diff --git a/google/privacy/dlp/v2/dlp.proto b/google/privacy/dlp/v2/dlp.proto
index d590a82c..4b151b3e 100644
--- a/google/privacy/dlp/v2/dlp.proto
+++ b/google/privacy/dlp/v2/dlp.proto
@@ -41,11 +41,19 @@ option php_namespace = "Google\\Cloud\\Dlp\\V2";
 // blocks or images.
 // The service also includes methods for sensitive data redaction and
 // scheduling of data scans on Google Cloud Platform based data sets.
+//
+// To learn more about concepts and find how-to guides see
+// https://cloud.google.com/dlp/docs/.
 service DlpService {
   // Finds potentially sensitive info in content.
   // This method has limits on input size, processing time, and output size.
-  // [How-to guide for text](/dlp/docs/inspecting-text), [How-to guide for
-  // images](/dlp/docs/inspecting-images)
+  //
+  // When no InfoTypes or CustomInfoTypes are specified in this request, the
+  // system will automatically choose what detectors to run. By default this may
+  // be all types, but may change over time as detectors are updated.
+  //
+  // For how to guides, see https://cloud.google.com/dlp/docs/inspecting-images
+  // and https://cloud.google.com/dlp/docs/inspecting-text,
   rpc InspectContent(InspectContentRequest) returns (InspectContentResponse) {
     option (google.api.http) = {
       post: "/v2/{parent=projects/*}/content:inspect"
@@ -55,7 +63,12 @@ service DlpService {
 
   // Redacts potentially sensitive info from an image.
   // This method has limits on input size, processing time, and output size.
-  // [How-to guide](/dlp/docs/redacting-sensitive-data-images)
+  // See https://cloud.google.com/dlp/docs/redacting-sensitive-data-images to
+  // learn more.
+  //
+  // When no InfoTypes or CustomInfoTypes are specified in this request, the
+  // system will automatically choose what detectors to run. By default this may
+  // be all types, but may change over time as detectors are updated.
   rpc RedactImage(RedactImageRequest) returns (RedactImageResponse) {
     option (google.api.http) = {
       post: "/v2/{parent=projects/*}/image:redact"
@@ -65,7 +78,12 @@ service DlpService {
 
   // De-identifies potentially sensitive info from a ContentItem.
   // This method has limits on input size and output size.
-  // [How-to guide](/dlp/docs/deidentify-sensitive-data)
+  // See https://cloud.google.com/dlp/docs/deidentify-sensitive-data to
+  // learn more.
+  //
+  // When no InfoTypes or CustomInfoTypes are specified in this request, the
+  // system will automatically choose what detectors to run. By default this may
+  // be all types, but may change over time as detectors are updated.
   rpc DeidentifyContent(DeidentifyContentRequest) returns (DeidentifyContentResponse) {
     option (google.api.http) = {
       post: "/v2/{parent=projects/*}/content:deidentify"
@@ -74,6 +92,9 @@ service DlpService {
   }
 
   // Re-identifies content that has been de-identified.
+  // See
+  // https://cloud.google.com/dlp/docs/pseudonymization#re-identification_in_free_text_code_example
+  // to learn more.
   rpc ReidentifyContent(ReidentifyContentRequest) returns (ReidentifyContentResponse) {
     option (google.api.http) = {
       post: "/v2/{parent=projects/*}/content:reidentify"
@@ -82,8 +103,8 @@ service DlpService {
   }
 
   // Returns a list of the sensitive information types that the DLP API
-  // supports. For more information, see [Listing supported predefined
-  // infoTypes](/dlp/docs/listing-infotypes).
+  // supports. See https://cloud.google.com/dlp/docs/infotypes-reference to
+  // learn more.
   rpc ListInfoTypes(ListInfoTypesRequest) returns (ListInfoTypesResponse) {
     option (google.api.http) = {
       get: "/v2/infoTypes"
@@ -92,6 +113,7 @@ service DlpService {
 
   // Creates an InspectTemplate for re-using frequently used configuration
   // for inspecting content, images, and storage.
+  // See https://cloud.google.com/dlp/docs/creating-templates to learn more.
   rpc CreateInspectTemplate(CreateInspectTemplateRequest) returns (InspectTemplate) {
     option (google.api.http) = {
       post: "/v2/{parent=organizations/*}/inspectTemplates"
@@ -104,6 +126,7 @@ service DlpService {
   }
 
