From 624b052e0d1306adf64587e0251574ae01719714 Mon Sep 17 00:00:00 2001
From: Google APIs <noreply@google.com>
Date: Thu, 4 Apr 2024 10:44:55 -0700
Subject: [PATCH] feat: support import data from Cloud Spanner, BigTable, SQL
 and Firestore feat: support standalone ranking API feat: support layout
 detection and more chunking features feat: support advanced search boosting
 docs: keep the API doc up-to-date with recent changes

PiperOrigin-RevId: 621906335
---
 .../cloud/discoveryengine/v1alpha/BUILD.bazel |   4 +
 .../cloud/discoveryengine/v1alpha/chunk.proto |  36 +-
 .../discoveryengine/v1alpha/common.proto      |  20 ++
 .../v1alpha/discoveryengine_v1alpha.yaml      |   9 +
 .../discoveryengine/v1alpha/document.proto    |  19 +
 .../v1alpha/document_service.proto            |  64 ++++
 .../v1alpha/import_config.proto               | 333 ++++++++++++++++--
 .../v1alpha/rank_service.proto                | 115 ++++++
 .../v1alpha/search_service.proto              | 176 +++++++--
 .../v1alpha/search_tuning_service.proto       |   7 +-
 .../v1alpha/serving_config_service.proto      |   3 +-
 11 files changed, 738 insertions(+), 48 deletions(-)
 create mode 100644 google/cloud/discoveryengine/v1alpha/rank_service.proto

diff --git a/google/cloud/discoveryengine/v1alpha/BUILD.bazel b/google/cloud/discoveryengine/v1alpha/BUILD.bazel
index 136e7526f731c..6e8266f484f78 100644
--- a/google/cloud/discoveryengine/v1alpha/BUILD.bazel
+++ b/google/cloud/discoveryengine/v1alpha/BUILD.bazel
@@ -43,6 +43,7 @@ proto_library(
         "estimate_billing_service.proto",
         "import_config.proto",
         "purge_config.proto",
+        "rank_service.proto",
         "recommendation_service.proto",
         "schema.proto",
         "schema_service.proto",
@@ -143,6 +144,8 @@ java_gapic_test(
         "com.google.cloud.discoveryengine.v1alpha.EngineServiceClientTest",
         "com.google.cloud.discoveryengine.v1alpha.EstimateBillingServiceClientHttpJsonTest",
         "com.google.cloud.discoveryengine.v1alpha.EstimateBillingServiceClientTest",
+        "com.google.cloud.discoveryengine.v1alpha.RankServiceClientHttpJsonTest",
+        "com.google.cloud.discoveryengine.v1alpha.RankServiceClientTest",
         "com.google.cloud.discoveryengine.v1alpha.RecommendationServiceClientHttpJsonTest",
         "com.google.cloud.discoveryengine.v1alpha.RecommendationServiceClientTest",
         "com.google.cloud.discoveryengine.v1alpha.SchemaServiceClientHttpJsonTest",
@@ -403,6 +406,7 @@ load(
 
 csharp_proto_library(
     name = "discoveryengine_csharp_proto",
+    extra_opts = [],
     deps = [":discoveryengine_proto"],
 )
 
diff --git a/google/cloud/discoveryengine/v1alpha/chunk.proto b/google/cloud/discoveryengine/v1alpha/chunk.proto
index 0d3578d264528..a30c5dd274f2d 100644
--- a/google/cloud/discoveryengine/v1alpha/chunk.proto
+++ b/google/cloud/discoveryengine/v1alpha/chunk.proto
@@ -48,6 +48,34 @@ message Chunk {
     string title = 2;
   }
 
+  // Page span of the chunk.
+  message PageSpan {
+    // The start page of the chunk.
+    int32 page_start = 1;
+
+    // The end page of the chunk.
+    int32 page_end = 2;
+  }
+
+  // Metadata of the current chunk. This field is only populated on
+  // [SearchService.Search][google.cloud.discoveryengine.v1alpha.SearchService.Search]
+  // API.
+  message ChunkMetadata {
+    // The previous chunks of the current chunk. The number is controlled by
+    // [SearchRequest.ContentSearchSpec.ChunkSpec.num_previous_chunks][google.cloud.discoveryengine.v1alpha.SearchRequest.ContentSearchSpec.ChunkSpec.num_previous_chunks].
+    // This field is only populated on
+    // [SearchService.Search][google.cloud.discoveryengine.v1alpha.SearchService.Search]
+    // API.
+    repeated Chunk previous_chunks = 1;
+
+    // The next chunks of the current chunk. The number is controlled by
+    // [SearchRequest.ContentSearchSpec.ChunkSpec.num_next_chunks][google.cloud.discoveryengine.v1alpha.SearchRequest.ContentSearchSpec.ChunkSpec.num_next_chunks].
+    // This field is only populated on
+    // [SearchService.Search][google.cloud.discoveryengine.v1alpha.SearchService.Search]
+    // API.
+    repeated Chunk next_chunks = 2;
+  }
+
   // The full resource name of the chunk.
   // Format:
   // `projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document_id}/chunks/{chunk_id}`.
@@ -56,7 +84,7 @@ message Chunk {
   // characters.
   string name = 1;
 
-  // Unique chunk id of the current chunk.
+  // Unique chunk ID of the current chunk.
   string id = 2;
 
   // Content is a string from a document (parsed content).
@@ -69,4 +97,10 @@ message Chunk {
   // It contains derived data that are not in the original input document.
   google.protobuf.Struct derived_struct_data = 4
       [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Page span of the chunk.
+  PageSpan page_span = 6;
+
+  // Output only. Metadata of the current chunk.
+  ChunkMetadata chunk_metadata = 7 [(google.api.field_behavior) = OUTPUT_ONLY];
 }
diff --git a/google/cloud/discoveryengine/v1alpha/common.proto b/google/cloud/discoveryengine/v1alpha/common.proto
index c096c9c489800..026a6bf6a92e8 100644
--- a/google/cloud/discoveryengine/v1alpha/common.proto
+++ b/google/cloud/discoveryengine/v1alpha/common.proto
@@ -39,6 +39,18 @@ option (google.api.resource_definition) = {
   type: "discoveryengine.googleapis.com/Location"
   pattern: "projects/{project}/locations/{location}"
 };
+option (google.api.resource_definition) = {
+  type: "discoveryengine.googleapis.com/GroundingConfig"
+  pattern: "projects/{project}/locations/{location}/groundingConfigs/{grounding_config}"
+};
+option (google.api.resource_definition) = {
+  type: "discoveryengine.googleapis.com/RankingConfig"
+  pattern: "projects/{project}/locations/{location}/rankingConfigs/{ranking_config}"
+};
+option (google.api.resource_definition) = {
+  type: "healthcare.googleapis.com/FhirStore"
+  pattern: "projects/{project}/locations/{location}/datasets/{dataset}/fhirStores/{fhir_store}"
+};
 
