diff --git a/packages/google-cloud-documentai/protos/google/cloud/documentai/v1/document.proto b/packages/google-cloud-documentai/protos/google/cloud/documentai/v1/document.proto
index eb4615c1845..467a44921a6 100644
--- a/packages/google-cloud-documentai/protos/google/cloud/documentai/v1/document.proto
+++ b/packages/google-cloud-documentai/protos/google/cloud/documentai/v1/document.proto
@@ -324,6 +324,9 @@ message Document {
       // - "unfilled_checkbox"
       // - "filled_checkbox"
       string value_type = 5;
+
+      // The history of this annotation.
+      Provenance provenance = 8;
     }
 
     // Detected language for a structural component.
@@ -385,6 +388,9 @@ message Document {
 
     // A list of visually detected form fields on the page.
     repeated FormField form_fields = 11;
+
+    // The history of this page.
+    Provenance provenance = 16;
   }
 
   // A phrase in the text that is a known entity type, such as a person, an
@@ -536,6 +542,8 @@ message Document {
 
       // Required. Index into the [Document.pages][google.cloud.documentai.v1.Document.pages] element, for example using
       // [Document.pages][page_refs.page] to locate the related page element.
+      // This field is skipped when its value is the default 0. See
+      // https://developers.google.com/protocol-buffers/docs/proto3#json.
       int64 page = 1 [(google.api.field_behavior) = REQUIRED];
 
       // Optional. The type of the layout element that is being referenced if any.
@@ -568,8 +576,12 @@ message Document {
       // The index of the [Document.revisions] identifying the parent revision.
       int32 revision = 1;
 
+      // The index of the parent revisions corresponding collection of items
+      // (eg. list of entities, properties within entities, etc.)
+      int32 index = 3;
+
       // The id of the parent provenance.
-      int32 id = 2;
+      int32 id = 2 [deprecated = true];
     }
 
     // If a processor or agent does an explicit operation on existing elements.
@@ -602,7 +614,7 @@ message Document {
 
     // The Id of this operation.  Needs to be unique within the scope of the
     // revision.
-    int32 id = 2;
+    int32 id = 2 [deprecated = true];
 
     // References to the original elements that are replaced.
     repeated Parent parents = 3;
diff --git a/packages/google-cloud-documentai/protos/google/cloud/documentai/v1/document_processor_service.proto b/packages/google-cloud-documentai/protos/google/cloud/documentai/v1/document_processor_service.proto
index 9f0b11a74de..65f0e6d967c 100644
--- a/packages/google-cloud-documentai/protos/google/cloud/documentai/v1/document_processor_service.proto
+++ b/packages/google-cloud-documentai/protos/google/cloud/documentai/v1/document_processor_service.proto
@@ -254,6 +254,18 @@ message BatchProcessMetadata {
 
 // Request message for review document method.
 message ReviewDocumentRequest {
+  reserved 2;
+
+  // The priority level of the human review task.
+  enum Priority {
+    // The default priority level.
+    DEFAULT = 0;
+
+    // The urgent priority level. The labeling manager should allocate labeler
+    // resource to the urgent task queue to respect this priority level.
+    URGENT = 1;
+  }
+
   // The document payload.
   oneof source {
     // An inline document proto.
@@ -268,6 +280,12 @@ message ReviewDocumentRequest {
       type: "documentai.googleapis.com/HumanReviewConfig"
     }
   ];
+
+  // Whether the validation should be performed on the ad-hoc review request.
+  bool enable_schema_validation = 3;
+
+  // The priority of the human review task.
+  Priority priority = 5;
 }
 
 // Response message for review document method.
diff --git a/packages/google-cloud-documentai/protos/protos.d.ts b/packages/google-cloud-documentai/protos/protos.d.ts
index 9c5d7578c3f..5504882a531 100644
--- a/packages/google-cloud-documentai/protos/protos.d.ts
+++ b/packages/google-cloud-documentai/protos/protos.d.ts
@@ -555,6 +555,9 @@ export namespace google {
 
