/index.ts b/packages/designer/src/document/node/index.ts
index 4a387ce79..7251d43c8 100644
--- a/packages/designer/src/document/node/index.ts
+++ b/packages/designer/src/document/node/index.ts
@@ -1,7 +1,7 @@
 export * from './exclusive-group';
 export * from './node';
 export * from './node-children';
-export * from './root-node';
 export * from './props/prop';
 export * from './props/prop-stash';
 export * from './props/props';
+export * from './export-type';
diff --git a/packages/designer/src/document/node/node-children.ts b/packages/designer/src/document/node/node-children.ts
index c17702dcc..40d448420 100644
--- a/packages/designer/src/document/node/node-children.ts
+++ b/packages/designer/src/document/node/node-children.ts
@@ -1,9 +1,10 @@
 import { NodeData, isNodeSchema, obx, computed } from '@ali/lowcode-globals';
-import { Node, NodeParent } from './node';
+import { Node, ParentalNode } from './node';
+import { ExportType } from './export-type';
 
 export class NodeChildren {
   @obx.val private children: Node[];
-  constructor(readonly owner: NodeParent, data: NodeData | NodeData[]) {
+  constructor(readonly owner: ParentalNode, data: NodeData | NodeData[]) {
     this.children = (Array.isArray(data) ? data : [data]).map(child => {
       return this.owner.document.createNode(child);
     });
@@ -15,10 +16,16 @@ export class NodeChildren {
 
   /**
    * 导出 schema
-   * @param serialize 序列化，加 id 标识符，用于储存为操作记录
    */
-  export(serialize = false): NodeData[] {
-    return this.children.map(node => node.export(serialize));
+  export(exportType: ExportType = ExportType.ForSave): NodeData[] {
+    return this.children.map(node => {
+      const data = node.export(exportType);
+      if (node.isLeaf() && ExportType.ForSave === exportType) {
+        // FIXME: filter empty
+        return data.children as NodeData;
+      }
+      return data;
+    });
   }
 
   import(data?: NodeData | NodeData[], checkId = false) {
diff --git a/packages/designer/src/document/node/node.ts b/packages/designer/src/document/node/node.ts
index f3990e98d..ad02a56fe 100644
--- a/packages/designer/src/document/node/node.ts
+++ b/packages/designer/src/document/node/node.ts
@@ -8,6 +8,9 @@ import {
   TitleContent,
   obx,
   computed,
+  SlotSchema,
+  PageSchema,
+  ComponentSchema,
 } from '@ali/lowcode-globals';
 import { Props, EXTRA_KEY_PREFIX } from './props/props';
 import { DocumentModel } from '../document-model';
@@ -15,6 +18,7 @@ import { NodeChildren } from './node-children';
 import { Prop } from './props/prop';
 import { ComponentMeta } from '../../component-meta';
 import { ExclusiveGroup, isExclusiveGroup } from './exclusive-group';
+import { ExportType } from './export-type';
 
 /**
  * 基础节点
@@ -35,8 +39,36 @@ import { ExclusiveGroup, isExclusiveGroup } from './exclusive-group';
  *  locked         can not select/hover/ item on canvas but can control on outline
  *  hidden         not visible on canvas
  *  slotArgs       like loopArgs, for slot node
+ *
+ * 根容器节点
+ *
+ * [Node Properties]
+ *  componentName: Page/Block/Component
+ *  props
+ *  children
+ *
+ * [Root Container Extra Properties]
+ *  fileName
+ *  meta
+ *  state
+ *  defaultProps
+ *  dataSource
+ *  lifeCycles
+ *  methods
+ *  css
+ *
+ * [Directives **not used**]
+ *  loop
+ *  loopArgs
+ *  condition
+ *  ------- future support -----
+ *  conditionGroup
+ *  title
+ *  ignore
+ *  locked
+ *  hidden
  */
-export class Node {
+export class Node<Schema extends NodeSchema = NodeSchema> {
   /**
    * 是节点实例
    */
@@ -63,11 +95,11 @@ export class Node {
    */
   readonly props: Props;
   protected _children?: NodeChildren;
-  @obx.ref private _parent: NodeParent | null = null;
+  @obx.ref private _parent: ParentalNode | null = null;
   /**
    * 父级节点
    */
-  get parent(): NodeParent | null {
+  get parent(): ParentalNode | null {
     return this._parent;
   }
   /**
@@ -100,48 +132,71 @@ export class Node {
     return this.componentMeta.title;
   }
 
-  get isSlotRoot(): boolean {
-    return this._slotFor != null;
-  }
-
-  isRoot() {
-    return (this.document.rootNode as any) == this;
-  }
-
-  constructor(readonly document: DocumentModel, nodeSchema: NodeSchema, slotFor?: Prop) {
+  constructor(readonly document: DocumentModel, nodeSchema: Schema) {
     const { componentName, id, children, props, ...extras } = nodeSchema;
     this.id = id || `node$${document.nextId()}`;
     this.componentName = componentName;
-    this._slotFor = slotFor;
     let _props: Props;
-    if (isNodeParent(this)) {
-      _props = new Props(this, props, extras);
-      this._children = new NodeChildren(this as NodeParent, children || []);
-      this._children.interalInitParent();
-    } else {
+    if (this.componentName === 'Leaf') {
       _props = new Props(this, {
         children: isDOMText(children) || isJSExpression(children) ? children : '',
       });
+    } else {
+      _props = new Props(this, this.buildProps(props), extras);
+      this._children = new NodeChildren(this as ParentalNode, children || []);
+      this._children.interalInitParent();
     }
     this.props = _props;
   }
 