 // The industry vertical associated with the
 // [DataStore][google.cloud.discoveryengine.v1alpha.DataStore].
@@ -52,6 +64,9 @@ enum IndustryVertical {
 
   // The media industry vertical.
   MEDIA = 2;
+
+  // The healthcare FHIR vertical.
+  HEALTHCARE_FHIR = 7;
 }
 
 // The type of solution.
@@ -67,6 +82,11 @@ enum SolutionType {
 
   // Used for use cases related to the Generative AI agent.
   SOLUTION_TYPE_CHAT = 3;
+
+  // Used for use cases related to the Generative Chat agent.
+  // It's used for Generative chat engine only, the associated data stores
+  // must enrolled with `SOLUTION_TYPE_CHAT` solution.
+  SOLUTION_TYPE_GENERATIVE_CHAT = 4;
 }
 
 // Tiers of search features. Different tiers might have different
diff --git a/google/cloud/discoveryengine/v1alpha/discoveryengine_v1alpha.yaml b/google/cloud/discoveryengine/v1alpha/discoveryengine_v1alpha.yaml
index 85f0b637506a6..3d8a8580b948f 100644
--- a/google/cloud/discoveryengine/v1alpha/discoveryengine_v1alpha.yaml
+++ b/google/cloud/discoveryengine/v1alpha/discoveryengine_v1alpha.yaml
@@ -12,6 +12,7 @@ apis:
 - name: google.cloud.discoveryengine.v1alpha.DocumentService
 - name: google.cloud.discoveryengine.v1alpha.EngineService
 - name: google.cloud.discoveryengine.v1alpha.EstimateBillingService
+- name: google.cloud.discoveryengine.v1alpha.RankService
 - name: google.cloud.discoveryengine.v1alpha.RecommendationService
 - name: google.cloud.discoveryengine.v1alpha.SchemaService
 - name: google.cloud.discoveryengine.v1alpha.SearchService
@@ -45,6 +46,9 @@ types:
 - name: google.cloud.discoveryengine.v1alpha.EstimateDataSizeMetadata
 - name: google.cloud.discoveryengine.v1alpha.EstimateDataSizeResponse
 - name: google.cloud.discoveryengine.v1alpha.FieldConfig
+- name: google.cloud.discoveryengine.v1alpha.GroundingConfig
+- name: google.cloud.discoveryengine.v1alpha.ImportCompletionSuggestionsMetadata
+- name: google.cloud.discoveryengine.v1alpha.ImportCompletionSuggestionsResponse
 - name: google.cloud.discoveryengine.v1alpha.ImportDocumentsMetadata
 - name: google.cloud.discoveryengine.v1alpha.ImportDocumentsResponse
 - name: google.cloud.discoveryengine.v1alpha.ImportSuggestionDenyListEntriesMetadata
@@ -87,6 +91,7 @@ http:
     - get: '/v1alpha/{name=projects/*/locations/*/dataStores/*/branches/*/operations/*}'
     - get: '/v1alpha/{name=projects/*/locations/*/dataStores/*/models/*/operations/*}'
     - get: '/v1alpha/{name=projects/*/locations/*/dataStores/*/operations/*}'
+    - get: '/v1alpha/{name=projects/*/locations/*/evaluations/*/operations/*}'
     - get: '/v1alpha/{name=projects/*/locations/*/operations/*}'
     - get: '/v1alpha/{name=projects/*/operations/*}'
   - selector: google.longrunning.Operations.ListOperations
@@ -148,6 +153,10 @@ authentication:
     oauth:
       canonical_scopes: |-
         https://www.googleapis.com/auth/cloud-platform
+  - selector: google.cloud.discoveryengine.v1alpha.RankService.Rank
+    oauth:
+      canonical_scopes: |-
+        https://www.googleapis.com/auth/cloud-platform
   - selector: google.cloud.discoveryengine.v1alpha.RecommendationService.Recommend
     oauth:
       canonical_scopes: |-
diff --git a/google/cloud/discoveryengine/v1alpha/document.proto b/google/cloud/discoveryengine/v1alpha/document.proto
index 88fd88868243a..cead31c531a5a 100644
--- a/google/cloud/discoveryengine/v1alpha/document.proto
+++ b/google/cloud/discoveryengine/v1alpha/document.proto
@@ -202,3 +202,22 @@ message Document {
   google.protobuf.Timestamp index_time = 13
       [(google.api.field_behavior) = OUTPUT_ONLY];
 }
+
+// Document captures all raw metadata information of items to be recommended or
+// searched.
+message ProcessedDocument {
+  // Output format of the processed document.
+  oneof processed_data_format {
+    // The JSON string representation of the processed document.
+    string json_data = 2;
+  }
+
+  // Required. Full resource name of the referenced document, in the format
+  // `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
+  string document = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "discoveryengine.googleapis.com/Document"
+    }
+  ];
+}
diff --git a/google/cloud/discoveryengine/v1alpha/document_service.proto b/google/cloud/discoveryengine/v1alpha/document_service.proto
index c4d18d23ffd44..6e954a9f6cd2e 100644
--- a/google/cloud/discoveryengine/v1alpha/document_service.proto
+++ b/google/cloud/discoveryengine/v1alpha/document_service.proto
@@ -158,6 +158,19 @@ service DocumentService {
       metadata_type: "google.cloud.discoveryengine.v1alpha.PurgeDocumentsMetadata"
     };
   }
+
+  // Gets the parsed layout information for a
+  // [Document][google.cloud.discoveryengine.v1alpha.Document].
+  rpc GetProcessedDocument(GetProcessedDocumentRequest)
+      returns (ProcessedDocument) {
+    option (google.api.http) = {
+      get: "/v1alpha/{name=projects/*/locations/*/dataStores/*/branches/*/documents/*}:getProcessedDocument"
+      additional_bindings {
+        get: "/v1alpha/{name=projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*}:getProcessedDocument"
+      }
+    };
+    option (google.api.method_signature) = "name";
+  }
 }
 
