diff --git a/data/schemas/schemas_microsoft_com_office_powerpoint_2018_8_main.json b/data/schemas/schemas_microsoft_com_office_powerpoint_2018_8_main.json
index f1b5a11ab..d5ef46deb 100644
--- a/data/schemas/schemas_microsoft_com_office_powerpoint_2018_8_main.json
+++ b/data/schemas/schemas_microsoft_com_office_powerpoint_2018_8_main.json
@@ -64,18 +64,33 @@
       "Version": "Office2021",
       "Children": [
         {
-          "Name": "p188:CT_CommentPropertiesExtension/p188:ext"
+          "Name": "p188:CT_CommentPropertiesExtension/p:ext"
         }
       ],
       "Particle": {
         "Kind": "Sequence",
         "Items": [
           {
-            "Name": "p188:CT_CommentPropertiesExtension/p188:ext",
+            "Kind": "Group",
             "Occurs": [
-              {}
+              {
+                "Max": 1
+              }
             ],
-            "InitialVersion": "Microsoft365"
+            "Items": [
+              {
+                "Kind": "Sequence",
+                "Items": [
+                  {
+                    "Name": "p188:CT_CommentPropertiesExtension/p:ext",
+                    "Occurs": [
+                      {}
+                    ],
+                    "InitialVersion": "Office2021"
+                  }
+                ]
+              }
+            ]
           }
         ]
       }
@@ -839,47 +854,6 @@
           }
         ]
       }
-    },
-    {
-      "Name": "p188:CT_CommentPropertiesExtension/p188:ext",
-      "ClassName": "CommentPropertiesExtension",
-      "Summary": "Defines the CommentPropertiesExtension Class.",
-      "CompositeType": "OneSequence",
-      "BaseClass": "OpenXmlCompositeElement",
-      "Version": "Microsoft365",
-      "Children": [
-        {
-          "Name": "p228:CT_TaskDetails/p228:taskDetails",
-          "PropertyName": "TaskDetails"
-        },
-        {
-          "Name": "p223:CT_Reactions/p223:reactions",
-          "PropertyName": "Reactions"
-        }
-      ],
-      "Particle": {
-        "Kind": "Sequence",
-        "Items": [
-          {
-            "Name": "p228:CT_TaskDetails/p228:taskDetails",
-            "Occurs": [
-              {
-                "Max": 1
-              }
-            ],
-            "InitialVersion": "Microsoft365"
-          },
-          {
-            "Name": "p223:CT_Reactions/p223:reactions",
-            "Occurs": [
-              {
-                "Max": 1
-              }
-            ],
-            "InitialVersion": "Microsoft365"
-          }
-        ]
-      }
     }
   ],
   "Enums": [
diff --git a/data/schemas/schemas_openxmlformats_org_presentationml_2006_main.json b/data/schemas/schemas_openxmlformats_org_presentationml_2006_main.json
index 5571bf0ca..21acb2e95 100644
--- a/data/schemas/schemas_openxmlformats_org_presentationml_2006_main.json
+++ b/data/schemas/schemas_openxmlformats_org_presentationml_2006_main.json
@@ -773,6 +773,47 @@
         ]
       }
     },
+    {
+      "Name": "p188:CT_CommentPropertiesExtension/p:ext",
+      "ClassName": "CommentPropertiesExtension",
+      "Summary": "Data for the Windows platform..",
+      "CompositeType": "OneSequence",
+      "BaseClass": "OpenXmlCompositeElement",
+      "Version": "Office2021",
+      "Children": [
+        {
+          "Name": "p228:CT_TaskDetails/p228:taskDetails",
+          "PropertyName": "TaskDetails"
+        },
+        {
+          "Name": "p223:CT_Reactions/p223:reactions",
+          "PropertyName": "Reactions"
+        }
+      ],
+      "Particle": {
+        "Kind": "Sequence",
+        "Items": [
+          {
+            "Name": "p228:CT_TaskDetails/p228:taskDetails",
+            "Occurs": [
+              {
+                "Max": 1
+              }
+            ],
+            "InitialVersion": "Microsoft365"
+          },
+          {
+            "Name": "p223:CT_Reactions/p223:reactions",
+            "Occurs": [
+              {
+                "Max": 1
+              }
+            ],
+            "InitialVersion": "Microsoft365"
+          }
+        ]
+      }
+    },
     {
       "Name": "p:CT_CommentAuthorList/p:cmAuthorLst",
       "ClassName": "CommentAuthorList",
diff --git a/data/typed/schemas_microsoft_com_office_powerpoint_2018_8_main.json b/data/typed/schemas_microsoft_com_office_powerpoint_2018_8_main.json