+  private buildProps(props: any): any {
+    // TODO: run componentMeta(initials|initialValue|accessor)
+    return props;
+  }
+
+  isContainer(): boolean {
+    return this.isParental() && this.componentMeta.isContainer;
+  }
+
+  isRoot(): this is RootNode {
+    return this.document.rootNode == this as any;
+  }
+
+  isPage(): this is PageNode {
+    return this.isRoot() && this.componentName === 'Page';
+  }
+
+  isComponent(): this is ComponentNode {
+    return this.isRoot() && this.componentName === 'Component';
+  }
+
+  isSlot(): this is SlotNode {
+    return this._slotFor != null && this.componentName === 'Slot';
+  }
+
   /**
    * 是否一个父亲类节点
    */
-  get isNodeParent(): boolean {
-    return this.componentName !== 'Leaf';
+  isParental(): this is ParentalNode {
+    return !this.isLeaf();
+  }
+
+  /**
+   * 终端节点，内容一般为 文字 或者 表达式
+   */
+  isLeaf(): this is LeafNode {
+    return this.componentName === 'Leaf';
   }
 
   /**
    * 内部方法，请勿使用
    */
-  internalSetParent(parent: NodeParent | null) {
+  internalSetParent(parent: ParentalNode | null) {
     if (this._parent === parent) {
       return;
     }
 
-    if (this._parent && !this.isSlotRoot) {
+    if (!this.isSlot() && this._parent) {
       this._parent.children.delete(this);
     }
 
@@ -160,6 +215,9 @@ export class Node {
     this._slotFor = slotFor;
   }
 
+  /**
+   * 关联属性
+   */
   get slotFor() {
     return this._slotFor;
   }
@@ -168,7 +226,7 @@ export class Node {
    * 移除当前节点
    */
   remove() {
-    if (this.parent && !this.isSlotRoot) {
+    if (!this.isSlot() && this.parent) {
       this.parent.children.delete(this, true);
     }
   }
@@ -199,17 +257,13 @@ export class Node {
   }
 
   @computed get propsData(): PropsMap | PropsList | null {
-    if (!this.isNodeParent || this.componentName === 'Fragment') {
+    if (!this.isParental() || this.componentName === 'Fragment') {
       return null;
     }
-    return this.props.export(true).props || null;
+    return this.props.export(ExportType.ForSerilize).props || null;
   }
 
-  isContainer() {
-    return this.isNodeParent && this.componentMeta.isContainer;
-  }
-
-  @computed isSlotContainer() {
+  @computed hasSlots() {
     for (const item of this.props) {
       if (item.type === 'slot') {
         return true;
@@ -280,11 +334,11 @@ export class Node {
     return v != null && v !== '';
   }
 
-  wrapWith(schema: NodeSchema) {
+  wrapWith(schema: Schema) {
     // todo
   }
 
-  replaceWith(schema: NodeSchema, migrate = true) {
+  replaceWith(schema: Schema, migrate = true) {
     // reuse the same id? or replaceSelection
     //
   }
@@ -366,22 +420,18 @@ export class Node {
   /**
    * 获取符合搭建协议-节点 schema 结构
    */
-  get schema(): NodeSchema {
-    // FIXME! serilize?
-    // for design - pass to Renderer
-    // for save production data
-    // for serilize mutation record
-    return this.export(true);
+  get schema(): Schema {
+    return this.export(ExportType.ForSave);
   }
 
-  set schema(data: NodeSchema) {
+  set schema(data: Schema) {
     this.import(data);
   }
 
-  import(data: NodeSchema, checkId = false) {
+  import(data: Schema, checkId = false) {
     const { componentName, id, children, props, ...extras } = data;
 
-    if (isNodeParent(this)) {
+    if (this.isParental()) {
       this.props.import(props, extras);
       (this._children as NodeChildren).import(children, checkId);
     } else {
@@ -391,32 +441,32 @@ export class Node {
 
   /**
    * 导出 schema
-   * @param serialize 序列化，加 id 标识符，用于储存为操作记录
    */
-  export(serialize = false): NodeSchema {
+  export(exportType: ExportType = ExportType.ForSave): Schema {
+    // run transducers
+    // run
     const baseSchema: any = {
-      componentName: this.componentName === 'Leaf' ? 'Fragment' : this.componentName,
+      componentName: this.componentName,
     };
 
-    if (serialize) {
+    if (exportType !== ExportType.ForSave) {
       baseSchema.id = this.id;
     }
 
-    if (!isNodeParent(this)) {
-      baseSchema.children = this.props.get('children')?.export(serialize);
-      // FIXME!
-      return baseSchema.children;
+    if (this.isLeaf()) {
+      baseSchema.children = this.props.get('children')?.export(exportType);
+      return baseSchema;
     }
 
-    const { props = {}, extras } = this.props.export(serialize) || {};
+    const { props = {}, extras } = this.props.export(exportType) || {};
     const schema: any = {
       ...baseSchema,
       props,
       ...extras,
     };
 
-    if (this.children.size > 0) {
-      schema.children = this.children.export(serialize);
+    if (this.isParental() && this.children.size > 0) {
+      schema.children = this.children.export(exportType);
     }
 
     return schema;
@@ -468,7 +518,7 @@ export class Node {
       return;
     }
     this.purged = true;
-    if (isNodeParent(this)) {
+    if (this.isParental()) {
       this.children.purge();
     }
     this.props.purge();
@@ -510,7 +560,7 @@ export class Node {
   /**
    * @deprecated
    */
-  getDOMNode() {
+  getDOMNode(): any {
     const instance = this.document.simulator?.getComponentInstances(this)?.[0];
     if (!instance) {
       return;
@@ -535,17 +585,24 @@ export class Node {
   }
 }
 