 // Request message for
@@ -322,3 +335,54 @@ message DeleteDocumentRequest {
     }
   ];
 }
+
+// Request message for
+// [DocumentService.GetDocument][google.cloud.discoveryengine.v1alpha.DocumentService.GetDocument]
+// method.
+message GetProcessedDocumentRequest {
+  // The type of processing to return in the response.
+  enum ProcessedDocumentType {
+    // Default value.
+    PROCESSED_DOCUMENT_TYPE_UNSPECIFIED = 0;
+
+    // Available for all data store parsing configs.
+    PARSED_DOCUMENT = 1;
+
+    // Only available if ChunkingConfig is enabeld on the data store.
+    CHUNKED_DOCUMENT = 2;
+  }
+
+  // The format of the returned processed document. If unspecified, defaults to
+  // JSON.
+  enum ProcessedDocumentFormat {
+    // Default value.
+    PROCESSED_DOCUMENT_FORMAT_UNSPECIFIED = 0;
+
+    // output format will be a JSON string representation of processed document.
+    JSON = 1;
+  }
+
+  // Required. Full resource name of
+  // [Document][google.cloud.discoveryengine.v1alpha.Document], such as
+  // `projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}`.
+  //
+  // If the caller does not have permission to access the
+  // [Document][google.cloud.discoveryengine.v1alpha.Document], regardless of
+  // whether or not it exists, a `PERMISSION_DENIED` error is returned.
+  //
+  // If the requested [Document][google.cloud.discoveryengine.v1alpha.Document]
+  // does not exist, a `NOT_FOUND` error is returned.
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "discoveryengine.googleapis.com/Document"
+    }
+  ];
+
+  // Required. What type of processing to return.
+  ProcessedDocumentType processed_document_type = 2
+      [(google.api.field_behavior) = REQUIRED];
+
+  // What format output should be.  If unspecified, defaults to JSON.
+  ProcessedDocumentFormat processed_document_format = 3;
+}
diff --git a/google/cloud/discoveryengine/v1alpha/import_config.proto b/google/cloud/discoveryengine/v1alpha/import_config.proto
index f6c45aecf186e..062406a9b5f9a 100644
--- a/google/cloud/discoveryengine/v1alpha/import_config.proto
+++ b/google/cloud/discoveryengine/v1alpha/import_config.proto
@@ -21,6 +21,7 @@ import "google/api/resource.proto";
 import "google/cloud/discoveryengine/v1alpha/completion.proto";
 import "google/cloud/discoveryengine/v1alpha/document.proto";
 import "google/cloud/discoveryengine/v1alpha/user_event.proto";
+import "google/protobuf/field_mask.proto";
 import "google/protobuf/timestamp.proto";
 import "google/rpc/status.proto";
 import "google/type/date.proto";
@@ -123,6 +124,233 @@ message BigQuerySource {
   string data_schema = 6;
 }
 