index 2c2c1bc6a..aee23545c 100644
--- a/data/typed/schemas_microsoft_com_office_powerpoint_2018_8_main.json
+++ b/data/typed/schemas_microsoft_com_office_powerpoint_2018_8_main.json
@@ -21,10 +21,6 @@
     "Name": "p188:CT_CommentRelationship/p188:commentRel",
     "ClassName": "CommentRelationship"
   },
-  {
-    "Name": "p188:CT_CommentPropertiesExtension/p188:ext",
-    "ClassName": "CommentPropertiesExtension"
-  },
   {
     "Name": "p188:CT_CommentPropertiesExtensionList/p188:extLst",
     "ClassName": "CommentPropertiesExtensionList"
diff --git a/data/typed/schemas_openxmlformats_org_presentationml_2006_main.json b/data/typed/schemas_openxmlformats_org_presentationml_2006_main.json
index a15acf7ac..c3f2687da 100644
--- a/data/typed/schemas_openxmlformats_org_presentationml_2006_main.json
+++ b/data/typed/schemas_openxmlformats_org_presentationml_2006_main.json
@@ -389,6 +389,10 @@
     "Name": "p:CT_CommentExtension/p:ext",
     "ClassName": "CommentExtension"
   },
+  {
+    "Name": "p188:CT_CommentPropertiesExtension/p:ext",
+    "ClassName": "CommentPropertiesExtension"
+  },
   {
     "Name": "p:CT_CommonSlideDataExtension/p:ext",
     "ClassName": "CommonSlideDataExtension"
diff --git a/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P.g.cs b/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P.g.cs
index cb2d5ba36..3cf5b2f1a 100644
--- a/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P.g.cs
+++ b/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P.g.cs
@@ -1000,9 +1000,9 @@ public static partial class P
         /// <para>As an XML element, it:</para>
         /// <list type="bullet">
         /// <item><description>has the following parent XML elements: <see cref="extLst" />, <see cref="P14.extLst" />, <see cref="P15.extLst" />, <see cref="P188.extLst" />, <see cref="P1912.extLst" />, <see cref="P223.extLst" />, <see cref="P228.extLst" />.</description></item>
-        /// <item><description>has the following child XML elements: <see cref="A14.m" />, <see cref="P14.browseMode" />, <see cref="P14.creationId" />, <see cref="P14.defaultImageDpi" />, <see cref="P14.discardImageEditData" />, <see cref="P14.laserClr" />, <see cref="P14.laserTraceLst" />, <see cref="P14.media" />, <see cref="P14.modId" />, <see cref="P14.sectionLst" />, <see cref="P14.sectionPr" />, <see cref="P14.showEvtLst" />, <see cref="P14.showMediaCtrls" />, <see cref="P15.chartTrackingRefBased" />, <see cref="P15.notesGuideLst" />, <see cref="P15.presenceInfo" />, <see cref="P15.sldGuideLst" />, <see cref="P15.threadingInfo" />, <see cref="P188.commentRel" />.</description></item>
+        /// <item><description>has the following child XML elements: <see cref="A14.m" />, <see cref="P14.browseMode" />, <see cref="P14.creationId" />, <see cref="P14.defaultImageDpi" />, <see cref="P14.discardImageEditData" />, <see cref="P14.laserClr" />, <see cref="P14.laserTraceLst" />, <see cref="P14.media" />, <see cref="P14.modId" />, <see cref="P14.sectionLst" />, <see cref="P14.sectionPr" />, <see cref="P14.showEvtLst" />, <see cref="P14.showMediaCtrls" />, <see cref="P15.chartTrackingRefBased" />, <see cref="P15.notesGuideLst" />, <see cref="P15.presenceInfo" />, <see cref="P15.sldGuideLst" />, <see cref="P15.threadingInfo" />, <see cref="P188.commentRel" />, <see cref="P223.reactions" />, <see cref="P228.taskDetails" />.</description></item>
         /// <item><description>has the following XML attributes: <see cref="NoNamespace.uri" />.</description></item>
-        /// <item><description>corresponds to the following strongly-typed classes: ApplicationNonVisualDrawingPropertiesExtension, CommentAuthorExtension, CommentExtension, CommonSlideDataExtension, Extension, HandoutMasterExtension, NotesMasterExtension, PresentationExtension, PresentationPropertiesExtension, ShowPropertiesExtension, SlideExtension, SlideLayoutExtension, SlideMasterExtension.</description></item>
+        /// <item><description>corresponds to the following strongly-typed classes: ApplicationNonVisualDrawingPropertiesExtension, CommentAuthorExtension, CommentExtension, CommentPropertiesExtension, CommonSlideDataExtension, Extension, HandoutMasterExtension, NotesMasterExtension, PresentationExtension, PresentationPropertiesExtension, ShowPropertiesExtension, SlideExtension, SlideLayoutExtension, SlideMasterExtension.</description></item>