-export interface NodeParent extends Node {
+export interface ParentalNode<T extends NodeSchema = NodeSchema> extends Node<T> {
   readonly children: NodeChildren;
-  readonly props: Props;
 }
+export interface LeafNode extends Node {
+  readonly children: null;
+}
+
+export interface SlotNode extends ParentalNode<SlotSchema> {}
+export interface PageNode extends ParentalNode<PageSchema> {}
+export interface ComponentNode extends ParentalNode<ComponentSchema> {}
+export type RootNode = PageNode | ComponentNode;
 
 export function isNode(node: any): node is Node {
   return node && node.isNode;
 }
 
-export function isNodeParent(node: Node): node is NodeParent {
-  return node.isNodeParent;
+export function isRootNode(node: Node): node is RootNode {
+  return node && node.isRoot();
 }
 
 export function getZLevelTop(child: Node, zLevel: number): Node | null {
@@ -568,7 +625,7 @@ export function contains(node1: Node, node2: Node): boolean {
     return true;
   }
 
-  if (!node1.isNodeParent || !node2.parent) {
+  if (!node1.isParental || !node2.parent) {
     return false;
   }
 
@@ -617,10 +674,10 @@ export function comparePosition(node1: Node, node2: Node): PositionNO {
   return PositionNO.BeforeOrAfter;
 }
 
-export function insertChild(container: NodeParent, thing: Node | NodeData, at?: number | null, copy?: boolean): Node {
+export function insertChild(container: ParentalNode, thing: Node | NodeData, at?: number | null, copy?: boolean): Node {
   let node: Node;
-  if (isNode(thing) && (copy || thing.isSlotRoot)) {
-    thing = thing.export(false);
+  if (isNode(thing) && (copy || thing.isSlot())) {
+    thing = thing.export(ExportType.ForSave);
   }
   if (isNode(thing)) {
     node = thing;
@@ -634,7 +691,7 @@ export function insertChild(container: NodeParent, thing: Node | NodeData, at?:
 }
 
 export function insertChildren(
-  container: NodeParent,
+  container: ParentalNode,
   nodes: Node[] | NodeData[],
   at?: number | null,
   copy?: boolean,
diff --git a/packages/designer/src/document/node/props/prop.ts b/packages/designer/src/document/node/props/prop.ts
index 196e66ef9..4ec68c44c 100644
--- a/packages/designer/src/document/node/props/prop.ts
+++ b/packages/designer/src/document/node/props/prop.ts
@@ -2,11 +2,11 @@ import {
   CompositeValue,
   isJSExpression,
   isJSSlot,
-  NodeData,
-  isNodeSchema,
   untracked,
   computed,
-  obx
+  obx,
+  JSSlot,
+  SlotSchema
 } from '@ali/lowcode-globals';
 import { uniqueId } from '@ali/lowcode-globals';
 import { isPlainObject } from '@ali/lowcode-globals';
@@ -14,7 +14,8 @@ import { hasOwnProperty } from '@ali/lowcode-globals';
 import { PropStash } from './prop-stash';
 import { valueToSource } from './value-to-source';
 import { Props } from './props';
-import { Node } from '../node';
+import { SlotNode } from '../node';
+import { ExportType } from '../export-type';
 
 export const UNSET = Symbol.for('unset');
 export type UNSET = typeof UNSET;
@@ -45,10 +46,10 @@ export class Prop implements IPropParent {
    * 属性值
    */
   @computed get value(): CompositeValue | UNSET {
-    return this.export(true);
+    return this.export(ExportType.ForSerilize);
   }
 
-  export(serialize = false): CompositeValue | UNSET {
+  export(exporType: ExportType = ExportType.ForSave): CompositeValue | UNSET {
     const type = this._type;
 
     if (type === 'unset') {
@@ -60,9 +61,18 @@ export class Prop implements IPropParent {
     }
 
     if (type === 'slot') {
+      const schema = this._slotNode!.export(exporType);
+      if (exporType === ExportType.ForSave) {
+        return {
+          type: 'JSSlot',
+          params: schema.params,
+          value: schema.children,
+        };
+      }
       return {
         type: 'JSSlot',
-        value: this._slotNode!.export(serialize),
+        params: schema.params,
+        value: schema,
       };
     }
 
@@ -72,7 +82,7 @@ export class Prop implements IPropParent {
       }
       const maps: any = {};
       this.items!.forEach((prop, key) => {
-        const v = prop.export(serialize);
+        const v = prop.export(exporType);
         if (v !== UNSET) {
           maps[key] = v;
         }
@@ -85,7 +95,7 @@ export class Prop implements IPropParent {
         return this._value;
       }
       return this.items!.map((prop) => {
-        const v = prop.export(serialize);
+        const v = prop.export(exporType);
         return v === UNSET ? null : v;
       });
     }
@@ -103,7 +113,7 @@ export class Prop implements IPropParent {
     }
     // todo: JSFunction ...
     if (this.type === 'slot') {
-      return JSON.stringify(this._slotNode!.export(false));
+      return JSON.stringify(this._slotNode!.export(ExportType.ForSave));
     }
     return this._code != null ? this._code : JSON.stringify(this.value);
   }
@@ -161,7 +171,7 @@ export class Prop implements IPropParent {
       this._type = 'list';
     } else if (isPlainObject(val)) {
       if (isJSSlot(val)) {
-        this.setAsSlot(val.value);
+        this.setAsSlot(val);
         return;
       }
       if (isJSExpression(val)) {
@@ -181,7 +191,7 @@ export class Prop implements IPropParent {
   }
 