+// The Spanner source for importing data
+message SpannerSource {
+  // The project ID that the Spanner source is in with a length limit of 128
+  // characters. If not specified, inherits the project ID from the parent
+  // request.
+  string project_id = 1;
+
+  // Required. The instance ID of the source Spanner table.
+  string instance_id = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The database ID of the source Spanner table.
+  string database_id = 3 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The table name of the Spanner database that needs to be imported.
+  string table_id = 4 [(google.api.field_behavior) = REQUIRED];
+
+  // Whether to apply data boost on Spanner export. Enabling this option will
+  // incur additional cost. More info can be found
+  // [here](https://cloud.google.com/spanner/docs/databoost/databoost-overview#billing_and_quotas).
+  bool enable_data_boost = 5;
+}
+
+// The Bigtable Options object that contains information to support
+// the import.
+message BigtableOptions {
+  // The column family of the Bigtable.
+  message BigtableColumnFamily {
+    // The field name to use for this column family in the document. The
+    // name has to match the pattern `[a-zA-Z0-9][a-zA-Z0-9-_]*`. If not set,
+    // it is parsed from the family name with best effort. However, due to
+    // different naming patterns, field name collisions could happen, where
+    // parsing behavior is undefined.
+    string field_name = 1;
+
+    // The encoding mode of the values when the type is not STRING.
+    // Acceptable encoding values are:
+    //
+    // * `TEXT`: indicates values are alphanumeric text strings.
+    // * `BINARY`: indicates values are encoded using `HBase Bytes.toBytes`
+    // family of functions. This can be overridden for a specific column
+    // by listing that column in `columns` and specifying an encoding for it.
+    Encoding encoding = 2;
+
+    // The type of values in this column family.
+    // The values are expected to be encoded using `HBase Bytes.toBytes`
+    // function when the encoding value is set to `BINARY`.
+    Type type = 3;
+
+    // The list of objects that contains column level information for each
+    // column. If a column is not present in this list it will be ignored.
+    repeated BigtableColumn columns = 4;
+  }
+
+  // The column of the Bigtable.
+  message BigtableColumn {
+    // Required. Qualifier of the column. If it cannot be decoded with utf-8,
+    // use a base-64 encoded string instead.
+    bytes qualifier = 1 [(google.api.field_behavior) = REQUIRED];
+
+    // The field name to use for this column in the document. The name has to
+    // match the pattern `[a-zA-Z0-9][a-zA-Z0-9-_]*`.
+    // If not set, it is parsed from the qualifier bytes with best effort.
+    // However, due to different naming patterns, field name collisions could
+    // happen, where parsing behavior is undefined.
+    string field_name = 2;
+
+    // The encoding mode of the values when the type is not `STRING`.
+    // Acceptable encoding values are:
+    //
+    // * `TEXT`: indicates values are alphanumeric text strings.
+    // * `BINARY`: indicates values are encoded using `HBase Bytes.toBytes`
+    // family of functions. This can be overridden for a specific column
+    // by listing that column in `columns` and specifying an encoding for it.
+    Encoding encoding = 3;
+
+    // The type of values in this column family.
+    // The values are expected to be encoded using `HBase Bytes.toBytes`
+    // function when the encoding value is set to `BINARY`.
+    Type type = 4;
+  }
+
+  // The type of values in a Bigtable column or column family.
+  // The values are expected to be encoded using
+  // [HBase
+  // Bytes.toBytes](https://hbase.apache.org/apidocs/org/apache/hadoop/hbase/util/Bytes.html)
+  // function when the encoding value is set to `BINARY`.
+  enum Type {
+    // The type is unspecified.
+    TYPE_UNSPECIFIED = 0;
+
+    // String type.
+    STRING = 1;
+
+    // Numerical type.
+    NUMBER = 2;
+
+    // Integer type.
+    INTEGER = 3;
+
+    // Variable length integer type.
+    VAR_INTEGER = 4;
+
+    // BigDecimal type.
+    BIG_NUMERIC = 5;
+
+    // Boolean type.
+    BOOLEAN = 6;
+
+    // JSON type.
+    JSON = 7;
+  }
+
+  // The encoding mode of a Bigtable column or column family.
+  enum Encoding {
+    // The encoding is unspecified.
+    ENCODING_UNSPECIFIED = 0;
+
+    // Text encoding.
+    TEXT = 1;
+
+    // Binary encoding.
+    BINARY = 2;
+  }
+
+  // The field name used for saving row key value in the document. The name has
+  // to match the pattern `[a-zA-Z0-9][a-zA-Z0-9-_]*`.
+  string key_field_name = 1;
+
+  // The mapping from family names to an object that contains column families
+  // level information for the given column family. If a family is not present
+  // in this map it will be ignored.
+  map<string, BigtableColumnFamily> families = 2;
+}
+
+// The Cloud Bigtable source for importing data.
+message BigtableSource {
+  // The project ID that the Bigtable source is in with a length limit of 128
+  // characters. If not specified, inherits the project ID from the parent
+  // request.
+  string project_id = 1;
+
+  // Required. The instance ID of the Cloud Bigtable that needs to be imported.
+  string instance_id = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The table ID of the Cloud Bigtable that needs to be imported.
+  string table_id = 3 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. Bigtable options that contains information needed when parsing
+  // data into typed structures. For example, column type annotations.
+  BigtableOptions bigtable_options = 4 [(google.api.field_behavior) = REQUIRED];
+}
+
+// Cloud FhirStore source import data from.
+message FhirStoreSource {
+  // Required. The full resource name of the FHIR store to import data from, in
+  // the format of
+  // `projects/{project}/locations/{location}/datasets/{dataset}/fhirStores/{fhir_store}`.
+  string fhir_store = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "healthcare.googleapis.com/FhirStore"
+    }
+  ];
+
+  // Intermediate Cloud Storage directory used for the import with a length
+  // limit of 2,000 characters. Can be specified if one wants to have the
+  // FhirStore export to a specific Cloud Storage directory.
+  string gcs_staging_dir = 2;
+}
+
+// Cloud SQL source import data from.
+message CloudSqlSource {
+  // The project ID that the Cloud SQL source is in with a length limit of 128
+  // characters. If not specified, inherits the project ID from the parent
+  // request.
+  string project_id = 1;
+
+  // Required. The Cloud SQL instance to copy the data from with a length limit
+  // of 256 characters.
+  string instance_id = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The Cloud SQL database to copy the data from with a length limit
+  // of 256 characters.
+  string database_id = 3 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The Cloud SQL table to copy the data from with a length limit of
+  // 256 characters.
+  string table_id = 4 [(google.api.field_behavior) = REQUIRED];
+
+  // Intermediate Cloud Storage directory used for the import with a length
+  // limit of 2,000 characters. Can be specified if one wants to have the
+  // Cloud SQL export to a specific Cloud Storage directory.
+  //
+  // Please ensure that the Cloud SQL service account has the necessary Cloud
+  // Storage Admin permissions to access the specified Cloud Storage directory.
+  string gcs_staging_dir = 5;
+
+  // Option for serverless export. Enabling this option will incur
+  // additional cost. More info can be found
+  // [here](https://cloud.google.com/sql/pricing#serverless).
+  bool offload = 6;
+}
+
+// Firestore source import data from.
+message FirestoreSource {
+  // The project ID that the Cloud SQL source is in with a length limit of 128
+  // characters. If not specified, inherits the project ID from the parent
+  // request.
+  string project_id = 1;
+
+  // Required. The Firestore database to copy the data from with a length limit
+  // of 256 characters.
+  string database_id = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The Firestore collection to copy the data from with a length
+  // limit of 1,500 characters.
+  string collection_id = 3 [(google.api.field_behavior) = REQUIRED];
+
+  // Intermediate Cloud Storage directory used for the import with a length
+  // limit of 2,000 characters. Can be specified if one wants to have the
+  // Firestore export to a specific Cloud Storage directory.
+  //
+  // Please ensure that the Firestore service account has the necessary Cloud
+  // Storage Admin permissions to access the specified Cloud Storage directory.
+  string gcs_staging_dir = 4;
+}
+
 // Configuration of destination for Import related errors.
 message ImportErrorConfig {
   // Required. Errors destination.
@@ -220,6 +448,9 @@ message ImportDocumentsMetadata {
 
   // Count of entries that encountered errors while processing.
   int64 failure_count = 4;
+
+  // Total count of entries that were processed.
+  int64 total_count = 5;
 }
 
 // Request message for Import methods.
@@ -256,6 +487,21 @@ message ImportDocumentsRequest {
 
     // BigQuery input source.
     BigQuerySource bigquery_source = 4;
+
+    // FhirStore input source.
+    FhirStoreSource fhir_store_source = 10;
+
+    // Spanner input source.
+    SpannerSource spanner_source = 11;
+
+    // Cloud SQL input source.
+    CloudSqlSource cloud_sql_source = 12;
+
+    // Firestore input source.
+    FirestoreSource firestore_source = 13;
+
+    // Cloud Bigtable input source.
+    BigtableSource bigtable_source = 15;
   }
 
