diff --git a/clients/client-personalize/README.md b/clients/client-personalize/README.md
index d4d7f99e18d4..d583f01d8f20 100644
--- a/clients/client-personalize/README.md
+++ b/clients/client-personalize/README.md
@@ -715,6 +715,14 @@ UpdateCampaign
 
 [Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-personalize/classes/updatecampaigncommand.html) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-personalize/interfaces/updatecampaigncommandinput.html) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-personalize/interfaces/updatecampaigncommandoutput.html)
 
+</details>
+<details>
+<summary>
+UpdateDataset
+</summary>
+
+[Command API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-personalize/classes/updatedatasetcommand.html) / [Input](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-personalize/interfaces/updatedatasetcommandinput.html) / [Output](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-personalize/interfaces/updatedatasetcommandoutput.html)
+
 </details>
 <details>
 <summary>
diff --git a/clients/client-personalize/src/Personalize.ts b/clients/client-personalize/src/Personalize.ts
index ae6c13d7e0f4..2021a7efd596 100644
--- a/clients/client-personalize/src/Personalize.ts
+++ b/clients/client-personalize/src/Personalize.ts
@@ -306,6 +306,11 @@ import {
   UpdateCampaignCommandInput,
   UpdateCampaignCommandOutput,
 } from "./commands/UpdateCampaignCommand";
+import {
+  UpdateDatasetCommand,
+  UpdateDatasetCommandInput,
+  UpdateDatasetCommandOutput,
+} from "./commands/UpdateDatasetCommand";
 import {
   UpdateMetricAttributionCommand,
   UpdateMetricAttributionCommandInput,
@@ -383,6 +388,7 @@ const commands = {
   TagResourceCommand,
   UntagResourceCommand,
   UpdateCampaignCommand,
+  UpdateDatasetCommand,
   UpdateMetricAttributionCommand,
   UpdateRecommenderCommand,
 };
@@ -1362,6 +1368,17 @@ export interface Personalize {
     cb: (err: any, data?: UpdateCampaignCommandOutput) => void
   ): void;
 
+  /**
+   * @see {@link UpdateDatasetCommand}
+   */
+  updateDataset(args: UpdateDatasetCommandInput, options?: __HttpHandlerOptions): Promise<UpdateDatasetCommandOutput>;
+  updateDataset(args: UpdateDatasetCommandInput, cb: (err: any, data?: UpdateDatasetCommandOutput) => void): void;
+  updateDataset(
+    args: UpdateDatasetCommandInput,
+    options: __HttpHandlerOptions,
+    cb: (err: any, data?: UpdateDatasetCommandOutput) => void
+  ): void;
+
   /**
    * @see {@link UpdateMetricAttributionCommand}
    */
diff --git a/clients/client-personalize/src/PersonalizeClient.ts b/clients/client-personalize/src/PersonalizeClient.ts
index cec2f9c68592..ec7c1a31cba8 100644
--- a/clients/client-personalize/src/PersonalizeClient.ts
+++ b/clients/client-personalize/src/PersonalizeClient.ts
@@ -191,6 +191,7 @@ import {
 import { TagResourceCommandInput, TagResourceCommandOutput } from "./commands/TagResourceCommand";
 import { UntagResourceCommandInput, UntagResourceCommandOutput } from "./commands/UntagResourceCommand";
 import { UpdateCampaignCommandInput, UpdateCampaignCommandOutput } from "./commands/UpdateCampaignCommand";
+import { UpdateDatasetCommandInput, UpdateDatasetCommandOutput } from "./commands/UpdateDatasetCommand";
 import {
   UpdateMetricAttributionCommandInput,
   UpdateMetricAttributionCommandOutput,
@@ -274,6 +275,7 @@ export type ServiceInputTypes =
   | TagResourceCommandInput
   | UntagResourceCommandInput
   | UpdateCampaignCommandInput
+  | UpdateDatasetCommandInput
   | UpdateMetricAttributionCommandInput
   | UpdateRecommenderCommandInput;
 