   @computed getValue(): CompositeValue {
-    const v = this.export(true);
+    const v = this.export(ExportType.ForSerilize);
     if (v === UNSET) {
       return null;
     }
@@ -204,24 +214,25 @@ export class Prop implements IPropParent {
     }
   }
 
-  private _slotNode?: Node;
+  private _slotNode?: SlotNode;
   get slotNode() {
     return this._slotNode;
   }
-  setAsSlot(data: NodeData) {
+  setAsSlot(data: JSSlot) {
     this._type = 'slot';
-    if (
-      this._slotNode &&
-      isNodeSchema(data) &&
-      (!data.id || this._slotNode.id === data.id) &&
-      this._slotNode.componentName === data.componentName
-    ) {
-      this._slotNode.import(data);
+    const slotSchema: SlotSchema = {
+      componentName: 'Slot',
+      title: data.title,
+      params: data.params,
+      children: data.value,
+    };
+    if (this._slotNode) {
+      this._slotNode.import(slotSchema);
     } else {
-      this._slotNode?.internalSetParent(null);
       const owner = this.props.owner;
-      this._slotNode = owner.document.createNode(data, this);
+      this._slotNode = owner.document.createNode<SlotNode>(slotSchema);
       this._slotNode.internalSetParent(owner as any);
+      this._slotNode.internalSetSlotFor(this);
     }
     this.dispose();
   }
diff --git a/packages/designer/src/document/node/props/props.ts b/packages/designer/src/document/node/props/props.ts
index 5a97a1e18..57200134b 100644
--- a/packages/designer/src/document/node/props/props.ts
+++ b/packages/designer/src/document/node/props/props.ts
@@ -2,6 +2,7 @@ import { PropsMap, PropsList, CompositeValue, computed, obx, uniqueId } from '@a
 import { PropStash } from './prop-stash';
 import { Prop, IPropParent, UNSET } from './prop';
 import { Node } from '../node';
+import { ExportType } from '../export-type';
 
 export const EXTRA_KEY_PREFIX = '__';
 
@@ -79,7 +80,7 @@ export class Props implements IPropParent {
     });
   }
 
-  export(serialize = false): { props?: PropsMap | PropsList; extras?: object } {
+  export(exportType: ExportType = ExportType.ForSave): { props?: PropsMap | PropsList; extras?: object } {
     if (this.items.length < 1) {
       return {};
     }
@@ -88,7 +89,7 @@ export class Props implements IPropParent {
     if (this.type === 'list') {
       props = [];
       this.items.forEach(item => {
-        let value = item.export(serialize);
+        let value = item.export(exportType);
         if (value === UNSET) {
           value = null;
         }
@@ -111,7 +112,7 @@ export class Props implements IPropParent {
           // todo ...spread
           return;
         }
-        let value = item.export(serialize);
+        let value = item.export(exportType);
         if (value === UNSET) {
           value = null;
         }
diff --git a/packages/designer/src/document/node/root-node.ts b/packages/designer/src/document/node/root-node.ts
deleted file mode 100644
index d60e6c029..000000000
--- a/packages/designer/src/document/node/root-node.ts
+++ /dev/null
@@ -1,81 +0,0 @@
-import { RootSchema } from '@ali/lowcode-globals';
-import { Node, NodeParent } from './node';
-import { DocumentModel } from '../document-model';
-import { NodeChildren } from './node-children';
-
-/**
- * 根容器节点
- *
- * [Node Properties]
- *  componentName: Page/Block/Component
- *  props
- *  children
- *
- * [Root Container Extra Properties]
- *  fileName
- *  meta
- *  state
- *  defaultProps
- *  dataSource
- *  lifeCycles
- *  methods
- *  css
- *
- * [Directives **not used**]
- *  loop
- *  loopArgs
- *  condition
- *  ------- future support -----
- *  conditionGroup
- *  title
- *  ignore
- *  locked
- *  hidden
- */
-export class RootNode extends Node implements NodeParent {
-  readonly isRootNode = true;
-  get isNodeParent() {
-    return true;
-  }
-  get index() {
-    return 0;
-  }
-  get nextSibling() {
-    return null;
-  }
-  get prevSibling() {
-    return null;
-  }
-  get zLevel() {
-    return 0;
-  }
-  get parent() {
-    return null;
-  }
-  get children(): NodeChildren {
-    return this._children as NodeChildren;
-  }
-  internalSetParent(parent: null) {
-    // empty
-  }
-
-  constructor(readonly document: DocumentModel, rootSchema: RootSchema) {
-    super(document, rootSchema);
-  }
-
-  isPage() {
-    return this.componentName === 'Page';
-  }
-
-  isComponent() {
-    return this.componentName === 'Component';
-  }
-
-  isBlock() {
-    return this.componentName === 'Block';
-  }
-}
-
-export function isRootNode(node: any): node is RootNode {
-  return node && node.isRootNode;
-}
diff --git a/packages/globals/src/types/schema.ts b/packages/globals/src/types/schema.ts
index 74f8d9e74..1a8c3f091 100644
--- a/packages/globals/src/types/schema.ts
+++ b/packages/globals/src/types/schema.ts
@@ -13,6 +13,13 @@ export interface NodeSchema {
   loop?: CompositeValue;
   loopArgs?: [string, string];
   children?: NodeData | NodeData[];
+
+  // ------- future support -----
+  conditionGroup?: string;
+  title?: string;
+  ignore?: boolean;
+  locked?: boolean;
+  hidden?: boolean;
 }
 
 export type PropsMap = CompositeObject;
@@ -30,7 +37,7 @@ export function isDOMText(data: any): data is DOMText {
 
 export type DOMText = string;
 