   // Required. The parent branch resource name, such as
@@ -276,6 +522,10 @@ message ImportDocumentsRequest {
   // [ReconciliationMode.INCREMENTAL][google.cloud.discoveryengine.v1alpha.ImportDocumentsRequest.ReconciliationMode.INCREMENTAL].
   ReconciliationMode reconciliation_mode = 6;
 
+  // Indicates which fields in the provided imported documents to update. If
+  // not set, the default is to update all fields.
+  google.protobuf.FieldMask update_mask = 7;
+
   // Whether to automatically generate IDs for the documents if absent.
   //
   // If set to `true`,
@@ -289,45 +539,54 @@ message ImportDocumentsRequest {
   // [id_field][google.cloud.discoveryengine.v1alpha.ImportDocumentsRequest.id_field],
   // otherwise, documents without IDs fail to be imported.
   //
-  // Only set this field when using
-  // [GcsSource][google.cloud.discoveryengine.v1alpha.GcsSource] or
-  // [BigQuerySource][google.cloud.discoveryengine.v1alpha.BigQuerySource], and
-  // when
+  // Supported data sources:
+  //
+  // * [GcsSource][google.cloud.discoveryengine.v1alpha.GcsSource].
   // [GcsSource.data_schema][google.cloud.discoveryengine.v1alpha.GcsSource.data_schema]
-  // or
+  // must be `custom` or `csv`. Otherwise, an INVALID_ARGUMENT error is thrown.
+  // * [BigQuerySource][google.cloud.discoveryengine.v1alpha.BigQuerySource].
   // [BigQuerySource.data_schema][google.cloud.discoveryengine.v1alpha.BigQuerySource.data_schema]
-  // is `custom` or `csv`. Otherwise, an INVALID_ARGUMENT error is thrown.
+  // must be `custom` or `csv`. Otherwise, an INVALID_ARGUMENT error is thrown.
+  // * [SpannerSource][google.cloud.discoveryengine.v1alpha.SpannerSource].
+  // * [CloudSqlSource][google.cloud.discoveryengine.v1alpha.CloudSqlSource].
+  // * [FirestoreSource][google.cloud.discoveryengine.v1alpha.FirestoreSource].
+  // * [BigtableSource][google.cloud.discoveryengine.v1alpha.BigtableSource].
   bool auto_generate_ids = 8;
 
-  // The field in the Cloud Storage and BigQuery sources that indicates the
-  // unique IDs of the documents.
+  // The field indicates the ID field or column to be used as unique IDs of
+  // the documents.
   //
   // For [GcsSource][google.cloud.discoveryengine.v1alpha.GcsSource] it is the
   // key of the JSON field. For instance, `my_id` for JSON `{"my_id":
-  // "some_uuid"}`. For
-  // [BigQuerySource][google.cloud.discoveryengine.v1alpha.BigQuerySource] it is
-  // the column name of the BigQuery table where the unique ids are stored.
+  // "some_uuid"}`. For others, it may be the column name of the table where the
+  // unique ids are stored.
   //
-  // The values of the JSON field or the BigQuery column are used as the
+  // The values of the JSON field or the table column are used as the
   // [Document.id][google.cloud.discoveryengine.v1alpha.Document.id]s. The JSON
-  // field or the BigQuery column must be of string type, and the values must be
+  // field or the table column must be of string type, and the values must be
   // set as valid strings conform to
   // [RFC-1034](https://tools.ietf.org/html/rfc1034) with 1-63 characters.
   // Otherwise, documents without valid IDs fail to be imported.
   //
-  // Only set this field when using
-  // [GcsSource][google.cloud.discoveryengine.v1alpha.GcsSource] or
-  // [BigQuerySource][google.cloud.discoveryengine.v1alpha.BigQuerySource], and
-  // when
-  // [GcsSource.data_schema][google.cloud.discoveryengine.v1alpha.GcsSource.data_schema]
-  // or
-  // [BigQuerySource.data_schema][google.cloud.discoveryengine.v1alpha.BigQuerySource.data_schema]
-  // is `custom`. And only set this field when
+  // Only set this field when
   // [auto_generate_ids][google.cloud.discoveryengine.v1alpha.ImportDocumentsRequest.auto_generate_ids]
   // is unset or set as `false`. Otherwise, an INVALID_ARGUMENT error is thrown.
   //
   // If it is unset, a default value `_id` is used when importing from the
   // allowed data sources.
+  //
+  // Supported data sources:
+  //
+  // * [GcsSource][google.cloud.discoveryengine.v1alpha.GcsSource].
+  // [GcsSource.data_schema][google.cloud.discoveryengine.v1alpha.GcsSource.data_schema]
+  // must be `custom` or `csv`. Otherwise, an INVALID_ARGUMENT error is thrown.
+  // * [BigQuerySource][google.cloud.discoveryengine.v1alpha.BigQuerySource].
+  // [BigQuerySource.data_schema][google.cloud.discoveryengine.v1alpha.BigQuerySource.data_schema]
+  // must be `custom` or `csv`. Otherwise, an INVALID_ARGUMENT error is thrown.
+  // * [SpannerSource][google.cloud.discoveryengine.v1alpha.SpannerSource].
+  // * [CloudSqlSource][google.cloud.discoveryengine.v1alpha.CloudSqlSource].
+  // * [FirestoreSource][google.cloud.discoveryengine.v1alpha.FirestoreSource].
+  // * [BigtableSource][google.cloud.discoveryengine.v1alpha.BigtableSource].
   string id_field = 9;
 }
 