         /// </list>
         /// </remarks>
         public static readonly XName ext = p + "ext";
diff --git a/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P188.g.cs b/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P188.g.cs
index a6c5e0a13..db91f472d 100644
--- a/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P188.g.cs
+++ b/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P188.g.cs
@@ -82,19 +82,6 @@ public static partial class P188
         /// </remarks>
         public static readonly XName commentRel = p188 + "commentRel";
 
-        /// <summary>
-        /// Represents the p188:ext XML element.
-        /// </summary>
-        /// <remarks>
-        /// <para>As an XML element, it:</para>
-        /// <list type="bullet">
-        /// <item><description>has the following parent XML elements: <see cref="extLst" />.</description></item>
-        /// <item><description>has the following child XML elements: <see cref="P223.reactions" />, <see cref="P228.taskDetails" />.</description></item>
-        /// <item><description>corresponds to the following strongly-typed classes: CommentPropertiesExtension.</description></item>
-        /// </list>
-        /// </remarks>
-        public static readonly XName ext = p188 + "ext";
-
         /// <summary>
         /// Represents the p188:extLst XML elements.
         /// </summary>
@@ -102,7 +89,7 @@ public static partial class P188
         /// <para>As an XML element, it:</para>
         /// <list type="bullet">
         /// <item><description>has the following parent XML elements: <see cref="author" />, <see cref="cm" />, <see cref="reply" />.</description></item>
-        /// <item><description>has the following child XML elements: <see cref="P.ext" />, <see cref="ext" />.</description></item>
+        /// <item><description>has the following child XML elements: <see cref="P.ext" />.</description></item>
         /// <item><description>corresponds to the following strongly-typed classes: CommentPropertiesExtensionList, ExtensionList.</description></item>
         /// </list>
         /// </remarks>
diff --git a/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P223.g.cs b/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P223.g.cs
index 2a9fc8084..9d9721b3e 100644
--- a/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P223.g.cs
+++ b/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P223.g.cs
@@ -48,7 +48,7 @@ public static partial class P223
         /// <remarks>
         /// <para>As an XML element, it:</para>
         /// <list type="bullet">
-        /// <item><description>has the following parent XML elements: <see cref="A.graphicData" />, <see cref="P188.ext" />.</description></item>
+        /// <item><description>has the following parent XML elements: <see cref="A.graphicData" />, <see cref="P.ext" />.</description></item>
         /// <item><description>has the following child XML elements: <see cref="rxn" />.</description></item>
         /// <item><description>corresponds to the following strongly-typed classes: Reactions.</description></item>
         /// </list>
diff --git a/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P228.g.cs b/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P228.g.cs
index 9f5ca855d..004b6c045 100644
--- a/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P228.g.cs
+++ b/generated/DocumentFormat.OpenXml.Linq/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/Linq.P228.g.cs
@@ -149,7 +149,7 @@ public static partial class P228
         /// <remarks>
         /// <para>As an XML element, it:</para>
         /// <list type="bullet">
-        /// <item><description>has the following parent XML elements: <see cref="A.graphicData" />, <see cref="P188.ext" />.</description></item>
+        /// <item><description>has the following parent XML elements: <see cref="A.graphicData" />, <see cref="P.ext" />.</description></item>
         /// <item><description>has the following child XML elements: <see cref="extLst" />, <see cref="history" />.</description></item>