-export interface RootSchema extends NodeSchema {
+export interface ContainerSchema extends NodeSchema {
   componentName: string; // 'Block' | 'Page' | 'Component';
   fileName: string;
   meta?: object;
@@ -48,18 +55,24 @@ export interface RootSchema extends NodeSchema {
   defaultProps?: CompositeObject;
 }
 
-export interface BlockSchema extends RootSchema {
-  componentName: 'Block';
-}
-
-export interface PageSchema extends RootSchema {
+export interface PageSchema extends ContainerSchema {
   componentName: 'Page';
 }
 
-export interface ComponentSchema extends RootSchema {
+export interface ComponentSchema extends ContainerSchema {
   componentName: 'Component';
 }
 
+export type RootSchema = PageSchema | ComponentSchema;
+
+export interface BlockSchema extends NodeSchema {
+  componentName: 'Block';
+}
+export interface SlotSchema extends NodeSchema {
+  componentName: 'Slot';
+  params?: string[];
+}
+
 export interface ProjectSchema {
   version: string;
   componentsMap: ComponentsMap;
diff --git a/packages/globals/src/types/value-type.ts b/packages/globals/src/types/value-type.ts
index f12f52266..145722eff 100644
--- a/packages/globals/src/types/value-type.ts
+++ b/packages/globals/src/types/value-type.ts
@@ -1,4 +1,4 @@
-import { NodeSchema } from './schema';
+import { NodeSchema, NodeData } from './schema';
 
 // 表达式
 export interface JSExpression {
@@ -15,9 +15,10 @@ export interface JSExpression {
 
 export interface JSSlot {
   type: 'JSSlot';
+  title?: string;
   // 函数的入参
   params?: string[];
-  value: NodeSchema[];
+  value?: NodeData[] | NodeData;
 }
 
 // JSON 基本类型
diff --git a/packages/plugin-outline-pane/src/helper/dwell-timer.ts b/packages/plugin-outline-pane/src/helper/dwell-timer.ts
index 64e5e0965..cd29f4c6b 100644
--- a/packages/plugin-outline-pane/src/helper/dwell-timer.ts
+++ b/packages/plugin-outline-pane/src/helper/dwell-timer.ts
@@ -1,16 +1,16 @@
-import { NodeParent, DropLocation, isLocationChildrenDetail, LocateEvent } from '@ali/lowcode-designer';
+import { ParentalNode, DropLocation, isLocationChildrenDetail, LocateEvent } from '@ali/lowcode-designer';
 
 /**
  * 停留检查计时器
  */
 export default class DwellTimer {
   private timer: number | undefined;
-  private previous?: NodeParent;
+  private previous?: ParentalNode;
   private event?: LocateEvent;
 
-  constructor(private decide: (node: NodeParent, event: LocateEvent) => void, private timeout: number = 500) {}
+  constructor(private decide: (node: ParentalNode, event: LocateEvent) => void, private timeout: number = 500) {}
 
-  focus(node: NodeParent, event: LocateEvent) {
+  focus(node: ParentalNode, event: LocateEvent) {
     this.event = event;
     if (this.previous === node) {
       return;
diff --git a/packages/plugin-outline-pane/src/helper/indent-track.ts b/packages/plugin-outline-pane/src/helper/indent-track.ts
index f8d0eb3ad..373b59931 100644
--- a/packages/plugin-outline-pane/src/helper/indent-track.ts
+++ b/packages/plugin-outline-pane/src/helper/indent-track.ts
@@ -1,4 +1,4 @@
-import { DropLocation, NodeParent, isLocationChildrenDetail } from '@ali/lowcode-designer';
+import { DropLocation, ParentalNode, isLocationChildrenDetail } from '@ali/lowcode-designer';
 
 const IndentSensitive = 15;
 export class IndentTrack {
@@ -6,7 +6,7 @@ export class IndentTrack {
   reset() {
     this.indentStart = null;
   }
-  getIndentParent(lastLoc: DropLocation, loc: DropLocation): [NodeParent, number] | null {
+  getIndentParent(lastLoc: DropLocation, loc: DropLocation): [ParentalNode, number] | null {
     if (
       lastLoc.target !== loc.target ||
       !isLocationChildrenDetail(lastLoc.detail) ||
@@ -33,7 +33,7 @@ export class IndentTrack {
     const index = loc.detail.index;
 
     if (direction === 'left') {
-      if (!parent.parent || parent.isSlotRoot || index < parent.children.size) {
+      if (parent.isSlot() || !parent.parent || index < parent.children.size) {
         return null;
       }
       return [parent.parent, parent.index + 1];
diff --git a/packages/plugin-outline-pane/src/main.ts b/packages/plugin-outline-pane/src/main.ts
index d603acff7..c3c94ce0f 100644
--- a/packages/plugin-outline-pane/src/main.ts
+++ b/packages/plugin-outline-pane/src/main.ts
@@ -13,7 +13,7 @@ import {
   isLocationChildrenDetail,
   LocationChildrenDetail,
   LocationDetailType,
-  NodeParent,
+  ParentalNode,
   contains,
   Node,
 } from '@ali/lowcode-designer';
@@ -199,7 +199,7 @@ export class OutlineMain implements ISensor, IScrollBoard, IScrollable {
     let index: any;
     let focus: any;
     let valid = true;
-    if (target.isSlotContainer()) {
+    if (target.hasSlots()) {
       index = null;
       focus = { type: 'slots' };
     } else {
@@ -301,7 +301,7 @@ export class OutlineMain implements ISensor, IScrollBoard, IScrollable {
         if (focusSlots) {
           this.dwell.reset();
           return designer.createLocation({
-            target: node as NodeParent,
+            target: node as ParentalNode,
             source: this.id,
             event: e,
             detail: {
@@ -342,9 +342,9 @@ export class OutlineMain implements ISensor, IScrollBoard, IScrollable {
       index = node.index;
     }
 