   // Updates the InspectTemplate.
+  // See https://cloud.google.com/dlp/docs/creating-templates to learn more.
   rpc UpdateInspectTemplate(UpdateInspectTemplateRequest) returns (InspectTemplate) {
     option (google.api.http) = {
       patch: "/v2/{name=organizations/*/inspectTemplates/*}"
@@ -116,6 +139,7 @@ service DlpService {
   }
 
   // Gets an InspectTemplate.
+  // See https://cloud.google.com/dlp/docs/creating-templates to learn more.
   rpc GetInspectTemplate(GetInspectTemplateRequest) returns (InspectTemplate) {
     option (google.api.http) = {
       get: "/v2/{name=organizations/*/inspectTemplates/*}"
@@ -126,6 +150,7 @@ service DlpService {
   }
 
   // Lists InspectTemplates.
+  // See https://cloud.google.com/dlp/docs/creating-templates to learn more.
   rpc ListInspectTemplates(ListInspectTemplatesRequest) returns (ListInspectTemplatesResponse) {
     option (google.api.http) = {
       get: "/v2/{parent=organizations/*}/inspectTemplates"
@@ -136,6 +161,7 @@ service DlpService {
   }
 
   // Deletes an InspectTemplate.
+  // See https://cloud.google.com/dlp/docs/creating-templates to learn more.
   rpc DeleteInspectTemplate(DeleteInspectTemplateRequest) returns (google.protobuf.Empty) {
     option (google.api.http) = {
       delete: "/v2/{name=organizations/*/inspectTemplates/*}"
@@ -147,6 +173,8 @@ service DlpService {
 
   // Creates a DeidentifyTemplate for re-using frequently used configuration
   // for de-identifying content, images, and storage.
+  // See https://cloud.google.com/dlp/docs/creating-templates-deid to learn
+  // more.
   rpc CreateDeidentifyTemplate(CreateDeidentifyTemplateRequest) returns (DeidentifyTemplate) {
     option (google.api.http) = {
       post: "/v2/{parent=organizations/*}/deidentifyTemplates"
@@ -159,6 +187,8 @@ service DlpService {
   }
 
   // Updates the DeidentifyTemplate.
+  // See https://cloud.google.com/dlp/docs/creating-templates-deid to learn
+  // more.
   rpc UpdateDeidentifyTemplate(UpdateDeidentifyTemplateRequest) returns (DeidentifyTemplate) {
     option (google.api.http) = {
       patch: "/v2/{name=organizations/*/deidentifyTemplates/*}"
@@ -171,6 +201,8 @@ service DlpService {
   }
 
   // Gets a DeidentifyTemplate.
+  // See https://cloud.google.com/dlp/docs/creating-templates-deid to learn
+  // more.
   rpc GetDeidentifyTemplate(GetDeidentifyTemplateRequest) returns (DeidentifyTemplate) {
     option (google.api.http) = {
       get: "/v2/{name=organizations/*/deidentifyTemplates/*}"
@@ -181,6 +213,8 @@ service DlpService {
   }
 
   // Lists DeidentifyTemplates.
+  // See https://cloud.google.com/dlp/docs/creating-templates-deid to learn
+  // more.
   rpc ListDeidentifyTemplates(ListDeidentifyTemplatesRequest) returns (ListDeidentifyTemplatesResponse) {
     option (google.api.http) = {
       get: "/v2/{parent=organizations/*}/deidentifyTemplates"
@@ -191,6 +225,8 @@ service DlpService {
   }
 
   // Deletes a DeidentifyTemplate.
+  // See https://cloud.google.com/dlp/docs/creating-templates-deid to learn
+  // more.
   rpc DeleteDeidentifyTemplate(DeleteDeidentifyTemplateRequest) returns (google.protobuf.Empty) {
     option (google.api.http) = {
       delete: "/v2/{name=organizations/*/deidentifyTemplates/*}"
@@ -202,6 +238,7 @@ service DlpService {
 