         /// <item><description>has the following XML attributes: <see cref="NoNamespace.deleted" />, <see cref="NoNamespace.inactive" />.</description></item>
         /// <item><description>corresponds to the following strongly-typed classes: TaskDetails.</description></item>
diff --git a/generated/DocumentFormat.OpenXml/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/schemas_microsoft_com_office_powerpoint_2018_8_main.g.cs b/generated/DocumentFormat.OpenXml/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/schemas_microsoft_com_office_powerpoint_2018_8_main.g.cs
index df2914be8..5f7a0ed5f 100644
--- a/generated/DocumentFormat.OpenXml/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/schemas_microsoft_com_office_powerpoint_2018_8_main.g.cs
+++ b/generated/DocumentFormat.OpenXml/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/schemas_microsoft_com_office_powerpoint_2018_8_main.g.cs
@@ -9,8 +9,6 @@
 using DocumentFormat.OpenXml.Drawing;
 using DocumentFormat.OpenXml.Framework;
 using DocumentFormat.OpenXml.Framework.Metadata;
-using DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main;
-using DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main;
 using DocumentFormat.OpenXml.Office2016.Drawing.Command;
 using DocumentFormat.OpenXml.Office2016.Presentation.Command;
 using DocumentFormat.OpenXml.Packaging;
@@ -147,7 +145,7 @@ public DocumentFormat.OpenXml.Drawing.ListStyle? ListStyle
     /// <remark>
     /// <para>The following table lists the possible child types:</para>
     /// <list type="bullet">
-    ///   <item><description><see cref="DocumentFormat.OpenXml.Office2021.PowerPoint.Comment.CommentPropertiesExtension" /> <c>&lt;p188:ext></c></description></item>
+    ///   <item><description><see cref="DocumentFormat.OpenXml.Presentation.CommentPropertiesExtension" /> <c>&lt;p:ext></c></description></item>
     /// </list>
     /// </remark>
     public partial class CommentPropertiesExtensionList : OpenXmlCompositeElement
@@ -188,10 +186,16 @@ internal override void ConfigureMetadata(ElementMetadata.Builder builder)
             base.ConfigureMetadata(builder);
             builder.SetSchema("p188:extLst");
             builder.Availability = FileFormatVersions.Office2021;
-            builder.AddChild<DocumentFormat.OpenXml.Office2021.PowerPoint.Comment.CommentPropertiesExtension>();
+            builder.AddChild<DocumentFormat.OpenXml.Presentation.CommentPropertiesExtension>();
             builder.Particle = new CompositeParticle.Builder(ParticleType.Sequence, 1, 1)
             {
-                new ElementParticle(typeof(DocumentFormat.OpenXml.Office2021.PowerPoint.Comment.CommentPropertiesExtension), 0, 0, version: FileFormatVersions.Microsoft365)
+                new CompositeParticle.Builder(ParticleType.Group, 0, 1)
+                {
+                    new CompositeParticle.Builder(ParticleType.Sequence, 1, 1)
+                    {
+                        new ElementParticle(typeof(DocumentFormat.OpenXml.Presentation.CommentPropertiesExtension), 0, 0, version: FileFormatVersions.Office2021)
+                    }
+                }
             };
         }
 
@@ -1188,95 +1192,6 @@ internal override void ConfigureMetadata(ElementMetadata.Builder builder)
         public override OpenXmlElement CloneNode(bool deep) => CloneImp<Comment>(deep);
     }
 
-    /// <summary>
-    /// <para>Defines the CommentPropertiesExtension Class.</para>
-    /// <para>This class is available in Microsoft365 and above.</para>
-    /// <para>When the object is serialized out as xml, it's qualified name is p188:ext.</para>
-    /// </summary>
-    /// <remark>
-    /// <para>The following table lists the possible child types:</para>
-    /// <list type="bullet">
-    ///   <item><description><see cref="DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions" /> <c>&lt;p223:reactions></c></description></item>
-    ///   <item><description><see cref="DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails" /> <c>&lt;p228:taskDetails></c></description></item>
-    /// </list>
-    /// </remark>
-    public partial class CommentPropertiesExtension : OpenXmlCompositeElement
-    {
-        /// <summary>
-        /// Initializes a new instance of the CommentPropertiesExtension class.