-    if (node.isSlotRoot) {
+    if (node.isSlot()) {
       // 是个插槽根节点
-      if (!treeNode.isContainer() && !treeNode.isSlotContainer()) {
+      if (!treeNode.isContainer() && !treeNode.hasSlots()) {
         return designer.createLocation({
           target: node.parent!,
           source: this.id,
@@ -377,7 +377,7 @@ export class OutlineMain implements ISensor, IScrollBoard, IScrollable {
 
     let focusNode: Node | undefined;
     // focus
-    if (!expanded && (treeNode.isContainer() || treeNode.isSlotContainer())) {
+    if (!expanded && (treeNode.isContainer() || treeNode.hasSlots())) {
       focusNode = node;
     }
 
@@ -439,7 +439,7 @@ export class OutlineMain implements ISensor, IScrollBoard, IScrollable {
       return null;
     }
 
-    const container = treeNode.node as NodeParent;
+    const container = treeNode.node as ParentalNode;
     const detail: LocationChildrenDetail = {
       type: LocationDetailType.Children,
     };
@@ -449,10 +449,10 @@ export class OutlineMain implements ISensor, IScrollBoard, IScrollable {
       source: this.id,
       event: e,
     };
-    const isSlotContainer = treeNode.isSlotContainer();
+    const isSlotContainer = treeNode.hasSlots();
     const isContainer = treeNode.isContainer();
 
-    if (container.isSlotRoot && !treeNode.expanded) {
+    if (container.isSlot() && !treeNode.expanded) {
       // 未展开，直接定位到内部第一个节点
       if (isSlotContainer) {
         detail.index = null;
@@ -693,7 +693,7 @@ export class OutlineMain implements ISensor, IScrollBoard, IScrollable {
   }
 }
 
-function checkRecursion(parent: Node | undefined | null, dragObject: DragObject): parent is NodeParent {
+function checkRecursion(parent: Node | undefined | null, dragObject: DragObject): parent is ParentalNode {
   if (!parent) {
     return false;
   }
diff --git a/packages/plugin-outline-pane/src/tree-node.ts b/packages/plugin-outline-pane/src/tree-node.ts
index e3636f73f..c7d5f24d5 100644
--- a/packages/plugin-outline-pane/src/tree-node.ts
+++ b/packages/plugin-outline-pane/src/tree-node.ts
@@ -11,7 +11,7 @@ export default class TreeNode {
    * 是否可以展开
    */
   @computed get expandable(): boolean {
-    return this.hasChildren() || this.isSlotContainer() || this.dropDetail?.index != null;
+    return this.hasChildren() || this.hasSlots() || this.dropDetail?.index != null;
   }
 
   /**
@@ -169,51 +169,17 @@ export default class TreeNode {
   /**
    * 判断是否有"插槽"
    */
-  isSlotContainer(): boolean {
-    return this.node.isSlotContainer();
+  hasSlots(): boolean {
+    return this.node.hasSlots();
   }
 
   hasChildren(): boolean {
     return this.isContainer() && this.node.children?.notEmpty() ? true : false;
   }
 
-  /*
-  get xForValue() {
-    const node = this.node;
-    return isElementNode(node) && node.xforValue ? node.xforValue : null;
-  }
-
-  get flowHidden() {
-    return (this.node as ElementNode).flowHidden;
-  }
-
-  get flowIndex() {
-    return (this.node as ElementNode).flowIndex;
-  }
-
-  get conditionFlow() {
-    return (this.node as ElementNode).conditionFlow;
-  }
-
-  hasXIf() {
-    return hasConditionFlow(this.node);
-  }
-
-  hasXFor() {
-    const node = this.node;
-    return isElementNode(node) && node.xforFn;
-  }
-  */
-
   select(isMulti: boolean) {
     const node = this.node;
 