                         /** Page formFields */
                         formFields?: (google.cloud.documentai.v1.Document.Page.IFormField[]|null);
+
+                        /** Page provenance */
+                        provenance?: (google.cloud.documentai.v1.Document.IProvenance|null);
                     }
 
                     /** Represents a Page. */
@@ -605,6 +608,9 @@ export namespace google {
                         /** Page formFields. */
                         public formFields: google.cloud.documentai.v1.Document.Page.IFormField[];
 
+                        /** Page provenance. */
+                        public provenance?: (google.cloud.documentai.v1.Document.IProvenance|null);
+
                         /**
                          * Creates a new Page instance using the specified properties.
                          * @param [properties] Properties to set
@@ -2062,6 +2068,9 @@ export namespace google {
 
                             /** FormField valueType */
                             valueType?: (string|null);
+
+                            /** FormField provenance */
+                            provenance?: (google.cloud.documentai.v1.Document.IProvenance|null);
                         }
 
                         /** Represents a FormField. */
@@ -2088,6 +2097,9 @@ export namespace google {
                             /** FormField valueType. */
                             public valueType: string;
 
+                            /** FormField provenance. */
+                            public provenance?: (google.cloud.documentai.v1.Document.IProvenance|null);
+
                             /**
                              * Creates a new FormField instance using the specified properties.
                              * @param [properties] Properties to set
@@ -3167,6 +3179,9 @@ export namespace google {
                             /** Parent revision */
                             revision?: (number|null);
 
+                            /** Parent index */
+                            index?: (number|null);
+
                             /** Parent id */
                             id?: (number|null);
                         }
@@ -3183,6 +3198,9 @@ export namespace google {
                             /** Parent revision. */
                             public revision: number;
 
+                            /** Parent index. */
+                            public index: number;
+
                             /** Parent id. */
                             public id: number;
 
@@ -5383,6 +5401,12 @@ export namespace google {
 
                     /** ReviewDocumentRequest humanReviewConfig */
                     humanReviewConfig?: (string|null);
+
+                    /** ReviewDocumentRequest enableSchemaValidation */
+                    enableSchemaValidation?: (boolean|null);
+
+                    /** ReviewDocumentRequest priority */
+                    priority?: (google.cloud.documentai.v1.ReviewDocumentRequest.Priority|keyof typeof google.cloud.documentai.v1.ReviewDocumentRequest.Priority|null);
                 }
 
                 /** Represents a ReviewDocumentRequest. */
@@ -5400,6 +5424,12 @@ export namespace google {
                     /** ReviewDocumentRequest humanReviewConfig. */
                     public humanReviewConfig: string;
 
+                    /** ReviewDocumentRequest enableSchemaValidation. */
+                    public enableSchemaValidation: boolean;
+
+                    /** ReviewDocumentRequest priority. */
+                    public priority: (google.cloud.documentai.v1.ReviewDocumentRequest.Priority|keyof typeof google.cloud.documentai.v1.ReviewDocumentRequest.Priority);
+
                     /** ReviewDocumentRequest source. */
                     public source?: "inlineDocument";
 
@@ -5474,6 +5504,15 @@ export namespace google {
                     public toJSON(): { [k: string]: any };
                 }
 
+                namespace ReviewDocumentRequest {
+
+                    /** Priority enum. */
+                    enum Priority {
+                        DEFAULT = 0,
+                        URGENT = 1
+                    }
+                }
+
                 /** Properties of a ReviewDocumentResponse. */
                 interface IReviewDocumentResponse {
 
diff --git a/packages/google-cloud-documentai/protos/protos.js b/packages/google-cloud-documentai/protos/protos.js
index b8d0a78350a..3bdbfbb41e9 100644
--- a/packages/google-cloud-documentai/protos/protos.js
+++ b/packages/google-cloud-documentai/protos/protos.js
@@ -1502,6 +1502,7 @@
                              * @property {Array.<google.cloud.documentai.v1.Document.Page.IVisualElement>|null} [visualElements] Page visualElements
                              * @property {Array.<google.cloud.documentai.v1.Document.Page.ITable>|null} [tables] Page tables
                              * @property {Array.<google.cloud.documentai.v1.Document.Page.IFormField>|null} [formFields] Page formFields
+                             * @property {google.cloud.documentai.v1.Document.IProvenance|null} [provenance] Page provenance
                              */
     