-        /// </summary>
-        public CommentPropertiesExtension() : base()
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the CommentPropertiesExtension class with the specified child elements.
-        /// </summary>
-        /// <param name="childElements">Specifies the child elements.</param>
-        public CommentPropertiesExtension(IEnumerable<OpenXmlElement> childElements) : base(childElements)
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the CommentPropertiesExtension class with the specified child elements.
-        /// </summary>
-        /// <param name="childElements">Specifies the child elements.</param>
-        public CommentPropertiesExtension(params OpenXmlElement[] childElements) : base(childElements)
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the CommentPropertiesExtension class from outer XML.
-        /// </summary>
-        /// <param name="outerXml">Specifies the outer XML of the element.</param>
-        public CommentPropertiesExtension(string outerXml) : base(outerXml)
-        {
-        }
-
-        internal override void ConfigureMetadata(ElementMetadata.Builder builder)
-        {
-            base.ConfigureMetadata(builder);
-            builder.SetSchema("p188:ext");
-            builder.Availability = FileFormatVersions.Microsoft365;
-            builder.AddChild<DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions>();
-            builder.AddChild<DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails>();
-            builder.Particle = new CompositeParticle.Builder(ParticleType.Sequence, 1, 1)
-            {
-                new ElementParticle(typeof(DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails), 0, 1, version: FileFormatVersions.Microsoft365),
-                new ElementParticle(typeof(DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions), 0, 1, version: FileFormatVersions.Microsoft365)
-            };
-        }
-
-        /// <summary>
-        /// <para>TaskDetails.</para>
-        /// <para>Represents the following element tag in the schema: p228:taskDetails.</para>
-        /// </summary>
-        /// <remark>
-        /// xmlns:p228 = http://schemas.microsoft.com/office/powerpoint/2022/08/main
-        /// </remark>
-        public DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails? TaskDetails
-        {
-            get => GetElement<DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails>();
-            set => SetElement(value);
-        }
-
-        /// <summary>
-        /// <para>Reactions.</para>
-        /// <para>Represents the following element tag in the schema: p223:reactions.</para>
-        /// </summary>
-        /// <remark>
-        /// xmlns:p223 = http://schemas.microsoft.com/office/powerpoint/2022/03/main
-        /// </remark>
-        public DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions? Reactions
-        {
-            get => GetElement<DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions>();
-            set => SetElement(value);
-        }
-
-        /// <inheritdoc/>
-        public override OpenXmlElement CloneNode(bool deep) => CloneImp<CommentPropertiesExtension>(deep);
-    }
-
     /// <summary>
     /// Defines the CommentStatus enumeration.