@@ -345,6 +347,7 @@ export type ServiceOutputTypes =
   | TagResourceCommandOutput
   | UntagResourceCommandOutput
   | UpdateCampaignCommandOutput
+  | UpdateDatasetCommandOutput
   | UpdateMetricAttributionCommandOutput
   | UpdateRecommenderCommandOutput;
 
diff --git a/clients/client-personalize/src/commands/DescribeDatasetCommand.ts b/clients/client-personalize/src/commands/DescribeDatasetCommand.ts
index e5c71ad529ae..4a96ff0add33 100644
--- a/clients/client-personalize/src/commands/DescribeDatasetCommand.ts
+++ b/clients/client-personalize/src/commands/DescribeDatasetCommand.ts
@@ -59,6 +59,13 @@ export interface DescribeDatasetCommandOutput extends DescribeDatasetResponse, _
  * //     status: "STRING_VALUE",
  * //     creationDateTime: new Date("TIMESTAMP"),
  * //     lastUpdatedDateTime: new Date("TIMESTAMP"),
+ * //     latestDatasetUpdate: { // DatasetUpdateSummary
+ * //       schemaArn: "STRING_VALUE",
+ * //       status: "STRING_VALUE",
+ * //       failureReason: "STRING_VALUE",
+ * //       creationDateTime: new Date("TIMESTAMP"),
+ * //       lastUpdatedDateTime: new Date("TIMESTAMP"),
+ * //     },
  * //   },
  * // };
  *
diff --git a/clients/client-personalize/src/commands/UpdateDatasetCommand.ts b/clients/client-personalize/src/commands/UpdateDatasetCommand.ts
new file mode 100644
index 000000000000..6bbcc6454af2
--- /dev/null
+++ b/clients/client-personalize/src/commands/UpdateDatasetCommand.ts
@@ -0,0 +1,150 @@
+// smithy-typescript generated code
+import { EndpointParameterInstructions, getEndpointPlugin } from "@smithy/middleware-endpoint";
+import { getSerdePlugin } from "@smithy/middleware-serde";
+import { HttpRequest as __HttpRequest, HttpResponse as __HttpResponse } from "@smithy/protocol-http";
+import { Command as $Command } from "@smithy/smithy-client";
+import {
+  FinalizeHandlerArguments,
+  Handler,
+  HandlerExecutionContext,
+  HttpHandlerOptions as __HttpHandlerOptions,
+  MetadataBearer as __MetadataBearer,
+  MiddlewareStack,
+  SerdeContext as __SerdeContext,
+} from "@smithy/types";
+
+import { UpdateDatasetRequest, UpdateDatasetResponse } from "../models/models_0";
+import { PersonalizeClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes } from "../PersonalizeClient";
+import { de_UpdateDatasetCommand, se_UpdateDatasetCommand } from "../protocols/Aws_json1_1";
+
+/**
+ * @public
+ */
+export { __MetadataBearer, $Command };
+/**
+ * @public
+ *
+ * The input for {@link UpdateDatasetCommand}.
+ */
+export interface UpdateDatasetCommandInput extends UpdateDatasetRequest {}
+/**
+ * @public
+ *
+ * The output of {@link UpdateDatasetCommand}.
+ */
+export interface UpdateDatasetCommandOutput extends UpdateDatasetResponse, __MetadataBearer {}
+
+/**
+ * @public
+ * <p>Update a dataset to replace its schema with a new or existing one. For more information, see <a href="https://docs.aws.amazon.com/personalize/latest/dg/updating-dataset-schema.html">Replacing a dataset's schema</a>. </p>
+ * @example
+ * Use a bare-bones client and the command you need to make an API call.
+ * ```javascript
+ * import { PersonalizeClient, UpdateDatasetCommand } from "@aws-sdk/client-personalize"; // ES Modules import
+ * // const { PersonalizeClient, UpdateDatasetCommand } = require("@aws-sdk/client-personalize"); // CommonJS import
+ * const client = new PersonalizeClient(config);
+ * const input = { // UpdateDatasetRequest
+ *   datasetArn: "STRING_VALUE", // required
+ *   schemaArn: "STRING_VALUE", // required
+ * };
+ * const command = new UpdateDatasetCommand(input);
+ * const response = await client.send(command);
+ * // { // UpdateDatasetResponse
+ * //   datasetArn: "STRING_VALUE",
+ * // };
+ *
+ * ```
+ *
+ * @param UpdateDatasetCommandInput - {@link UpdateDatasetCommandInput}
+ * @returns {@link UpdateDatasetCommandOutput}
+ * @see {@link UpdateDatasetCommandInput} for command's `input` shape.
+ * @see {@link UpdateDatasetCommandOutput} for command's `response` shape.
