diff --git a/packages/ava/src/ntv/schema/common.ts b/packages/ava/src/ntv/schema/common.ts
index 2b0ff43c..7d2007f1 100644
--- a/packages/ava/src/ntv/schema/common.ts
+++ b/packages/ava/src/ntv/schema/common.ts
@@ -11,6 +11,7 @@ export type CommonProps = {
 export type CustomBlockElement = CommonProps & {
   // customType is required for custom block structure
   customType: string;
+  metadata?: BlockMetaData;
   [key: string]: unknown;
 };
 
@@ -20,3 +21,10 @@ export type CustomMetaData = {
   customType: string;
   [key: string]: unknown;
 };
+
+/** block element (section,paragraph) metadata info */
+export type BlockMetaData = Partial<{
+  /** if element is generate by loop */
+  loopId: string;
+  // TODO 之后这里还会扩展条件判断等...
+}>;
diff --git a/packages/ava/src/ntv/schema/paragraph.ts b/packages/ava/src/ntv/schema/paragraph.ts
index 26b0a56d..b9dbe9b6 100644
--- a/packages/ava/src/ntv/schema/paragraph.ts
+++ b/packages/ava/src/ntv/schema/paragraph.ts
@@ -1,5 +1,5 @@
 import type { PhraseSpec } from './phrase';
-import type { CommonProps, CustomBlockElement } from './common';
+import type { CommonProps, CustomBlockElement, BlockMetaData } from './common';
 
 export type ParagraphSpec = HeadingParagraphSpec | TextParagraphSpec | BulletsParagraphSpec | CustomBlockElement;
 
@@ -25,12 +25,14 @@ export type TextParagraphSpec = CommonProps & {
   type: 'normal';
   phrases: PhraseSpec[];
   indents?: ParagraphIndent[];
+  metadata?: BlockMetaData;
 };
 
 export type BulletsParagraphSpec = CommonProps & {
   type: 'bullets';
   isOrder: boolean;
   bullets: BulletItemSpec[];
+  metadata?: BlockMetaData;
 };
 
 export type BulletItemSpec = CommonProps & {
@@ -38,4 +40,5 @@ export type BulletItemSpec = CommonProps & {
   phrases: PhraseSpec[];
   // nested list
   subBullet?: BulletsParagraphSpec;
+  metadata?: BlockMetaData;
 };
diff --git a/packages/ava/src/ntv/schema/structure.ts b/packages/ava/src/ntv/schema/structure.ts
index d5cb0c57..1e0b924a 100644
--- a/packages/ava/src/ntv/schema/structure.ts
+++ b/packages/ava/src/ntv/schema/structure.ts
@@ -1,4 +1,4 @@
-import type { CommonProps, CustomBlockElement } from './common';
+import type { CommonProps, CustomBlockElement, BlockMetaData } from './common';
 import type { PhraseSpec } from './phrase';
 import type { ParagraphSpec } from './paragraph';
 
@@ -12,8 +12,9 @@ export type HeadlineSpec = CommonProps & {
   phrases: PhraseSpec[];
 };
 
-export type StandardSectionSpec = {
+export type StandardSectionSpec = CommonProps & {
   paragraphs?: ParagraphSpec[];
+  metadata?: BlockMetaData;
 };
 
-export type SectionSpec = (StandardSectionSpec | CustomBlockElement) & CommonProps;
+export type SectionSpec = StandardSectionSpec | CustomBlockElement;