diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/appflowy_editor.dart b/frontend/app_flowy/packages/appflowy_editor/lib/appflowy_editor.dart
index bccfd7cb16..82d9ccf5a6 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/appflowy_editor.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/appflowy_editor.dart
@@ -10,7 +10,7 @@ export 'src/core/location/selection.dart';
 export 'src/core/state/document.dart';
 export 'src/core/document/text_delta.dart';
 export 'src/core/document/attributes.dart';
-export 'src/document/built_in_attribute_keys.dart';
+export 'src/core/legacy/built_in_attribute_keys.dart';
 export 'src/editor_state.dart';
 export 'src/operation/operation.dart';
 export 'src/operation/transaction.dart';
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/commands/format_built_in_text.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/commands/format_built_in_text.dart
index 320a0dd616..6a977bf2ef 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/commands/format_built_in_text.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/commands/format_built_in_text.dart
@@ -1,7 +1,7 @@
 import 'package:appflowy_editor/src/commands/format_text.dart';
 import 'package:appflowy_editor/src/commands/text_command_infra.dart';
 import 'package:appflowy_editor/src/core/document/attributes.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:appflowy_editor/src/core/document/node.dart';
 import 'package:appflowy_editor/src/core/document/path.dart';
 import 'package:appflowy_editor/src/core/location/selection.dart';
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/core/document/node.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/core/document/node.dart
index 68c27cd55b..bb52629054 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/core/document/node.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/core/document/node.dart
@@ -4,7 +4,7 @@ import 'package:flutter/material.dart';
 
 import 'package:appflowy_editor/src/core/document/attributes.dart';
 import 'package:appflowy_editor/src/core/document/path.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:appflowy_editor/src/core/document/text_delta.dart';
 
 class Node extends ChangeNotifier with LinkedListEntry<Node> {
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/document/built_in_attribute_keys.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/core/legacy/built_in_attribute_keys.dart
similarity index 100%
rename from frontend/app_flowy/packages/appflowy_editor/lib/src/document/built_in_attribute_keys.dart
rename to frontend/app_flowy/packages/appflowy_editor/lib/src/core/legacy/built_in_attribute_keys.dart
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/core/state/document.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/core/state/document.dart
index 3fc5043aa2..7553e424ca 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/core/state/document.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/core/state/document.dart
@@ -1,9 +1,9 @@
 import 'dart:collection';
 
+import 'package:appflowy_editor/src/core/document/attributes.dart';
 import 'package:appflowy_editor/src/core/document/node.dart';
 import 'package:appflowy_editor/src/core/document/path.dart';
 import 'package:appflowy_editor/src/core/document/text_delta.dart';
-import '../document/attributes.dart';
 
 /// [Document] reprensents a AppFlowy Editor document structure.
 ///
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/attributes_extension.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/attributes_extension.dart
index 403a007d7f..816747fdad 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/attributes_extension.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/attributes_extension.dart
@@ -1,5 +1,5 @@
 import 'package:appflowy_editor/src/core/document/attributes.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:flutter/material.dart';
 
 extension NodeAttributesExtensions on Attributes {
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/text_node_extensions.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/text_node_extensions.dart
index 9ceff7e373..48538f8bfb 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/text_node_extensions.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/extensions/text_node_extensions.dart
@@ -3,7 +3,7 @@ import 'package:appflowy_editor/src/core/document/path.dart';
 import 'package:appflowy_editor/src/core/location/position.dart';
 import 'package:appflowy_editor/src/core/location/selection.dart';
 import 'package:appflowy_editor/src/core/document/text_delta.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 
 extension TextNodeExtension on TextNode {
   T? getAttributeInSelection<T>(Selection selection, String styleKey) {
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/infra/html_converter.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/infra/html_converter.dart
index 2d00d369ce..b433657d4e 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/infra/html_converter.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/infra/html_converter.dart
@@ -8,7 +8,7 @@ import 'package:appflowy_editor/src/extensions/color_extension.dart';
 import 'package:flutter/material.dart';
 import 'package:html/parser.dart' show parse;
 import 'package:html/dom.dart' as html;
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 
 class HTMLTag {
   static const h1 = "h1";
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/render/selection_menu/selection_menu_service.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/render/selection_menu/selection_menu_service.dart
index 4da824db80..614546ef99 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/render/selection_menu/selection_menu_service.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/render/selection_menu/selection_menu_service.dart
@@ -6,7 +6,7 @@ import 'package:appflowy_editor/src/render/selection_menu/selection_menu_widget.
 import 'package:appflowy_editor/src/service/default_text_operations/format_rich_text_style.dart';
 
 import 'package:flutter/material.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 
 abstract class SelectionMenuService {
   Offset get topLeft;
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/service/default_text_operations/format_rich_text_style.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/service/default_text_operations/format_rich_text_style.dart
index ac9670173e..7ac67f0cfd 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/service/default_text_operations/format_rich_text_style.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/service/default_text_operations/format_rich_text_style.dart
@@ -6,7 +6,7 @@ import 'package:appflowy_editor/src/core/location/selection.dart';
 import 'package:appflowy_editor/src/editor_state.dart';
 import 'package:appflowy_editor/src/extensions/text_node_extensions.dart';
 import 'package:appflowy_editor/src/operation/transaction_builder.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 
 void insertHeadingAfterSelection(EditorState editorState, String heading) {
   insertTextNodeAfterSelection(editorState, {
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/number_list_helper.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/number_list_helper.dart
index 6bb51bce31..b03505a62e 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/number_list_helper.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/number_list_helper.dart
@@ -1,6 +1,6 @@
 import 'package:appflowy_editor/src/core/location/selection.dart';
 import 'package:appflowy_editor/src/editor_state.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:appflowy_editor/src/operation/transaction_builder.dart';
 import 'package:appflowy_editor/src/core/document/attributes.dart';
 
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/whitespace_handler.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/whitespace_handler.dart
index de6f4d946c..09cc802516 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/whitespace_handler.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/service/internal_key_event_handlers/whitespace_handler.dart
@@ -1,7 +1,7 @@
 import 'package:appflowy_editor/src/service/shortcut_event/shortcut_event_handler.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:appflowy_editor/src/document/built_in_attribute_keys.dart';
+import 'package:appflowy_editor/src/core/legacy/built_in_attribute_keys.dart';
 import 'package:appflowy_editor/src/core/document/node.dart';
 import 'package:appflowy_editor/src/core/location/position.dart';
 import 'package:appflowy_editor/src/core/location/selection.dart';