+ * @see {@link PersonalizeClientResolvedConfig | config} for PersonalizeClient's `config` shape.
+ *
+ * @throws {@link InvalidInputException} (client fault)
+ *  <p>Provide a valid value for the field or parameter.</p>
+ *
+ * @throws {@link ResourceInUseException} (client fault)
+ *  <p>The specified resource is in use.</p>
+ *
+ * @throws {@link ResourceNotFoundException} (client fault)
+ *  <p>Could not find the specified resource.</p>
+ *
+ * @throws {@link PersonalizeServiceException}
+ * <p>Base exception class for all service exceptions from Personalize service.</p>
+ *
+ */
+export class UpdateDatasetCommand extends $Command<
+  UpdateDatasetCommandInput,
+  UpdateDatasetCommandOutput,
+  PersonalizeClientResolvedConfig
+> {
+  // Start section: command_properties
+  // End section: command_properties
+
+  public static getEndpointParameterInstructions(): EndpointParameterInstructions {
+    return {
+      UseFIPS: { type: "builtInParams", name: "useFipsEndpoint" },
+      Endpoint: { type: "builtInParams", name: "endpoint" },
+      Region: { type: "builtInParams", name: "region" },
+      UseDualStack: { type: "builtInParams", name: "useDualstackEndpoint" },
+    };
+  }
+
+  /**
+   * @public
+   */
+  constructor(readonly input: UpdateDatasetCommandInput) {
+    // Start section: command_constructor
+    super();
+    // End section: command_constructor
+  }
+
+  /**
+   * @internal
+   */
+  resolveMiddleware(
+    clientStack: MiddlewareStack<ServiceInputTypes, ServiceOutputTypes>,
+    configuration: PersonalizeClientResolvedConfig,
+    options?: __HttpHandlerOptions
+  ): Handler<UpdateDatasetCommandInput, UpdateDatasetCommandOutput> {
+    this.middlewareStack.use(getSerdePlugin(configuration, this.serialize, this.deserialize));
+    this.middlewareStack.use(getEndpointPlugin(configuration, UpdateDatasetCommand.getEndpointParameterInstructions()));
+
+    const stack = clientStack.concat(this.middlewareStack);
+
+    const { logger } = configuration;
+    const clientName = "PersonalizeClient";
+    const commandName = "UpdateDatasetCommand";
+    const handlerExecutionContext: HandlerExecutionContext = {
+      logger,
+      clientName,
+      commandName,
+      inputFilterSensitiveLog: (_: any) => _,
+      outputFilterSensitiveLog: (_: any) => _,
+    };
+    const { requestHandler } = configuration;
+    return stack.resolve(
+      (request: FinalizeHandlerArguments<any>) =>
+        requestHandler.handle(request.request as __HttpRequest, options || {}),
+      handlerExecutionContext
+    );
+  }
+
+  /**
+   * @internal
+   */
+  private serialize(input: UpdateDatasetCommandInput, context: __SerdeContext): Promise<__HttpRequest> {
+    return se_UpdateDatasetCommand(input, context);
+  }
+
+  /**
+   * @internal
+   */
+  private deserialize(output: __HttpResponse, context: __SerdeContext): Promise<UpdateDatasetCommandOutput> {
+    return de_UpdateDatasetCommand(output, context);
+  }
+
+  // Start section: command_body_extra
+  // End section: command_body_extra
+}
diff --git a/clients/client-personalize/src/commands/index.ts b/clients/client-personalize/src/commands/index.ts
index 3e95fecdbbd0..c2e3721815e9 100644
--- a/clients/client-personalize/src/commands/index.ts
+++ b/clients/client-personalize/src/commands/index.ts
@@ -63,5 +63,6 @@ export * from "./StopSolutionVersionCreationCommand";
 export * from "./TagResourceCommand";
 export * from "./UntagResourceCommand";
 export * from "./UpdateCampaignCommand";
+export * from "./UpdateDatasetCommand";
 export * from "./UpdateMetricAttributionCommand";
 export * from "./UpdateRecommenderCommand";
diff --git a/clients/client-personalize/src/models/models_0.ts b/clients/client-personalize/src/models/models_0.ts
index 9f54ec0e6e4b..52536d97e731 100644
--- a/clients/client-personalize/src/models/models_0.ts
+++ b/clients/client-personalize/src/models/models_0.ts
@@ -1416,7 +1416,7 @@ export interface CreateSolutionRequest {
   performAutoML?: boolean;
 