                             /**
@@ -1632,6 +1633,14 @@
                              */
                             Page.prototype.formFields = $util.emptyArray;
     
+                            /**
+                             * Page provenance.
+                             * @member {google.cloud.documentai.v1.Document.IProvenance|null|undefined} provenance
+                             * @memberof google.cloud.documentai.v1.Document.Page
+                             * @instance
+                             */
+                            Page.prototype.provenance = null;
+    
                             /**
                              * Creates a new Page instance using the specified properties.
                              * @function create
@@ -1691,6 +1700,8 @@
                                 if (message.transforms != null && message.transforms.length)
                                     for (var i = 0; i < message.transforms.length; ++i)
                                         $root.google.cloud.documentai.v1.Document.Page.Matrix.encode(message.transforms[i], writer.uint32(/* id 14, wireType 2 =*/114).fork()).ldelim();
+                                if (message.provenance != null && Object.hasOwnProperty.call(message, "provenance"))
+                                    $root.google.cloud.documentai.v1.Document.Provenance.encode(message.provenance, writer.uint32(/* id 16, wireType 2 =*/130).fork()).ldelim();
                                 return writer;
                             };
     
@@ -1782,6 +1793,9 @@
                                             message.formFields = [];
                                         message.formFields.push($root.google.cloud.documentai.v1.Document.Page.FormField.decode(reader, reader.uint32()));
                                         break;
+                                    case 16:
+                                        message.provenance = $root.google.cloud.documentai.v1.Document.Provenance.decode(reader, reader.uint32());
+                                        break;
                                     default:
                                         reader.skipType(tag & 7);
                                         break;
@@ -1916,6 +1930,11 @@
                                             return "formFields." + error;
                                     }
                                 }
+                                if (message.provenance != null && message.hasOwnProperty("provenance")) {
+                                    var error = $root.google.cloud.documentai.v1.Document.Provenance.verify(message.provenance);
+                                    if (error)
+                                        return "provenance." + error;
+                                }
                                 return null;
                             };
     
@@ -2038,6 +2057,11 @@
                                         message.formFields[i] = $root.google.cloud.documentai.v1.Document.Page.FormField.fromObject(object.formFields[i]);
                                     }
                                 }
+                                if (object.provenance != null) {
+                                    if (typeof object.provenance !== "object")
+                                        throw TypeError(".google.cloud.documentai.v1.Document.Page.provenance: object expected");
+                                    message.provenance = $root.google.cloud.documentai.v1.Document.Provenance.fromObject(object.provenance);
+                                }
                                 return message;
                             };
     
@@ -2070,6 +2094,7 @@
                                     object.dimension = null;
                                     object.layout = null;
                                     object.image = null;
+                                    object.provenance = null;
                                 }
                                 if (message.pageNumber != null && message.hasOwnProperty("pageNumber"))
                                     object.pageNumber = message.pageNumber;
@@ -2124,6 +2149,8 @@
                                     for (var j = 0; j < message.transforms.length; ++j)
                                         object.transforms[j] = $root.google.cloud.documentai.v1.Document.Page.Matrix.toObject(message.transforms[j], options);
                                 }
+                                if (message.provenance != null && message.hasOwnProperty("provenance"))
+                                    object.provenance = $root.google.cloud.documentai.v1.Document.Provenance.toObject(message.provenance, options);
                                 return object;
                             };
     