-    /*
-    if (this.hasXIf()) {
-      (node as ElementNode).setFlowVisible();
-    }
-    */
-
     const selection = node.document.selection;
     if (isMulti) {
       selection.add(node.id);
diff --git a/packages/plugin-outline-pane/src/views/tree-branches.tsx b/packages/plugin-outline-pane/src/views/tree-branches.tsx
index 15feda9dd..6193652d0 100644
--- a/packages/plugin-outline-pane/src/views/tree-branches.tsx
+++ b/packages/plugin-outline-pane/src/views/tree-branches.tsx
@@ -108,7 +108,7 @@ class TreeNodeSlots extends Component<{
   }
   render() {
     const { treeNode } = this.props;
-    if (!treeNode.isSlotContainer()) {
+    if (!treeNode.hasSlots()) {
       return null;
     }
     return (
diff --git a/packages/plugin-outline-pane/src/views/tree-title.tsx b/packages/plugin-outline-pane/src/views/tree-title.tsx
index 1669ddd71..516314f3c 100644
--- a/packages/plugin-outline-pane/src/views/tree-title.tsx
+++ b/packages/plugin-outline-pane/src/views/tree-title.tsx
@@ -66,7 +66,7 @@ export default class TreeTitle extends Component<{
     const { editing } = this.state;
     const isCNode = !treeNode.isRoot();
     const { node } = treeNode;
-    const isNodeParent = node.isNodeParent;
+    const isNodeParent = node.isParental();
     let style: any;
     if (isCNode) {
       const depth = treeNode.depth;
diff --git a/packages/plugin-settings-pane/src/setters/mixed-setter/style.less b/packages/plugin-settings-pane/src/setters/mixed-setter/style.less
index b64e6ef86..6efebb28c 100644
--- a/packages/plugin-settings-pane/src/setters/mixed-setter/style.less
+++ b/packages/plugin-settings-pane/src/setters/mixed-setter/style.less
@@ -17,7 +17,7 @@
       }
     }
   }
-  >.next-input {
+  .next-input,.next-date-picker {
     width: 100%;
   }
   &.lc-block-setter {
diff --git a/packages/react-renderer/src/engine/base.jsx b/packages/react-renderer/src/engine/base.jsx
index 60787073d..6bf45fe3f 100644
--- a/packages/react-renderer/src/engine/base.jsx
+++ b/packages/react-renderer/src/engine/base.jsx
@@ -386,6 +386,7 @@ export default class BaseEngine extends PureComponent {
   __parseProps = (props, self, path, info) => {
     const { schema, Comp, componentInfo = {} } = info;
     const propInfo = getValue(componentInfo.props, path);
+    // FIXME! 将这行逻辑外置，解耦，线上环境不要验证参数，调试环境可以有，通过传参自定义
     const propType = propInfo && propInfo.extra && propInfo.extra.propType;
     const ignoreParse = schema.__ignoreParse || [];
     const checkProps = (value) => {
diff --git a/packages/react-simulator-renderer/src/builtin-components.ts b/packages/react-simulator-renderer/src/builtin-components/builtin-components.ts
similarity index 100%
rename from packages/react-simulator-renderer/src/builtin-components.ts
rename to packages/react-simulator-renderer/src/builtin-components/builtin-components.ts
diff --git a/packages/react-simulator-renderer/src/builtin-components/leaf.tsx b/packages/react-simulator-renderer/src/builtin-components/leaf.tsx
new file mode 100644
index 000000000..a199ddfe4
--- /dev/null
+++ b/packages/react-simulator-renderer/src/builtin-components/leaf.tsx
@@ -0,0 +1,23 @@
+import { Component } from 'react';
+
+class Leaf extends Component {
+  static displayName = 'Leaf';
+  static componentMetadata = {
+    componentName: 'Leaf',
+    configure: {
+      props: [{
+        name: 'children',
+        setter: 'StringSetter',
+      }],
+      // events/className/style/general/directives
+      supports: false,
+    }
+  };
+
+  render() {
+    const { children } = this.props;
+    return children;
+  }
+}
+
+export default Leaf;
diff --git a/packages/react-simulator-renderer/src/builtin-components/slot.tsx b/packages/react-simulator-renderer/src/builtin-components/slot.tsx
new file mode 100644
index 000000000..107864d52
--- /dev/null
+++ b/packages/react-simulator-renderer/src/builtin-components/slot.tsx
@@ -0,0 +1,53 @@
+import { Component } from 'react';
+
+class Slot extends Component {
+  static displayName = 'Slot';
+  static componentMetadata = {
+    componentName: 'Slot',
+    configure: {
+      props: [{
+        name: '___title___',
+        title: {
+          type: 'i18n',
+          'en-US': 'Slot Title',
+          'zh-CN': '插槽标题'
+        },
+        setter: 'StringSetter',
+        defaultValue: '插槽容器'
+      }, {
+        name: '___params___',
+        title: {
+          type: 'i18n',
+          'en-US': 'Slot Params',
+          'zh-CN': '插槽入参'
+        },
+        setter: {
+          componentName: 'ArraySetter',
+          props: {
+            itemSetter: {
+              componentName: 'StringSetter',
+              props: {
+                placeholder: {
+                  type: 'i18n',
+                  'zh-CN': '参数名称',
+                  'en-US': 'Argument Name'
+                }
+              }
+            }
+          }
+        }
+      }],
+      // events/className/style/general/directives
+      supports: false,
+    }
+  };
+
+  render() {
+    const { children } = this.props;
+    return (
+      <div className="lc-container">{children}</div>
+    );
+  }
+}
+
+export default Slot;
diff --git a/packages/react-simulator-renderer/src/renderer-view.tsx b/packages/react-simulator-renderer/src/renderer-view.tsx
index cf0617d28..230e3e302 100644
--- a/packages/react-simulator-renderer/src/renderer-view.tsx
+++ b/packages/react-simulator-renderer/src/renderer-view.tsx
@@ -41,6 +41,7 @@ class Renderer extends Component<{ renderer: SimulatorRenderer }> {
   }
   render() {
     const { renderer } = this.props;
+    console.info(renderer.schema)
     return (
       <LowCodeRenderer
         schema={renderer.schema}
diff --git a/packages/react-simulator-renderer/src/renderer.less b/packages/react-simulator-renderer/src/renderer.less
index cdd7772c9..00fa0e548 100644
--- a/packages/react-simulator-renderer/src/renderer.less
+++ b/packages/react-simulator-renderer/src/renderer.less
@@ -57,6 +57,29 @@ html.engine-blur #engine {
   -webkit-filter: blur(4px);
 }
 