   /**
-   * <p>The ARN of the recipe to use for model training. Only specified when
+   * <p>The ARN of the recipe to use for model training. This is required when
    *       <code>performAutoML</code> is false.</p>
    */
   recipeArn?: string;
@@ -1993,6 +1993,37 @@ export interface DescribeDatasetRequest {
   datasetArn: string | undefined;
 }
 
+/**
+ * @public
+ * <p>Describes an update to a dataset.</p>
+ */
+export interface DatasetUpdateSummary {
+  /**
+   * <p>The Amazon Resource Name (ARN) of the schema that replaced the previous schema of the dataset.</p>
+   */
+  schemaArn?: string;
+
+  /**
+   * <p>The status of the dataset update. </p>
+   */
+  status?: string;
+
+  /**
+   * <p>If updating a dataset fails, provides the reason why.</p>
+   */
+  failureReason?: string;
+
+  /**
+   * <p>The creation date and time (in Unix time) of the dataset update.</p>
+   */
+  creationDateTime?: Date;
+
+  /**
+   * <p>The last update date and time (in Unix time) of the dataset.</p>
+   */
+  lastUpdatedDateTime?: Date;
+}
+
 /**
  * @public
  * <p>Provides metadata for a dataset.</p>
@@ -2059,6 +2090,11 @@ export interface Dataset {
    * <p>A time stamp that shows when the dataset was updated.</p>
    */
   lastUpdatedDateTime?: Date;
+
+  /**
+   * <p>Describes the latest update to the dataset.</p>
+   */
+  latestDatasetUpdate?: DatasetUpdateSummary;
 }
 
 /**
@@ -3052,7 +3088,8 @@ export interface Solution {
   performAutoML?: boolean;
 
   /**
-   * <p>The ARN of the recipe used to create the solution.</p>
+   * <p>The ARN of the recipe used to create the solution. This is required when
+   *       <code>performAutoML</code> is false.</p>
    */
   recipeArn?: string;
 
@@ -4750,6 +4787,31 @@ export interface UpdateCampaignResponse {
   campaignArn?: string;
 }
 