   // Creates a job trigger to run DLP actions such as scanning storage for
   // sensitive information on a set schedule.
+  // See https://cloud.google.com/dlp/docs/creating-job-triggers to learn more.
   rpc CreateJobTrigger(CreateJobTriggerRequest) returns (JobTrigger) {
     option (google.api.http) = {
       post: "/v2/{parent=projects/*}/jobTriggers"
@@ -210,6 +247,7 @@ service DlpService {
   }
 
   // Updates a job trigger.
+  // See https://cloud.google.com/dlp/docs/creating-job-triggers to learn more.
   rpc UpdateJobTrigger(UpdateJobTriggerRequest) returns (JobTrigger) {
     option (google.api.http) = {
       patch: "/v2/{name=projects/*/jobTriggers/*}"
@@ -218,6 +256,7 @@ service DlpService {
   }
 
   // Gets a job trigger.
+  // See https://cloud.google.com/dlp/docs/creating-job-triggers to learn more.
   rpc GetJobTrigger(GetJobTriggerRequest) returns (JobTrigger) {
     option (google.api.http) = {
       get: "/v2/{name=projects/*/jobTriggers/*}"
@@ -225,6 +264,7 @@ service DlpService {
   }
 
   // Lists job triggers.
+  // See https://cloud.google.com/dlp/docs/creating-job-triggers to learn more.
   rpc ListJobTriggers(ListJobTriggersRequest) returns (ListJobTriggersResponse) {
     option (google.api.http) = {
       get: "/v2/{parent=projects/*}/jobTriggers"
@@ -232,6 +272,7 @@ service DlpService {
   }
 
   // Deletes a job trigger.
+  // See https://cloud.google.com/dlp/docs/creating-job-triggers to learn more.
   rpc DeleteJobTrigger(DeleteJobTriggerRequest) returns (google.protobuf.Empty) {
     option (google.api.http) = {
       delete: "/v2/{name=projects/*/jobTriggers/*}"
@@ -239,7 +280,12 @@ service DlpService {
   }
 
   // Creates a new job to inspect storage or calculate risk metrics.
-  // [How-to guide](/dlp/docs/compute-risk-analysis).
+  // See https://cloud.google.com/dlp/docs/inspecting-storage and
+  // https://cloud.google.com/dlp/docs/compute-risk-analysis to learn more.
+  //
+  // When no InfoTypes or CustomInfoTypes are specified in inspect jobs, the
+  // system will automatically choose what detectors to run. By default this may
+  // be all types, but may change over time as detectors are updated.
   rpc CreateDlpJob(CreateDlpJobRequest) returns (DlpJob) {
     option (google.api.http) = {
       post: "/v2/{parent=projects/*}/dlpJobs"
@@ -248,6 +294,8 @@ service DlpService {
   }
 
   // Lists DlpJobs that match the specified filter in the request.
+  // See https://cloud.google.com/dlp/docs/inspecting-storage and
+  // https://cloud.google.com/dlp/docs/compute-risk-analysis to learn more.
   rpc ListDlpJobs(ListDlpJobsRequest) returns (ListDlpJobsResponse) {
     option (google.api.http) = {
       get: "/v2/{parent=projects/*}/dlpJobs"
@@ -255,6 +303,8 @@ service DlpService {
   }
 
   // Gets the latest state of a long-running DlpJob.
+  // See https://cloud.google.com/dlp/docs/inspecting-storage and
+  // https://cloud.google.com/dlp/docs/compute-risk-analysis to learn more.
   rpc GetDlpJob(GetDlpJobRequest) returns (DlpJob) {
     option (google.api.http) = {
       get: "/v2/{name=projects/*/dlpJobs/*}"
@@ -264,6 +314,8 @@ service DlpService {
   // Deletes a long-running DlpJob. This method indicates that the client is
   // no longer interested in the DlpJob result. The job will be cancelled if
   // possible.
+  // See https://cloud.google.com/dlp/docs/inspecting-storage and
+  // https://cloud.google.com/dlp/docs/compute-risk-analysis to learn more.
   rpc DeleteDlpJob(DeleteDlpJobRequest) returns (google.protobuf.Empty) {
     option (google.api.http) = {
       delete: "/v2/{name=projects/*/dlpJobs/*}"
@@ -273,6 +325,8 @@ service DlpService {
   // Starts asynchronous cancellation on a long-running DlpJob. The server
   // makes a best effort to cancel the DlpJob, but success is not
   // guaranteed.
+  // See https://cloud.google.com/dlp/docs/inspecting-storage and
+  // https://cloud.google.com/dlp/docs/compute-risk-analysis to learn more.
   rpc CancelDlpJob(CancelDlpJobRequest) returns (google.protobuf.Empty) {
     option (google.api.http) = {
       post: "/v2/{name=projects/*/dlpJobs/*}:cancel"
@@ -315,11 +369,17 @@ message InspectConfig {
   }
 