@@ -5601,6 +5628,7 @@
                                  * @property {Array.<google.cloud.documentai.v1.Document.Page.IDetectedLanguage>|null} [nameDetectedLanguages] FormField nameDetectedLanguages
                                  * @property {Array.<google.cloud.documentai.v1.Document.Page.IDetectedLanguage>|null} [valueDetectedLanguages] FormField valueDetectedLanguages
                                  * @property {string|null} [valueType] FormField valueType
+                                 * @property {google.cloud.documentai.v1.Document.IProvenance|null} [provenance] FormField provenance
                                  */
     
                                 /**
@@ -5660,6 +5688,14 @@
                                  */
                                 FormField.prototype.valueType = "";
     
+                                /**
+                                 * FormField provenance.
+                                 * @member {google.cloud.documentai.v1.Document.IProvenance|null|undefined} provenance
+                                 * @memberof google.cloud.documentai.v1.Document.Page.FormField
+                                 * @instance
+                                 */
+                                FormField.prototype.provenance = null;
+    
                                 /**
                                  * Creates a new FormField instance using the specified properties.
                                  * @function create
@@ -5696,6 +5732,8 @@
                                             $root.google.cloud.documentai.v1.Document.Page.DetectedLanguage.encode(message.valueDetectedLanguages[i], writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
                                     if (message.valueType != null && Object.hasOwnProperty.call(message, "valueType"))
                                         writer.uint32(/* id 5, wireType 2 =*/42).string(message.valueType);
+                                    if (message.provenance != null && Object.hasOwnProperty.call(message, "provenance"))
+                                        $root.google.cloud.documentai.v1.Document.Provenance.encode(message.provenance, writer.uint32(/* id 8, wireType 2 =*/66).fork()).ldelim();
                                     return writer;
                                 };
     
@@ -5749,6 +5787,9 @@
                                         case 5:
                                             message.valueType = reader.string();
                                             break;
+                                        case 8:
+                                            message.provenance = $root.google.cloud.documentai.v1.Document.Provenance.decode(reader, reader.uint32());
+                                            break;
                                         default:
                                             reader.skipType(tag & 7);
                                             break;
@@ -5815,6 +5856,11 @@
                                     if (message.valueType != null && message.hasOwnProperty("valueType"))
                                         if (!$util.isString(message.valueType))
                                             return "valueType: string expected";
+                                    if (message.provenance != null && message.hasOwnProperty("provenance")) {
+                                        var error = $root.google.cloud.documentai.v1.Document.Provenance.verify(message.provenance);
+                                        if (error)
+                                            return "provenance." + error;
+                                    }
                                     return null;
                                 };
     
@@ -5862,6 +5908,11 @@
                                     }
                                     if (object.valueType != null)
                                         message.valueType = String(object.valueType);
+                                    if (object.provenance != null) {
+                                        if (typeof object.provenance !== "object")
+                                            throw TypeError(".google.cloud.documentai.v1.Document.Page.FormField.provenance: object expected");
+                                        message.provenance = $root.google.cloud.documentai.v1.Document.Provenance.fromObject(object.provenance);
+                                    }
                                     return message;
                                 };
     
@@ -5886,6 +5937,7 @@
                                         object.fieldName = null;
                                         object.fieldValue = null;
                                         object.valueType = "";
+                                        object.provenance = null;
                                     }
                                     if (message.fieldName != null && message.hasOwnProperty("fieldName"))
                                         object.fieldName = $root.google.cloud.documentai.v1.Document.Page.Layout.toObject(message.fieldName, options);
@@ -5903,6 +5955,8 @@
                                     }
                                     if (message.valueType != null && message.hasOwnProperty("valueType"))
                                         object.valueType = message.valueType;
+                                    if (message.provenance != null && message.hasOwnProperty("provenance"))
+                                        object.provenance = $root.google.cloud.documentai.v1.Document.Provenance.toObject(message.provenance, options);
                                     return object;
                                 };
     