+/**
+ * @public
+ */
+export interface UpdateDatasetRequest {
+  /**
+   * <p>The Amazon Resource Name (ARN) of the dataset that you want to update.</p>
+   */
+  datasetArn: string | undefined;
+
+  /**
+   * <p>The Amazon Resource Name (ARN) of the new schema you want use.</p>
+   */
+  schemaArn: string | undefined;
+}
+
+/**
+ * @public
+ */
+export interface UpdateDatasetResponse {
+  /**
+   * <p>The Amazon Resource Name (ARN) of the dataset you updated.</p>
+   */
+  datasetArn?: string;
+}
+
 /**
  * @public
  */
diff --git a/clients/client-personalize/src/protocols/Aws_json1_1.ts b/clients/client-personalize/src/protocols/Aws_json1_1.ts
index e276a658b038..bab3178ed62a 100644
--- a/clients/client-personalize/src/protocols/Aws_json1_1.ts
+++ b/clients/client-personalize/src/protocols/Aws_json1_1.ts
@@ -164,6 +164,7 @@ import {
 import { TagResourceCommandInput, TagResourceCommandOutput } from "../commands/TagResourceCommand";
 import { UntagResourceCommandInput, UntagResourceCommandOutput } from "../commands/UntagResourceCommand";
 import { UpdateCampaignCommandInput, UpdateCampaignCommandOutput } from "../commands/UpdateCampaignCommand";
+import { UpdateDatasetCommandInput, UpdateDatasetCommandOutput } from "../commands/UpdateDatasetCommand";
 import {
   UpdateMetricAttributionCommandInput,
   UpdateMetricAttributionCommandOutput,
@@ -212,6 +213,7 @@ import {
   DatasetSchema,
   DatasetSchemaSummary,
   DatasetSummary,
+  DatasetUpdateSummary,
   DataSource,
   DefaultContinuousHyperParameterRange,
   DefaultHyperParameterRanges,
@@ -335,6 +337,7 @@ import {
   TrainingDataConfig,
   UntagResourceRequest,
   UpdateCampaignRequest,
+  UpdateDatasetRequest,
   UpdateMetricAttributionRequest,
   UpdateRecommenderRequest,
 } from "../models/models_0";
@@ -1172,6 +1175,19 @@ export const se_UpdateCampaignCommand = async (
   return buildHttpRpcRequest(context, headers, "/", undefined, body);
 };
 
+/**
+ * serializeAws_json1_1UpdateDatasetCommand
+ */
+export const se_UpdateDatasetCommand = async (
+  input: UpdateDatasetCommandInput,
+  context: __SerdeContext
+): Promise<__HttpRequest> => {
+  const headers: __HeaderBag = sharedHeaders("UpdateDataset");
+  let body: any;
+  body = JSON.stringify(_json(input));
+  return buildHttpRpcRequest(context, headers, "/", undefined, body);
+};
+
 /**
  * serializeAws_json1_1UpdateMetricAttributionCommand
  */
@@ -4508,6 +4524,58 @@ const de_UpdateCampaignCommandError = async (
   }
 };
 
+/**
+ * deserializeAws_json1_1UpdateDatasetCommand
+ */
+export const de_UpdateDatasetCommand = async (
+  output: __HttpResponse,
+  context: __SerdeContext
+): Promise<UpdateDatasetCommandOutput> => {
+  if (output.statusCode >= 300) {
+    return de_UpdateDatasetCommandError(output, context);
+  }
+  const data: any = await parseBody(output.body, context);
+  let contents: any = {};
+  contents = _json(data);
+  const response: UpdateDatasetCommandOutput = {
+    $metadata: deserializeMetadata(output),
+    ...contents,
+  };
+  return response;
+};
+
+/**
+ * deserializeAws_json1_1UpdateDatasetCommandError
+ */
+const de_UpdateDatasetCommandError = async (
+  output: __HttpResponse,
+  context: __SerdeContext
+): Promise<UpdateDatasetCommandOutput> => {
+  const parsedOutput: any = {
+    ...output,
+    body: await parseErrorBody(output.body, context),
+  };
+  const errorCode = loadRestJsonErrorCode(output, parsedOutput.body);
+  switch (errorCode) {
+    case "InvalidInputException":
+    case "com.amazonaws.personalize#InvalidInputException":
+      throw await de_InvalidInputExceptionRes(parsedOutput, context);
+    case "ResourceInUseException":
+    case "com.amazonaws.personalize#ResourceInUseException":
+      throw await de_ResourceInUseExceptionRes(parsedOutput, context);
+    case "ResourceNotFoundException":
+    case "com.amazonaws.personalize#ResourceNotFoundException":
+      throw await de_ResourceNotFoundExceptionRes(parsedOutput, context);
+    default:
+      const parsedBody = parsedOutput.body;
+      return throwDefaultError({
+        output,
+        parsedBody,
+        errorCode,
+      });
+  }
+};
+
 /**
  * deserializeAws_json1_1UpdateMetricAttributionCommand
  */
@@ -5008,6 +5076,8 @@ const se_SolutionConfig = (input: SolutionConfig, context: __SerdeContext): any
 