   // Restricts what info_types to look for. The values must correspond to
-  // InfoType values returned by ListInfoTypes or found in documentation.
+  // InfoType values returned by ListInfoTypes or listed at
+  // https://cloud.google.com/dlp/docs/infotypes-reference.
+  //
+  // When no InfoTypes or CustomInfoTypes are specified in a request, the
+  // system may automatically choose what detectors to run. By default this may
+  // be all types, but may change over time as detectors are updated.
   repeated InfoType info_types = 1;
 
   // Only returns findings equal or above this threshold. The default is
   // POSSIBLE.
+  // See https://cloud.google.com/dlp/docs/likelihood to learn more.
   Likelihood min_likelihood = 2;
 
   FindingLimits limits = 3;
@@ -331,7 +391,8 @@ message InspectConfig {
   // When true, excludes type information of the findings.
   bool exclude_info_types = 5;
 
-  // Custom infoTypes provided by the user.
+  // CustomInfoTypes provided by the user. See
+  // https://cloud.google.com/dlp/docs/creating-custom-infotypes to learn more.
   repeated CustomInfoType custom_info_types = 6;
 
   // List of options defining data content to scan.
@@ -371,7 +432,9 @@ message ContentItem {
     // String data to inspect or redact.
     string value = 3;
 
-    // Structured content for inspection.
+    // Structured content for inspection. See
+    // https://cloud.google.com/dlp/docs/inspecting-text#inspecting_a_table to
+    // learn more.
     Table table = 4;
 
     // Content data to inspect or redact. Replaces `type` and `data`.
@@ -380,6 +443,8 @@ message ContentItem {
 }
 
 // Structured content to inspect. Up to 50,000 `Value`s per request allowed.
+// See https://cloud.google.com/dlp/docs/inspecting-text#inspecting_a_table to
+// learn more.
 message Table {
   message Row {
     repeated Value values = 1;
@@ -408,16 +473,16 @@ message InspectResult {
 message Finding {
   // The content that was found. Even if the content is not textual, it
   // may be converted to a textual representation here.
-  // Provided if requested by the `InspectConfig` and the finding is
+  // Provided if `include_quote` is true and the finding is
   // less than or equal to 4096 bytes long. If the finding exceeds 4096 bytes
   // in length, the quote may be omitted.
   string quote = 1;
 
   // The type of content that might have been found.
-  // Provided if requested by the `InspectConfig`.
+  // Provided if `excluded_types` is false.
   InfoType info_type = 2;
 
-  // Estimate of how likely it is that the `info_type` is correct.
+  // Confidence of how likely it is that the `info_type` is correct.
   Likelihood likelihood = 3;
 
   // Where the content was found.
@@ -537,8 +602,8 @@ message BoundingBox {
   int32 height = 4;
 }
 
-// Request to search for potentially sensitive info in a list of items
-// and replace it with a default or provided content.
+// Request to search for potentially sensitive info in an image and redact it
+// by covering it with a colored rectangle.
 message RedactImageRequest {
   // Configuration for determining how redaction of images should occur.
   message ImageRedactionConfig {
@@ -551,7 +616,7 @@ message RedactImageRequest {
       InfoType info_type = 1;
 
       // If true, all text found in the image, regardless whether it matches an
-      // info_type, is redacted.
+      // info_type, is redacted. Only one should be provided.
       bool redact_all_text = 2;
     }
 
@@ -569,6 +634,10 @@ message RedactImageRequest {
   // The configuration for specifying what content to redact from images.
   repeated ImageRedactionConfig image_redaction_configs = 5;
 