@@ -405,3 +664,35 @@ message ImportSuggestionDenyListEntriesMetadata {
   // finish time.
   google.protobuf.Timestamp update_time = 2;
 }
+
+// Response of the
+// [CompletionService.ImportCompletionSuggestions][google.cloud.discoveryengine.v1alpha.CompletionService.ImportCompletionSuggestions]
+// method. If the long running operation is done, this message is returned by
+// the google.longrunning.Operations.response field if the operation is
+// successful.
+message ImportCompletionSuggestionsResponse {
+  // A sample of errors encountered while processing the request.
+  repeated google.rpc.Status error_samples = 1;
+
+  // Count of
+  // [CompletionSuggestion][google.cloud.discoveryengine.v1alpha.CompletionSuggestion]s
+  // successfully imported.
+  int64 success_count = 2;
+
+  // Count of
+  // [CompletionSuggestion][google.cloud.discoveryengine.v1alpha.CompletionSuggestion]s
+  // that failed to be imported.
+  int64 failure_count = 3;
+}
+
+// Metadata related to the progress of the ImportCompletionSuggestions
+// operation. This will be returned by the google.longrunning.Operation.metadata
+// field.
+message ImportCompletionSuggestionsMetadata {
+  // Operation create time.
+  google.protobuf.Timestamp create_time = 1;
+
+  // Operation last update time. If the operation is done, this is also the
+  // finish time.
+  google.protobuf.Timestamp update_time = 2;
+}
diff --git a/google/cloud/discoveryengine/v1alpha/rank_service.proto b/google/cloud/discoveryengine/v1alpha/rank_service.proto
new file mode 100644
index 0000000000000..b10073f2f38be
--- /dev/null
+++ b/google/cloud/discoveryengine/v1alpha/rank_service.proto
@@ -0,0 +1,115 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.cloud.discoveryengine.v1alpha;
+
+import "google/api/annotations.proto";
+import "google/api/client.proto";
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+
+option csharp_namespace = "Google.Cloud.DiscoveryEngine.V1Alpha";
+option go_package = "cloud.google.com/go/discoveryengine/apiv1alpha/discoveryenginepb;discoveryenginepb";
+option java_multiple_files = true;
+option java_outer_classname = "RankServiceProto";
+option java_package = "com.google.cloud.discoveryengine.v1alpha";
+option objc_class_prefix = "DISCOVERYENGINE";
+option php_namespace = "Google\\Cloud\\DiscoveryEngine\\V1alpha";
+option ruby_package = "Google::Cloud::DiscoveryEngine::V1alpha";
+
+// Service for ranking text records.
+service RankService {
+  option (google.api.default_host) = "discoveryengine.googleapis.com";
+  option (google.api.oauth_scopes) =
+      "https://www.googleapis.com/auth/cloud-platform";
+
+  // Ranks a list of text records based on the given input query.
+  rpc Rank(RankRequest) returns (RankResponse) {
+    option (google.api.http) = {
+      post: "/v1alpha/{ranking_config=projects/*/locations/*/rankingConfigs/*}:rank"
+      body: "*"
+    };
+  }
+}
+
+// Record message for
+// [RankService.Rank][google.cloud.discoveryengine.v1alpha.RankService.Rank]
+// method.
+message RankingRecord {
+  // The unique ID to represent the record.
+  string id = 1;
+
+  // The title of the record. Empty by default.
+  // At least one of
+  // [title][google.cloud.discoveryengine.v1alpha.RankingRecord.title] or
+  // [content][google.cloud.discoveryengine.v1alpha.RankingRecord.content]
+  // should be set otherwise an INVALID_ARGUMENT error is thrown.
+  string title = 2;
+
+  // The content of the record. Empty by default.
+  // At least one of
+  // [title][google.cloud.discoveryengine.v1alpha.RankingRecord.title] or
+  // [content][google.cloud.discoveryengine.v1alpha.RankingRecord.content]
+  // should be set otherwise an INVALID_ARGUMENT error is thrown.
+  string content = 3;
+
+  // The score of this record based on the given query and selected model.
+  float score = 4;
+}
+
+// Request message for
+// [RankService.Rank][google.cloud.discoveryengine.v1alpha.RankService.Rank]
+// method.
+message RankRequest {
+  // Required. The resource name of the rank service config, such as
+  // `projects/{project_num}/locations/{location_id}/rankingConfigs/default_ranking_config`.
+  string ranking_config = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "discoveryengine.googleapis.com/RankingConfig"
+    }
+  ];
+
+  // The identifier of the model to use. It is one of:
+  //
+  // * `semantic-ranker-512@latest`: Semantic ranking model with maxiumn input
+  // token size 512.
+  //
+  // It is set to `semantic-ranker-512@latest` by default if unspecified.
+  string model = 2;
+
+  // The number of results to return. If this is unset or no bigger than zero,
+  // returns all results.
+  int32 top_n = 3;
+
+  // The query to use.
+  string query = 4;
+
+  // Required. A list of records to rank. At most 200 records to rank.
+  repeated RankingRecord records = 5 [(google.api.field_behavior) = REQUIRED];
+
+  // If true, the response will contain only record ID and score. By default, it
+  // is false, the response will contain record details.
+  bool ignore_record_details_in_response = 6;
+}
+
+// Response message for
+// [RankService.Rank][google.cloud.discoveryengine.v1alpha.RankService.Rank]
+// method.
+message RankResponse {
+  // A list of records sorted by descending score.
+  repeated RankingRecord records = 5;
+}
diff --git a/google/cloud/discoveryengine/v1alpha/search_service.proto b/google/cloud/discoveryengine/v1alpha/search_service.proto
index 920a6ed82fdf1..047a21975058e 100644
--- a/google/cloud/discoveryengine/v1alpha/search_service.proto
+++ b/google/cloud/discoveryengine/v1alpha/search_service.proto
@@ -218,6 +218,80 @@ message SearchRequest {
   message BoostSpec {
     // Boost applies to documents which match a condition.
     message ConditionBoostSpec {
+      // Specification for custom ranking based on customer specified attribute
+      // value. It provides more controls for customized ranking than the simple
+      // (condition, boost) combination above.
+      message BoostControlSpec {
+        // The control points used to define the curve. The curve defined
+        // through these control points can only be monotonically increasing
+        // or decreasing(constant values are acceptable).
+        message ControlPoint {
+          // Can be one of:
+          // 1. The numerical field value.
+          // 2. The duration spec for freshness:
+          // The value must be formatted as an XSD `dayTimeDuration` value (a
+          // restricted subset of an ISO 8601 duration value). The pattern for
+          // this is: `[nD][T[nH][nM][nS]]`.
+          string attribute_value = 1;
+
+          // The value between -1 to 1 by which to boost the score if the
+          // attribute_value evaluates to the value specified above.
+          float boost_amount = 2;
+        }
+
+        // The attribute(or function) for which the custom ranking is to be
+        // applied.
+        enum AttributeType {
+          // Unspecified AttributeType.
+          ATTRIBUTE_TYPE_UNSPECIFIED = 0;
+
+          // The value of the numerical field will be used to dynamically update
+          // the boost amount. In this case, the attribute_value (the x value)
+          // of the control point will be the actual value of the numerical
+          // field for which the boost_amount is specified.
+          NUMERICAL = 1;
+
+          // For the freshness use case the attribute value will be the duration
+          // between the current time and the date in the datetime field
+          // specified. The value must be formatted as an XSD `dayTimeDuration`
+          // value (a restricted subset of an ISO 8601 duration value). The
+          // pattern for this is: `[nD][T[nH][nM][nS]]`.
+          // E.g. `5D`, `3DT12H30M`, `T24H`.
+          FRESHNESS = 2;
+        }
+
+        // The interpolation type to be applied. Default will be linear
+        // (Piecewise Linear).
+        enum InterpolationType {
+          // Interpolation type is unspecified. In this case, it defaults to
+          // Linear.
+          INTERPOLATION_TYPE_UNSPECIFIED = 0;
+
+          // Piecewise linear interpolation will be applied.
+          LINEAR = 1;
+        }
+
+        // The name of the field whose value will be used to determine the
+        // boost amount.
+        string field_name = 1;
+
+        // The attribute type to be used to determine the boost amount. The
+        // attribute value can be derived from the field value of the specified
+        // field_name. In the case of numerical it is straightforward i.e.
+        // attribute_value = numerical_field_value. In the case of freshness
+        // however, attribute_value = (time.now() - datetime_field_value).
+        AttributeType attribute_type = 2;
+
+        // The interpolation type to be applied to connect the control points
+        // listed below.
+        InterpolationType interpolation_type = 3;
+
+        // The control points used to define the curve. The monotonic function
+        // (defined through the interpolation_type above) passes through the
+        // control points listed here.
+        repeated ControlPoint control_points = 4;
+      }
+
       // An expression which specifies a boost condition. The syntax and
       // supported fields are the same as a filter expression. See
       // [SearchRequest.filter][google.cloud.discoveryengine.v1alpha.SearchRequest.filter]
@@ -233,21 +307,27 @@ message SearchRequest {
       // Strength of the condition boost, which should be in [-1, 1]. Negative
       // boost means demotion. Default is 0.0.
       //
-      // Setting to 1.0 gives the document a big promotion. However, it does not
-      // necessarily mean that the boosted document will be the top result at
-      // all times, nor that other documents will be excluded. Results could
-      // still be shown even when none of them matches the condition. And
-      // results that are significantly more relevant to the search query can
-      // still trump your heavily favored but irrelevant documents.
+      // Setting to 1.0 gives the document a big promotion. However, it does
+      // not necessarily mean that the boosted document will be the top result
+      // at all times, nor that other documents will be excluded. Results
+      // could still be shown even when none of them matches the condition.
+      // And results that are significantly more relevant to the search query
+      // can still trump your heavily favored but irrelevant documents.
       //
       // Setting to -1.0 gives the document a big demotion. However, results
       // that are deeply relevant might still be shown. The document will have
-      // an upstream battle to get a fairly high ranking, but it is not blocked
-      // out completely.
+      // an upstream battle to get a fairly high ranking, but it is not
+      // blocked out completely.
       //
       // Setting to 0.0 means no boost applied. The boosting condition is
-      // ignored.
+      // ignored. Only one of the (condition, boost) combination or the
+      // boost_control_spec below are set. If both are set then the global boost
+      // is ignored and the more fine-grained boost_control_spec is applied.
       float boost = 2;
+
+      // Complex specification for custom ranking based on customer defined
+      // attribute value.
+      BoostControlSpec boost_control_spec = 3;
     }
 