 // se_UpdateCampaignRequest omitted.
 
+// se_UpdateDatasetRequest omitted.
+
 // se_UpdateMetricAttributionRequest omitted.
 
 // se_UpdateRecommenderRequest omitted.
@@ -5273,6 +5343,7 @@ const de_Dataset = (output: any, context: __SerdeContext): Dataset => {
     datasetGroupArn: __expectString,
     datasetType: __expectString,
     lastUpdatedDateTime: (_: any) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
+    latestDatasetUpdate: (_: any) => de_DatasetUpdateSummary(_, context),
     name: __expectString,
     schemaArn: __expectString,
     status: __expectString,
@@ -5468,6 +5539,19 @@ const de_DatasetSummary = (output: any, context: __SerdeContext): DatasetSummary
   }) as any;
 };
 
+/**
+ * deserializeAws_json1_1DatasetUpdateSummary
+ */
+const de_DatasetUpdateSummary = (output: any, context: __SerdeContext): DatasetUpdateSummary => {
+  return take(output, {
+    creationDateTime: (_: any) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
+    failureReason: __expectString,
+    lastUpdatedDateTime: (_: any) => __expectNonNull(__parseEpochTimestamp(__expectNumber(_))),
+    schemaArn: __expectString,
+    status: __expectString,
+  }) as any;
+};
+
 // de_DataSource omitted.
 
 // de_DefaultCategoricalHyperParameterRange omitted.
@@ -6316,6 +6400,8 @@ const de_SolutionVersionSummary = (output: any, context: __SerdeContext): Soluti
 
 // de_UpdateCampaignResponse omitted.
 
+// de_UpdateDatasetResponse omitted.
+
 // de_UpdateMetricAttributionResponse omitted.
 