+  // Whether the response should include findings along with the redacted
+  // image.
+  bool include_findings = 6;
+
   // The content must be PNG, JPEG, SVG or BMP.
   ByteContentItem byte_item = 7;
 }
@@ -594,6 +663,9 @@ message RedactImageResponse {
   // set to true, then this field will include all text, if any, that was found
   // in the image.
   string extracted_text = 2;
+
+  // The findings. Populated when include_findings in the request is true.
+  InspectResult inspect_result = 3;
 }
 
 // Request to de-identify a list of items.
@@ -736,18 +808,27 @@ message OutputStorageConfig {
 
   oneof type {
     // Store findings in an existing table or a new table in an existing
-    // dataset. Each column in an existing table must have the same name, type,
-    // and mode of a field in the `Finding` object. If table_id is not set a new
-    // one will be generated for you with the following format:
+    // dataset. If table_id is not set a new one will be generated
+    // for you with the following format:
     // dlp_googleapis_yyyy_mm_dd_[dlp_job_id]. Pacific timezone will be used for
     // generating the date details.
+    //
+    // For Inspect, each column in an existing output table must have the same
+    // name, type, and mode of a field in the `Finding` object.
+    //
+    // For Risk, an existing output table should be the output of a previous
+    // Risk analysis job run on the same source table, with the same privacy
+    // metric and quasi-identifiers. Risk jobs that analyze the same table but
+    // compute a different privacy metric, or use different sets of
+    // quasi-identifiers, cannot store their results in the same table.
     BigQueryTable table = 1;
   }
 
-  // Schema used for writing the findings. Columns are derived from the
-  // `Finding` object. If appending to an existing table, any columns from the
-  // predefined schema that are missing will be added. No columns in the
-  // existing table will be deleted.
+  // Schema used for writing the findings for Inspect jobs. This field is only
+  // used for Inspect and must be unspecified for Risk jobs. Columns are derived
+  // from the `Finding` object. If appending to an existing table, any columns
+  // from the predefined schema that are missing will be added. No columns in
+  // the existing table will be deleted.
   //
   // If unspecified, then all available columns will be used for a new table,
   // and no changes will be made to an existing table.
@@ -822,7 +903,8 @@ message ListInfoTypesResponse {
   repeated InfoTypeDescription info_types = 1;
 }
 
-// Configuration for a risk analysis job.
+// Configuration for a risk analysis job. See
+// https://cloud.google.com/dlp/docs/concepts-risk-analysis to learn more.
 message RiskAnalysisJobConfig {
   // Privacy metric to compute.
   PrivacyMetric privacy_metric = 1;
@@ -835,6 +917,61 @@ message RiskAnalysisJobConfig {
   repeated Action actions = 3;
 }
 
+// A column with a semantic tag attached.
+message QuasiId {
+  // Identifies the column. [required]
+  FieldId field = 1;
+
+  // Semantic tag that identifies what a column contains, to determine which
+  // statistical model to use to estimate the reidentifiability of each
+  // value. [required]
+  oneof tag {
+    // A column can be tagged with a InfoType to use the relevant public
+    // dataset as a statistical model of population, if available. We
+    // currently support US ZIP codes, region codes, ages and genders.
+    // To programmatically obtain the list of supported InfoTypes, use
+    // ListInfoTypes with the supported_by=RISK_ANALYSIS filter.
+    InfoType info_type = 2;
+
+    // A column can be tagged with a custom tag. In this case, the user must
+    // indicate an auxiliary table that contains statistical information on
+    // the possible values of this column (below).
+    string custom_tag = 3;
+
+    // If no semantic tag is indicated, we infer the statistical model from
+    // the distribution of values in the input data
+    google.protobuf.Empty inferred = 4;
+  }
+}
+
+// An auxiliary table containing statistical information on the relative
+// frequency of different quasi-identifiers values. It has one or several
+// quasi-identifiers columns, and one column that indicates the relative
+// frequency of each quasi-identifier tuple.
+// If a tuple is present in the data but not in the auxiliary table, the
+// corresponding relative frequency is assumed to be zero (and thus, the
+// tuple is highly reidentifiable).
+message StatisticalTable {
+  // A quasi-identifier column has a custom_tag, used to know which column
+  // in the data corresponds to which column in the statistical model.
+  message QuasiIdentifierField {
+    FieldId field = 1;
+
+    string custom_tag = 2;
+  }
+
+  // Auxiliary table location. [required]
+  BigQueryTable table = 3;
+
+  // Quasi-identifier columns. [required]
+  repeated QuasiIdentifierField quasi_ids = 1;
+
+  // The relative frequency column must contain a floating-point number
+  // between 0 and 1 (inclusive). Null values are assumed to be zero.
+  // [required]
+  FieldId relative_frequency = 2;
+}
+
 // Privacy metric to compute for reidentification risk analysis.
 message PrivacyMetric {
   // Compute numerical stats over an individual column, including
@@ -965,6 +1102,26 @@ message PrivacyMetric {
     repeated AuxiliaryTable auxiliary_tables = 3;
   }
 