     /// </summary>
diff --git a/generated/DocumentFormat.OpenXml/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/schemas_openxmlformats_org_presentationml_2006_main.g.cs b/generated/DocumentFormat.OpenXml/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/schemas_openxmlformats_org_presentationml_2006_main.g.cs
index 3f6136419..55887ae8b 100644
--- a/generated/DocumentFormat.OpenXml/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/schemas_openxmlformats_org_presentationml_2006_main.g.cs
+++ b/generated/DocumentFormat.OpenXml/DocumentFormat.OpenXml.Generator/DocumentFormat.OpenXml.Generator.OpenXmlGenerator/schemas_openxmlformats_org_presentationml_2006_main.g.cs
@@ -9,6 +9,8 @@
 using DocumentFormat.OpenXml.Drawing;
 using DocumentFormat.OpenXml.Framework;
 using DocumentFormat.OpenXml.Framework.Metadata;
+using DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main;
+using DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main;
 using DocumentFormat.OpenXml.Office.PowerPoint.Y2023.M02.Main;
 using DocumentFormat.OpenXml.Office2010.Drawing;
 using DocumentFormat.OpenXml.Office2010.PowerPoint;
@@ -1278,6 +1280,95 @@ public DocumentFormat.OpenXml.Drawing.PresetColor? PresetColor
         public override OpenXmlElement CloneNode(bool deep) => CloneImp<BackgroundStyleReference>(deep);
     }
 
+    /// <summary>
+    /// <para>Data for the Windows platform..</para>
+    /// <para>This class is available in Office 2021 and above.</para>
+    /// <para>When the object is serialized out as xml, it's qualified name is p:ext.</para>
+    /// </summary>
+    /// <remark>
+    /// <para>The following table lists the possible child types:</para>
+    /// <list type="bullet">
+    ///   <item><description><see cref="DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions" /> <c>&lt;p223:reactions></c></description></item>
+    ///   <item><description><see cref="DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails" /> <c>&lt;p228:taskDetails></c></description></item>
+    /// </list>
+    /// </remark>
+    public partial class CommentPropertiesExtension : OpenXmlCompositeElement
+    {
+        /// <summary>
+        /// Initializes a new instance of the CommentPropertiesExtension class.
+        /// </summary>
+        public CommentPropertiesExtension() : base()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CommentPropertiesExtension class with the specified child elements.
+        /// </summary>
+        /// <param name="childElements">Specifies the child elements.</param>
+        public CommentPropertiesExtension(IEnumerable<OpenXmlElement> childElements) : base(childElements)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CommentPropertiesExtension class with the specified child elements.
+        /// </summary>
+        /// <param name="childElements">Specifies the child elements.</param>
+        public CommentPropertiesExtension(params OpenXmlElement[] childElements) : base(childElements)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CommentPropertiesExtension class from outer XML.
+        /// </summary>
+        /// <param name="outerXml">Specifies the outer XML of the element.</param>
+        public CommentPropertiesExtension(string outerXml) : base(outerXml)
+        {
+        }
+
+        internal override void ConfigureMetadata(ElementMetadata.Builder builder)
+        {
+            base.ConfigureMetadata(builder);
+            builder.SetSchema("p:ext");
+            builder.Availability = FileFormatVersions.Office2021;
+            builder.AddChild<DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions>();
+            builder.AddChild<DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails>();
+            builder.Particle = new CompositeParticle.Builder(ParticleType.Sequence, 1, 1)
+            {
+                new ElementParticle(typeof(DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails), 0, 1, version: FileFormatVersions.Microsoft365),
+                new ElementParticle(typeof(DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions), 0, 1, version: FileFormatVersions.Microsoft365)
+            };
+        }
+
+        /// <summary>
+        /// <para>TaskDetails, this property is only available in Microsoft365 and later..</para>
+        /// <para>Represents the following element tag in the schema: p228:taskDetails.</para>
+        /// </summary>
+        /// <remark>
+        /// xmlns:p228 = http://schemas.microsoft.com/office/powerpoint/2022/08/main
+        /// </remark>
+        public DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails? TaskDetails
+        {
+            get => GetElement<DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails>();
+            set => SetElement(value);
+        }
+
+        /// <summary>
+        /// <para>Reactions, this property is only available in Microsoft365 and later..</para>
+        /// <para>Represents the following element tag in the schema: p223:reactions.</para>
+        /// </summary>
+        /// <remark>
+        /// xmlns:p223 = http://schemas.microsoft.com/office/powerpoint/2022/03/main
+        /// </remark>
+        public DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions? Reactions
+        {
+            get => GetElement<DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions>();
+            set => SetElement(value);
+        }
+
+        /// <inheritdoc/>
+        public override OpenXmlElement CloneNode(bool deep) => CloneImp<CommentPropertiesExtension>(deep);
+    }
+
     /// <summary>
     /// <para>List of Comment Authors.</para>
     /// <para>This class is available in Office 2007 and above.</para>
diff --git a/src/DocumentFormat.OpenXml.Linq/Presentation/P188.cs b/src/DocumentFormat.OpenXml.Linq/Presentation/P188.cs
new file mode 100644
index 000000000..aeb264a6c
--- /dev/null
+++ b/src/DocumentFormat.OpenXml.Linq/Presentation/P188.cs
@@ -0,0 +1,30 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Xml.Linq;
+
+namespace DocumentFormat.OpenXml.Linq
+{
+    public static partial class P188
+    {
+        /// <summary>
+        /// Represents the p188:ext XML element.