+.lc-container {
+  &:empty {
+    background: #f2f3f5;
+    color: #a7b1bd;
+    outline: 1px dashed rgba(31, 56, 88, 0.2);
+    outline-offset: -1px !important;
+    height: 66px;
+    max-height: 100%;
+    min-width: 140px;
+    text-align: center;
+    overflow: hidden;
+    display: flex;
+    align-items: center;
+    &:before {
+      content: '\62D6\62FD\7EC4\4EF6\6216\6A21\677F\5230\8FD9\91CC';
+      font-size: 14px;
+      z-index: 1;
+      width: 100%;
+      white-space: nowrap;
+    }
+  }
+}
+
 .engine-empty {
   background: #f2f3f5;
   color: #a7b1bd;
diff --git a/packages/react-simulator-renderer/src/renderer.ts b/packages/react-simulator-renderer/src/renderer.ts
index 06e7787a2..54bf16a26 100644
--- a/packages/react-simulator-renderer/src/renderer.ts
+++ b/packages/react-simulator-renderer/src/renderer.ts
@@ -13,6 +13,8 @@ import { cursor } from '@ali/lowcode-globals';
 import { setNativeSelection } from '@ali/lowcode-globals';
 import { RootSchema, NpmInfo } from '@ali/lowcode-globals';
 import { BuiltinSimulatorRenderer, NodeInstance } from '@ali/lowcode-designer';
+import Slot from './builtin-components/slot';
+import Leaf from './builtin-components/leaf';
 
 export class SimulatorRenderer implements BuiltinSimulatorRenderer {
   readonly isSimulatorRenderer = true;
@@ -25,7 +27,7 @@ export class SimulatorRenderer implements BuiltinSimulatorRenderer {
       // sync layout config
 
       // sync schema
-      this._schema = host.document.schema;
+      this._schema = host.document.export(1);
 
       // todo: split with others, not all should recompute
       if (this._libraryMap !== host.libraryMap || this._componentsMap !== host.designer.componentsMap) {
@@ -311,8 +313,17 @@ export interface LibraryMap {
   [key: string]: string;
 }
 
+// Slot/Leaf and Fragment|FunctionComponent polyfill(ref)
+
+const builtinComponents = {
+  Slot,
+  Leaf,
+};
+
 function buildComponents(libraryMap: LibraryMap, componentsMap: { [componentName: string]: NpmInfo | ComponentType<any> }) {
-  const components: any = {};
+  const components: any = {
+    ...builtinComponents
+  };
   Object.keys(componentsMap).forEach((componentName) => {
     let component = componentsMap[componentName];
     if (isReactComponent(component)) {
diff --git a/packages/vision-polyfill/src/bundle/upgrade-metadata.ts b/packages/vision-polyfill/src/bundle/upgrade-metadata.ts
index 0c4ac65cf..b9da6eb35 100644
--- a/packages/vision-polyfill/src/bundle/upgrade-metadata.ts
+++ b/packages/vision-polyfill/src/bundle/upgrade-metadata.ts
@@ -304,13 +304,24 @@ export function upgradePropConfig(config: OldPropConfig) {
     extraProps.defaultValue = initialValue;
   }
 
-  const initialFn = initial || initialValue;
+  let initialFn = initial || initialValue;
+
+  if (accessor) {
+    extraProps.getValue = (field: Field, fieldValue: any) => {
+      return accessor.call(field, fieldValue);
+    };
+    if (!initialFn) {
+      // FIXME!
+      initialFn
+    }
+  }
   extraProps.initialValue = (field: Field, defaultValue?: any) => {
     if (defaultValue === undefined) {
       defaultValue = extraProps.defaultValue;
     }
 
     if (typeof initialFn === 'function') {
+      // ?
       return initialFn(null, defaultValue);
     }
 
@@ -325,11 +336,6 @@ export function upgradePropConfig(config: OldPropConfig) {
       }
     }
   }
-  if (accessor) {
-    extraProps.getValue = (field: Field, fieldValue: any) => {
-      return accessor.call(field, fieldValue);
-    };
-  }
   if (mutator) {
     extraProps.setValue = (field: Field, value: any) => {
       mutator.call(field, value);
@@ -535,9 +541,17 @@ export function upgradeMetadata(oldConfig: OldPrototypeConfig) {
     experimental.context = context;
   }
   if (snippets) {
-    experimental.snippets = snippets;
-  }
-  if (defaultProps || initialChildren) {
+    experimental.snippets = snippets.map(data => {
+      const { schema = {} } = data;
+      if (initialChildren && !schema.children) {
+        schema.children = initialChildren;
+      }
+      return {
+        ...data,
+        schema,
+      };
+    });
+  } else if (defaultProps || initialChildren) {
     const snippet = {
       screenshot: icon,
       label: title,
diff --git a/packages/vision-polyfill/src/bus.ts b/packages/vision-polyfill/src/bus.ts
index 278a1b82e..c8554d99f 100644
--- a/packages/vision-polyfill/src/bus.ts
+++ b/packages/vision-polyfill/src/bus.ts
@@ -19,6 +19,7 @@ export class Bus {
   // alias to unsub
   off(event: string, func: (...args: any[]) => any) {
     this.unsub(event, func);
+
   }
 
   // alias to pub
diff --git a/packages/vision-polyfill/src/drag-engine.ts b/packages/vision-polyfill/src/drag-engine.ts
index e905e86f4..6c3bf752b 100644
--- a/packages/vision-polyfill/src/drag-engine.ts
+++ b/packages/vision-polyfill/src/drag-engine.ts
@@ -1,5 +1,5 @@
 import { designer } from './editor';
-import { DragObjectType, isNode } from '@ali/lowcode-designer';
+import { DragObjectType, isNode, ExportType } from '@ali/lowcode-designer';
 
 const dragon = designer.dragon;
 const DragEngine = {
@@ -12,14 +12,16 @@ const DragEngine = {
       if (isNode(r)) {
         return {
           type: DragObjectType.NodeData,
-          data: r.export(false),
+          data: r.export(ExportType.ForSave),
         };
+
         // FIXME! designer has bug
         /*
         return {
           type: DragObjectType.Node,
           nodes: [r],
-        };*/
+        };
+        */
       } else {
         return {
           type: DragObjectType.NodeData,