     // Condition boost specifications. If a document matches multiple conditions
@@ -348,11 +428,13 @@ message SearchRequest {
         // Supported values are:
         //
         // * `stable`: string. Default value when no value is specified. Uses a
-        //   generally available, fine-tuned version of the text-bison@001
-        //   model.
-        // * `preview`: string. (Public preview) Uses a fine-tuned version of
-        //   the text-bison@002 model. This model works only for summaries in
-        //   English.
+        //    generally available, fine-tuned model. For more information, see
+        //    [Answer generation model versions and
+        //    lifecycle](https://cloud.google.com/generative-ai-app-builder/docs/answer-generation-models).
+        // * `preview`: string. (Public preview) Uses a preview model. For more
+        //    information, see
+        //    [Answer generation model versions and
+        //    lifecycle](https://cloud.google.com/generative-ai-app-builder/docs/answer-generation-models).
         string version = 1;
       }
 
@@ -419,6 +501,14 @@ message SearchRequest {
       // If specified, the spec will be used to modify the model specification
       // provided to the LLM.
       ModelSpec model_spec = 7;
+
+      // If true, answer will be generated from most relevant chunks from top
+      // search results. This feature will improve summary quality.
+      // Please note that with this feature enabled, not all top search results
+      // will be referenced and included in the reference list, so the citation
+      // source index only points to the search results listed in the reference
+      // list.
+      bool use_semantic_chunks = 8;
     }
 
     // A specification for configuring the extractive content in a search
@@ -459,10 +549,9 @@ message SearchRequest {
       int32 max_extractive_segment_count = 2;
 
       // Specifies whether to return the confidence score from the extractive
-      // segments in each search result. The default value is `false`.
-      //
-      // Note: this is a priavte preview feature and only works for allowlisted
-      // users, please reach out to Cloud Support team if you want to use it.
+      // segments in each search result. This feature is available only for new
+      // or allowlisted data stores. To allowlist your data store, please
+      // contact your Customer Engineer. The default value is `false`.
       bool return_extractive_segment_score = 3;
 
       // Specifies whether to also include the adjacent from each selected
@@ -476,6 +565,23 @@ message SearchRequest {
       int32 num_next_segments = 5;
     }
 