+        /// </summary>
+        /// <remarks>
+        /// <para>As an XML element, it:</para>
+        /// <list type="bullet">
+        /// <item><description>has the following parent XML elements: <see cref="extLst" />.</description></item>
+        /// <item><description>has the following child XML elements: <see cref="P223.reactions" />, <see cref="P228.taskDetails" />.</description></item>
+        /// <item><description>corresponds to the following strongly-typed classes: CommentPropertiesExtension.</description></item>
+        /// </list>
+        /// </remarks>
+        [Obsolete("Unused property, prefer DocumentFormat.OpenXml.Linq.P.ext", true)]
+        [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+#pragma warning disable SA1307 // Accessible fields should begin with upper-case letter
+#pragma warning disable SA1311 // Static readonly fields should begin with upper-case letter
+        public static readonly XName ext = p188 + "ext";
+#pragma warning restore SA1311 // Static readonly fields should begin with upper-case letter
+#pragma warning restore SA1307 // Accessible fields should begin with upper-case letter
+    }
+}
diff --git a/src/DocumentFormat.OpenXml/Schema/Presentation/CommentPropertiesExtension.cs b/src/DocumentFormat.OpenXml/Schema/Presentation/CommentPropertiesExtension.cs
new file mode 100644
index 000000000..169a6fdeb
--- /dev/null
+++ b/src/DocumentFormat.OpenXml/Schema/Presentation/CommentPropertiesExtension.cs
@@ -0,0 +1,63 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Collections.Generic;
+
+namespace DocumentFormat.OpenXml.Office2021.PowerPoint.Comment
+{
+    /// <summary>
+    /// <para>Data for the Windows platform..</para>
+    /// <para>This class is available in Office 2021 and above.</para>
+    /// <para>When the object is serialized out as xml, it's qualified name is p:ext.</para>
+    /// </summary>
+    /// <remark>
+    /// <para>The following table lists the possible child types:</para>
+    /// <list type="bullet">
+    ///   <item><description><see cref="DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions" /> <c>&lt;p223:reactions></c></description></item>
+    ///   <item><description><see cref="DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails" /> <c>&lt;p228:taskDetails></c></description></item>
+    /// </list>
+    /// </remark>
+    [Obsolete("Unused type, prefer DocumentFormat.OpenXml.Presentation.CommentPropertiesExtension", true)]
+    [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
+    public partial class CommentPropertiesExtension : DocumentFormat.OpenXml.Presentation.CommentPropertiesExtension
+    {
+        /// <summary>
+        /// Initializes a new instance of the CommentPropertiesExtension class.
+        /// </summary>
+        public CommentPropertiesExtension()
+            : base()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CommentPropertiesExtension class with the specified child elements.
+        /// </summary>
+        /// <param name="childElements">Specifies the child elements.</param>
+        public CommentPropertiesExtension(IEnumerable<OpenXmlElement> childElements)
+            : base(childElements)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CommentPropertiesExtension class with the specified child elements.
+        /// </summary>
+        /// <param name="childElements">Specifies the child elements.</param>
+        public CommentPropertiesExtension(params OpenXmlElement[] childElements)
+            : base(childElements)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CommentPropertiesExtension class from outer XML.