 // de_UpdateRecommenderResponse omitted.
diff --git a/codegen/sdk-codegen/aws-models/personalize.json b/codegen/sdk-codegen/aws-models/personalize.json
index 103a4f3fca60..003175369559 100644
--- a/codegen/sdk-codegen/aws-models/personalize.json
+++ b/codegen/sdk-codegen/aws-models/personalize.json
@@ -323,6 +323,9 @@
         {
           "target": "com.amazonaws.personalize#UpdateCampaign"
         },
+        {
+          "target": "com.amazonaws.personalize#UpdateDataset"
+        },
         {
           "target": "com.amazonaws.personalize#UpdateMetricAttribution"
         },
@@ -3010,7 +3013,7 @@
         "recipeArn": {
           "target": "com.amazonaws.personalize#Arn",
           "traits": {
-            "smithy.api#documentation": "<p>The ARN of the recipe to use for model training. Only specified when\n      <code>performAutoML</code> is false.</p>"
+            "smithy.api#documentation": "<p>The ARN of the recipe to use for model training. This is required when\n      <code>performAutoML</code> is false.</p>"
           }
         },
         "datasetGroupArn": {
@@ -3200,6 +3203,12 @@
           "traits": {
             "smithy.api#documentation": "<p>A time stamp that shows when the dataset was updated.</p>"
           }
+        },
+        "latestDatasetUpdate": {
+          "target": "com.amazonaws.personalize#DatasetUpdateSummary",
+          "traits": {
+            "smithy.api#documentation": "<p>Describes the latest update to the dataset.</p>"
+          }
         }
       },
       "traits": {
@@ -3739,6 +3748,44 @@
         }
       }
     },
+    "com.amazonaws.personalize#DatasetUpdateSummary": {
+      "type": "structure",
+      "members": {
+        "schemaArn": {
+          "target": "com.amazonaws.personalize#Arn",
+          "traits": {
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the schema that replaced the previous schema of the dataset.</p>"
+          }
+        },
+        "status": {
+          "target": "com.amazonaws.personalize#Status",
+          "traits": {
+            "smithy.api#documentation": "<p>The status of the dataset update. </p>"
+          }
+        },
+        "failureReason": {
+          "target": "com.amazonaws.personalize#FailureReason",
+          "traits": {
+            "smithy.api#documentation": "<p>If updating a dataset fails, provides the reason why.</p>"
+          }
+        },
+        "creationDateTime": {
+          "target": "com.amazonaws.personalize#Date",
+          "traits": {
+            "smithy.api#documentation": "<p>The creation date and time (in Unix time) of the dataset update.</p>"
+          }
+        },
+        "lastUpdatedDateTime": {
+          "target": "com.amazonaws.personalize#Date",
+          "traits": {
+            "smithy.api#documentation": "<p>The last update date and time (in Unix time) of the dataset.</p>"
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#documentation": "<p>Describes an update to a dataset.</p>"
+      }
+    },
     "com.amazonaws.personalize#Datasets": {
       "type": "list",
       "member": {
@@ -7868,7 +7915,7 @@
         "recipeArn": {
           "target": "com.amazonaws.personalize#Arn",
           "traits": {
-            "smithy.api#documentation": "<p>The ARN of the recipe used to create the solution.</p>"
+            "smithy.api#documentation": "<p>The ARN of the recipe used to create the solution. This is required when\n      <code>performAutoML</code> is false.</p>"
           }
         },
         "datasetGroupArn": {
@@ -8701,6 +8748,66 @@
         "smithy.api#output": {}
       }
     },
+    "com.amazonaws.personalize#UpdateDataset": {
+      "type": "operation",
+      "input": {
+        "target": "com.amazonaws.personalize#UpdateDatasetRequest"
+      },
+      "output": {
+        "target": "com.amazonaws.personalize#UpdateDatasetResponse"
+      },
+      "errors": [
+        {
+          "target": "com.amazonaws.personalize#InvalidInputException"
+        },
+        {
+          "target": "com.amazonaws.personalize#ResourceInUseException"
+        },
+        {
+          "target": "com.amazonaws.personalize#ResourceNotFoundException"
+        }
+      ],
+      "traits": {
+        "smithy.api#documentation": "<p>Update a dataset to replace its schema with a new or existing one. For more information, see <a href=\"https://docs.aws.amazon.com/personalize/latest/dg/updating-dataset-schema.html\">Replacing a dataset's schema</a>. </p>",
+        "smithy.api#idempotent": {}
+      }
+    },
+    "com.amazonaws.personalize#UpdateDatasetRequest": {
+      "type": "structure",
+      "members": {
+        "datasetArn": {
+          "target": "com.amazonaws.personalize#Arn",
+          "traits": {
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the dataset that you want to update.</p>",
+            "smithy.api#required": {}
+          }
+        },
+        "schemaArn": {
+          "target": "com.amazonaws.personalize#Arn",
+          "traits": {
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the new schema you want use.</p>",
+            "smithy.api#required": {}
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#input": {}
+      }
+    },
+    "com.amazonaws.personalize#UpdateDatasetResponse": {
+      "type": "structure",
+      "members": {
+        "datasetArn": {
+          "target": "com.amazonaws.personalize#Arn",
+          "traits": {
+            "smithy.api#documentation": "<p>The Amazon Resource Name (ARN) of the dataset you updated.</p>"
+          }
+        }
+      },
+      "traits": {
+        "smithy.api#output": {}
+      }
+    },
     "com.amazonaws.personalize#UpdateMetricAttribution": {
       "type": "operation",
       "input": {