@@ -8538,6 +8592,7 @@
                                  * @memberof google.cloud.documentai.v1.Document.Provenance
                                  * @interface IParent
                                  * @property {number|null} [revision] Parent revision
+                                 * @property {number|null} [index] Parent index
                                  * @property {number|null} [id] Parent id
                                  */
     
@@ -8564,6 +8619,14 @@
                                  */
                                 Parent.prototype.revision = 0;
     
+                                /**
+                                 * Parent index.
+                                 * @member {number} index
+                                 * @memberof google.cloud.documentai.v1.Document.Provenance.Parent
+                                 * @instance
+                                 */
+                                Parent.prototype.index = 0;
+    
                                 /**
                                  * Parent id.
                                  * @member {number} id
@@ -8600,6 +8663,8 @@
                                         writer.uint32(/* id 1, wireType 0 =*/8).int32(message.revision);
                                     if (message.id != null && Object.hasOwnProperty.call(message, "id"))
                                         writer.uint32(/* id 2, wireType 0 =*/16).int32(message.id);
+                                    if (message.index != null && Object.hasOwnProperty.call(message, "index"))
+                                        writer.uint32(/* id 3, wireType 0 =*/24).int32(message.index);
                                     return writer;
                                 };
     
@@ -8637,6 +8702,9 @@
                                         case 1:
                                             message.revision = reader.int32();
                                             break;
+                                        case 3:
+                                            message.index = reader.int32();
+                                            break;
                                         case 2:
                                             message.id = reader.int32();
                                             break;
@@ -8678,6 +8746,9 @@
                                     if (message.revision != null && message.hasOwnProperty("revision"))
                                         if (!$util.isInteger(message.revision))
                                             return "revision: integer expected";
+                                    if (message.index != null && message.hasOwnProperty("index"))
+                                        if (!$util.isInteger(message.index))
+                                            return "index: integer expected";
                                     if (message.id != null && message.hasOwnProperty("id"))
                                         if (!$util.isInteger(message.id))
                                             return "id: integer expected";
@@ -8698,6 +8769,8 @@
                                     var message = new $root.google.cloud.documentai.v1.Document.Provenance.Parent();
                                     if (object.revision != null)
                                         message.revision = object.revision | 0;
+                                    if (object.index != null)
+                                        message.index = object.index | 0;
                                     if (object.id != null)
                                         message.id = object.id | 0;
                                     return message;
@@ -8719,11 +8792,14 @@
                                     if (options.defaults) {
                                         object.revision = 0;
                                         object.id = 0;
+                                        object.index = 0;
                                     }
                                     if (message.revision != null && message.hasOwnProperty("revision"))
                                         object.revision = message.revision;
                                     if (message.id != null && message.hasOwnProperty("id"))
                                         object.id = message.id;
+                                    if (message.index != null && message.hasOwnProperty("index"))
+                                        object.index = message.index;
                                     return object;
                                 };
     
@@ -13728,6 +13804,8 @@
                          * @interface IReviewDocumentRequest
                          * @property {google.cloud.documentai.v1.IDocument|null} [inlineDocument] ReviewDocumentRequest inlineDocument
                          * @property {string|null} [humanReviewConfig] ReviewDocumentRequest humanReviewConfig
+                         * @property {boolean|null} [enableSchemaValidation] ReviewDocumentRequest enableSchemaValidation
+                         * @property {google.cloud.documentai.v1.ReviewDocumentRequest.Priority|null} [priority] ReviewDocumentRequest priority
                          */
     
                         /**
@@ -13761,6 +13839,22 @@
                          */
                         ReviewDocumentRequest.prototype.humanReviewConfig = "";
     