+        /// </summary>
+        /// <param name="outerXml">Specifies the outer XML of the element.</param>
+        public CommentPropertiesExtension(string outerXml)
+            : base(outerXml)
+        {
+        }
+
+        /// <inheritdoc/>
+        public override OpenXmlElement CloneNode(bool deep) => CloneImp<CommentPropertiesExtension>(deep);
+    }
+}
diff --git a/test/DocumentFormat.OpenXml.Framework.Tests/ElementChildren.json b/test/DocumentFormat.OpenXml.Framework.Tests/ElementChildren.json
index 6d4441c61..e526a673f 100644
--- a/test/DocumentFormat.OpenXml.Framework.Tests/ElementChildren.json
+++ b/test/DocumentFormat.OpenXml.Framework.Tests/ElementChildren.json
@@ -38191,7 +38191,7 @@
     "Children": [
       {
         "Name": "ext",
-        "Namespace": "http://schemas.microsoft.com/office/powerpoint/2018/8/main"
+        "Namespace": "http://schemas.openxmlformats.org/presentationml/2006/main"
       }
     ]
   },
@@ -39169,6 +39169,19 @@
       }
     ]
   },
+  {
+    "Element": "DocumentFormat.OpenXml.Presentation.CommentPropertiesExtension",
+    "Children": [
+      {
+        "Name": "reactions",
+        "Namespace": "http://schemas.microsoft.com/office/powerpoint/2022/03/main"
+      },
+      {
+        "Name": "taskDetails",
+        "Namespace": "http://schemas.microsoft.com/office/powerpoint/2022/08/main"
+      }
+    ]
+  },
   {
     "Element": "DocumentFormat.OpenXml.Presentation.CommonBehavior",
     "Children": [
diff --git a/test/DocumentFormat.OpenXml.Packaging.Tests/data/Particles.json b/test/DocumentFormat.OpenXml.Packaging.Tests/data/Particles.json
index 856666c5e..a1fd4752c 100644
--- a/test/DocumentFormat.OpenXml.Packaging.Tests/data/Particles.json
+++ b/test/DocumentFormat.OpenXml.Packaging.Tests/data/Particles.json
@@ -54576,6 +54576,12 @@
  {
   "Key": "DocumentFormat.OpenXml.Office2021.PowerPoint.Comment.CommentPropertiesExtension",
   "Value": [
+   {
+    "Key": "Office2021",
+    "Value": {
+     "ParticleType": "Sequence"
+    }
+   },
    {
     "Key": "Microsoft365",
     "Value": {
@@ -54598,19 +54604,24 @@
   "Key": "DocumentFormat.OpenXml.Office2021.PowerPoint.Comment.CommentPropertiesExtensionList",
   "Value": [
    {
-    "Key": "Office2021",
-    "Value": {
-     "ParticleType": "Sequence"
-    }
-   },
-   {
-    "Key": "Microsoft365",
+    "Key": "Office2021, Microsoft365",
     "Value": {
      "ChildrenParticles": [
       {
-       "ElementType": "DocumentFormat.OpenXml.Office2021.PowerPoint.Comment.CommentPropertiesExtension",
-       "MaxOccurs": 0,
-       "MinOccurs": 0
+       "ChildrenParticles": [
+        {
+         "ChildrenParticles": [
+          {
+           "ElementType": "DocumentFormat.OpenXml.Presentation.CommentPropertiesExtension",
+           "MaxOccurs": 0,
+           "MinOccurs": 0
+          }
+         ],
+         "ParticleType": "Sequence"
+        }
+       ],
+       "MinOccurs": 0,
+       "ParticleType": "Group"
       }
      ],
      "ParticleType": "Sequence"
@@ -56024,6 +56035,33 @@
    }
   ]
  },
+ {
+  "Key": "DocumentFormat.OpenXml.Presentation.CommentPropertiesExtension",
+  "Value": [
+   {
+    "Key": "Office2021",
+    "Value": {
+     "ParticleType": "Sequence"
+    }
+   },
+   {
+    "Key": "Microsoft365",
+    "Value": {
+     "ChildrenParticles": [
+      {
+       "ElementType": "DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M08.Main.TaskDetails",
+       "MinOccurs": 0
+      },
+      {
+       "ElementType": "DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main.Reactions",
+       "MinOccurs": 0
+      }
+     ],
+     "ParticleType": "Sequence"
+    }
+   }
+  ]
+ },
  {
   "Key": "DocumentFormat.OpenXml.Presentation.CommonBehavior",
   "Value": [