+    // Specifies the chunk spec to be returned from the search response.
+    // Only available if the
+    // [SearchRequest.ContentSearchSpec.search_result_mode][google.cloud.discoveryengine.v1alpha.SearchRequest.ContentSearchSpec.search_result_mode]
+    // is set to
+    // [CHUNKS][google.cloud.discoveryengine.v1alpha.SearchRequest.ContentSearchSpec.SearchResultMode.CHUNKS]
+    message ChunkSpec {
+      // The number of previous chunks to be returned of the current chunk. The
+      // maximum allowed value is 3.
+      // If not specified, no previous chunks will be returned.
+      int32 num_previous_chunks = 1;
+
+      // The number of next chunks to be returned of the current chunk. The
+      // maximum allowed value is 3.
+      // If not specified, no next chunks will be returned.
+      int32 num_next_chunks = 2;
+    }
+
     // Specifies the search result mode. If unspecified, the
     // search result mode is based on
     // [DataStore.DocumentProcessingConfig.chunking_config][]:
@@ -513,6 +619,13 @@ message SearchRequest {
     //   it defaults to `CHUNKS`.
     // * Otherwise, it defaults to `DOCUMENTS`.
     SearchResultMode search_result_mode = 4;
+
+    // Specifies the chunk spec to be returned from the search response.
+    // Only available if the
+    // [SearchRequest.ContentSearchSpec.search_result_mode][google.cloud.discoveryengine.v1alpha.SearchRequest.ContentSearchSpec.search_result_mode]
+    // is set to
+    // [CHUNKS][google.cloud.discoveryengine.v1alpha.SearchRequest.ContentSearchSpec.SearchResultMode.CHUNKS]
+    ChunkSpec chunk_spec = 5;
   }
 
   // The specification that uses customized query embedding vector to do
@@ -560,11 +673,15 @@ message SearchRequest {
   ImageQuery image_query = 19;
 
   // Maximum number of
-  // [Document][google.cloud.discoveryengine.v1alpha.Document]s to return. If
-  // unspecified, defaults to a reasonable value. The maximum allowed value is
-  // 100. Values above 100 are coerced to 100.
+  // [Document][google.cloud.discoveryengine.v1alpha.Document]s to return. The
+  // maximum allowed value depends on the data type. Values above the maximum
+  // value are coerced to the maximum value.
   //
-  // If this field is negative, an  `INVALID_ARGUMENT`  is returned.
+  // * Websites with basic indexing: Default `10`, Maximum `25`.
+  // * Websites with advanced indexing: Default `25`, Maximum `50`.
+  // * Other: Default `50`, Maximum `100`.
+  //
+  // If this field is negative, an  `INVALID_ARGUMENT` is returned.
   int32 page_size = 4;
 
   // A page token received from a previous
@@ -701,7 +818,8 @@ message SearchRequest {
   //
   // If
   // [SearchRequest.EmbeddingSpec.EmbeddingVector.field_path][google.cloud.discoveryengine.v1alpha.SearchRequest.EmbeddingSpec.EmbeddingVector.field_path]
-  // is not provided, it will use [ServingConfig.EmbeddingConfig.field_path][].
+  // is not provided, it will use
+  // [ServingConfig.EmbeddingConfig.field_path][google.cloud.discoveryengine.v1alpha.ServingConfig.embedding_config].
   EmbeddingSpec embedding_spec = 23;
 
   // The ranking expression controls the customized ranking on retrieval
@@ -867,6 +985,15 @@ message SearchResponse {
 
     // Document reference.
     message Reference {
+      // Chunk content.
+      message ChunkContent {
+        // Chunk textual content.
+        string content = 1;
+
+        // Page identifier.
+        string page_identifier = 2;
+      }
+
       // Title of the document.
       string title = 1;
 
@@ -884,6 +1011,9 @@ message SearchResponse {
 
       // Cloud Storage or HTTP uri for the document.
       string uri = 3;
+
+      // List of cited chunk contents derived from document content.
+      repeated ChunkContent chunk_contents = 4;
     }
 
     // Summary with metadata information.
diff --git a/google/cloud/discoveryengine/v1alpha/search_tuning_service.proto b/google/cloud/discoveryengine/v1alpha/search_tuning_service.proto
index 334edae3e3879..92d0479a9b907 100644
--- a/google/cloud/discoveryengine/v1alpha/search_tuning_service.proto
+++ b/google/cloud/discoveryengine/v1alpha/search_tuning_service.proto
@@ -65,8 +65,8 @@ message TrainCustomModelRequest {
     // A newline delimited jsonl/ndjson file.
     //
     // For search-tuning model, each line should have the _id, title
-    // and text. Example: {"_id": "doc1", title: "relevant doc", "text":
-    // "relevant text"}
+    // and text. Example:
+    // `{"_id": "doc1", title: "relevant doc", "text": "relevant text"}`
     string corpus_data_path = 1;
 
     // The gcs query data which could be associated in train data.
@@ -137,6 +137,9 @@ message TrainCustomModelResponse {
   //  * **in-progress**: Model training is in progress.
   //  * **ready**: The model is ready for serving.
   string model_status = 3;
+
+  // The metrics of the trained model.
+  map<string, double> metrics = 4;
 }
 
 // Metadata related to the progress of the TrainCustomModel operation. This is
diff --git a/google/cloud/discoveryengine/v1alpha/serving_config_service.proto b/google/cloud/discoveryengine/v1alpha/serving_config_service.proto
index 22fd94fd53116..0cba972b1e673 100644
--- a/google/cloud/discoveryengine/v1alpha/serving_config_service.proto
+++ b/google/cloud/discoveryengine/v1alpha/serving_config_service.proto
@@ -32,7 +32,8 @@ option objc_class_prefix = "DISCOVERYENGINE";
 option php_namespace = "Google\\Cloud\\DiscoveryEngine\\V1alpha";
 option ruby_package = "Google::Cloud::DiscoveryEngine::V1alpha";
 
-// Service for operations related to [ServingConfig][].
+// Service for operations related to
+// [ServingConfig][google.cloud.discoveryengine.v1alpha.ServingConfig].
 service ServingConfigService {
   option (google.api.default_host) = "discoveryengine.googleapis.com";
   option (google.api.oauth_scopes) =