+                        /**
+                         * ReviewDocumentRequest enableSchemaValidation.
+                         * @member {boolean} enableSchemaValidation
+                         * @memberof google.cloud.documentai.v1.ReviewDocumentRequest
+                         * @instance
+                         */
+                        ReviewDocumentRequest.prototype.enableSchemaValidation = false;
+    
+                        /**
+                         * ReviewDocumentRequest priority.
+                         * @member {google.cloud.documentai.v1.ReviewDocumentRequest.Priority} priority
+                         * @memberof google.cloud.documentai.v1.ReviewDocumentRequest
+                         * @instance
+                         */
+                        ReviewDocumentRequest.prototype.priority = 0;
+    
                         // OneOf field names bound to virtual getters and setters
                         var $oneOfFields;
     
@@ -13801,8 +13895,12 @@
                                 writer = $Writer.create();
                             if (message.humanReviewConfig != null && Object.hasOwnProperty.call(message, "humanReviewConfig"))
                                 writer.uint32(/* id 1, wireType 2 =*/10).string(message.humanReviewConfig);
+                            if (message.enableSchemaValidation != null && Object.hasOwnProperty.call(message, "enableSchemaValidation"))
+                                writer.uint32(/* id 3, wireType 0 =*/24).bool(message.enableSchemaValidation);
                             if (message.inlineDocument != null && Object.hasOwnProperty.call(message, "inlineDocument"))
                                 $root.google.cloud.documentai.v1.Document.encode(message.inlineDocument, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                            if (message.priority != null && Object.hasOwnProperty.call(message, "priority"))
+                                writer.uint32(/* id 5, wireType 0 =*/40).int32(message.priority);
                             return writer;
                         };
     
@@ -13843,6 +13941,12 @@
                                 case 1:
                                     message.humanReviewConfig = reader.string();
                                     break;
+                                case 3:
+                                    message.enableSchemaValidation = reader.bool();
+                                    break;
+                                case 5:
+                                    message.priority = reader.int32();
+                                    break;
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -13890,6 +13994,17 @@
                             if (message.humanReviewConfig != null && message.hasOwnProperty("humanReviewConfig"))
                                 if (!$util.isString(message.humanReviewConfig))
                                     return "humanReviewConfig: string expected";
+                            if (message.enableSchemaValidation != null && message.hasOwnProperty("enableSchemaValidation"))
+                                if (typeof message.enableSchemaValidation !== "boolean")
+                                    return "enableSchemaValidation: boolean expected";
+                            if (message.priority != null && message.hasOwnProperty("priority"))
+                                switch (message.priority) {
+                                default:
+                                    return "priority: enum value expected";
+                                case 0:
+                                case 1:
+                                    break;
+                                }
                             return null;
                         };
     
@@ -13912,6 +14027,18 @@
                             }
                             if (object.humanReviewConfig != null)
                                 message.humanReviewConfig = String(object.humanReviewConfig);
+                            if (object.enableSchemaValidation != null)
+                                message.enableSchemaValidation = Boolean(object.enableSchemaValidation);
+                            switch (object.priority) {
+                            case "DEFAULT":
+                            case 0:
+                                message.priority = 0;
+                                break;
+                            case "URGENT":
+                            case 1:
+                                message.priority = 1;
+                                break;
+                            }
                             return message;
                         };
     
@@ -13928,15 +14055,22 @@
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults)
+                            if (options.defaults) {
                                 object.humanReviewConfig = "";
+                                object.enableSchemaValidation = false;
+                                object.priority = options.enums === String ? "DEFAULT" : 0;
+                            }
                             if (message.humanReviewConfig != null && message.hasOwnProperty("humanReviewConfig"))
                                 object.humanReviewConfig = message.humanReviewConfig;
+                            if (message.enableSchemaValidation != null && message.hasOwnProperty("enableSchemaValidation"))
+                                object.enableSchemaValidation = message.enableSchemaValidation;
                             if (message.inlineDocument != null && message.hasOwnProperty("inlineDocument")) {
                                 object.inlineDocument = $root.google.cloud.documentai.v1.Document.toObject(message.inlineDocument, options);
                                 if (options.oneofs)
                                     object.source = "inlineDocument";
                             }
+                            if (message.priority != null && message.hasOwnProperty("priority"))
+                                object.priority = options.enums === String ? $root.google.cloud.documentai.v1.ReviewDocumentRequest.Priority[message.priority] : message.priority;
                             return object;
                         };
     
@@ -13951,6 +14085,20 @@
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
+                        /**
+                         * Priority enum.
+                         * @name google.cloud.documentai.v1.ReviewDocumentRequest.Priority
+                         * @enum {number}
+                         * @property {number} DEFAULT=0 DEFAULT value
+                         * @property {number} URGENT=1 URGENT value
+                         */
+                        ReviewDocumentRequest.Priority = (function() {
+                            var valuesById = {}, values = Object.create(valuesById);
+                            values[valuesById[0] = "DEFAULT"] = 0;
+                            values[valuesById[1] = "URGENT"] = 1;
+                            return values;
+                        })();
+    
                         return ReviewDocumentRequest;
                     })();
     
diff --git a/packages/google-cloud-documentai/protos/protos.json b/packages/google-cloud-documentai/protos/protos.json
index 0210786328c..b7abceda7ac 100644
--- a/packages/google-cloud-documentai/protos/protos.json
+++ b/packages/google-cloud-documentai/protos/protos.json
@@ -218,6 +218,10 @@
                               "rule": "repeated",
                               "type": "FormField",
                               "id": 11
+                            },
+                            "provenance": {
+                              "type": "Provenance",
+                              "id": 16
                             }
                           },
                           "nested": {
@@ -495,6 +499,10 @@
                                 "valueType": {
                                   "type": "string",
                                   "id": 5
+                                },
+                                "provenance": {
+                                  "type": "Provenance",
+                                  "id": 8
                                 }
                               }
                             },
@@ -751,7 +759,10 @@
                             },
                             "id": {
                               "type": "int32",
-                              "id": 2
+                              "id": 2,
+                              "options": {
+                                "deprecated": true
+                              }
                             },
                             "parents": {
                               "rule": "repeated",
@@ -770,9 +781,16 @@
                                   "type": "int32",
                                   "id": 1
                                 },
+                                "index": {
+                                  "type": "int32",
+                                  "id": 3
+                                },
                                 "id": {
                                   "type": "int32",
-                                  "id": 2
+                                  "id": 2,
+                                  "options": {
+                                    "deprecated": true
+                                  }
                                 }
                               }
                             },
@@ -1243,6 +1261,28 @@
                             "(google.api.field_behavior)": "REQUIRED",
                             "(google.api.resource_reference).type": "documentai.googleapis.com/HumanReviewConfig"
                           }
+                        },
+                        "enableSchemaValidation": {
+                          "type": "bool",
+                          "id": 3
+                        },
+                        "priority": {
+                          "type": "Priority",
+                          "id": 5
+                        }
+                      },
+                      "reserved": [
+                        [
+                          2,
+                          2
+                        ]
+                      ],
+                      "nested": {
+                        "Priority": {
+                          "values": {
+                            "DEFAULT": 0,
+                            "URGENT": 1
+                          }
                         }
                       }
                     },
diff --git a/packages/google-cloud-documentai/src/v1/document_processor_service_client.ts b/packages/google-cloud-documentai/src/v1/document_processor_service_client.ts
index 8f7d6e99eff..dff16ac1453 100644
--- a/packages/google-cloud-documentai/src/v1/document_processor_service_client.ts
+++ b/packages/google-cloud-documentai/src/v1/document_processor_service_client.ts
@@ -617,6 +617,10 @@ export class DocumentProcessorServiceClient {
    * @param {string} request.humanReviewConfig
    *   Required. The resource name of the HumanReviewConfig that the document will be
    *   reviewed with.
+   * @param {boolean} request.enableSchemaValidation
+   *   Whether the validation should be performed on the ad-hoc review request.
+   * @param {google.cloud.documentai.v1.ReviewDocumentRequest.Priority} request.priority
+   *   The priority of the human review task.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Promise} - The promise which resolves to an array.