+  // δ-presence metric, used to estimate how likely it is for an attacker to
+  // figure out that one given individual appears in a de-identified dataset.
+  // Similarly to the k-map metric, we cannot compute δ-presence exactly without
+  // knowing the attack dataset, so we use a statistical model instead.
+  message DeltaPresenceEstimationConfig {
+    // Fields considered to be quasi-identifiers. No two fields can have the
+    // same tag. [required]
+    repeated QuasiId quasi_ids = 1;
+
+    // ISO 3166-1 alpha-2 region code to use in the statistical modeling.
+    // Required if no column is tagged with a region-specific InfoType (like
+    // US_ZIP_5) or a region code.
+    string region_code = 2;
+
+    // Several auxiliary tables can be used in the analysis. Each custom_tag
+    // used to tag a quasi-identifiers field must appear in exactly one
+    // field of one auxiliary table.
+    repeated StatisticalTable auxiliary_tables = 3;
+  }
+
   oneof type {
     NumericalStatsConfig numerical_stats_config = 1;
 
@@ -975,6 +1132,8 @@ message PrivacyMetric {
     LDiversityConfig l_diversity_config = 4;
 
     KMapEstimationConfig k_map_estimation_config = 5;
+
+    DeltaPresenceEstimationConfig delta_presence_estimation_config = 6;
   }
 }
 
@@ -1144,6 +1303,63 @@ message AnalyzeDataSourceRiskDetails {
     repeated KMapEstimationHistogramBucket k_map_estimation_histogram = 1;
   }
 
+  // Result of the δ-presence computation. Note that these results are an
+  // estimation, not exact values.
+  message DeltaPresenceEstimationResult {
+    // A tuple of values for the quasi-identifier columns.
+    message DeltaPresenceEstimationQuasiIdValues {
+      // The quasi-identifier values.
+      repeated Value quasi_ids_values = 1;
+
+      // The estimated probability that a given individual sharing these
+      // quasi-identifier values is in the dataset. This value, typically called
+      // δ, is the ratio between the number of records in the dataset with these
+      // quasi-identifier values, and the total number of individuals (inside
+      // *and* outside the dataset) with these quasi-identifier values.
+      // For example, if there are 15 individuals in the dataset who share the
+      // same quasi-identifier values, and an estimated 100 people in the entire
+      // population with these values, then δ is 0.15.
+      double estimated_probability = 2;
+    }
+
+    // A DeltaPresenceEstimationHistogramBucket message with the following
+    // values:
+    //   min_probability: 0.1
+    //   max_probability: 0.2
+    //   frequency: 42
+    // means that there are 42 records for which δ is in [0.1, 0.2). An
+    // important particular case is when min_probability = max_probability = 1:
+    // then, every individual who shares this quasi-identifier combination is in
+    // the dataset.
+    message DeltaPresenceEstimationHistogramBucket {
+      // Between 0 and 1.
+      double min_probability = 1;
+
+      // Always greater than or equal to min_probability.
+      double max_probability = 2;
+
+      // Number of records within these probability bounds.
+      int64 bucket_size = 5;
+
+      // Sample of quasi-identifier tuple values in this bucket. The total
+      // number of classes returned per bucket is capped at 20.
+      repeated DeltaPresenceEstimationQuasiIdValues bucket_values = 6;
+
+      // Total number of distinct quasi-identifier tuple values in this bucket.
+      int64 bucket_value_count = 7;
+    }
+
+    // The intervals [min_probability, max_probability) do not overlap. If a
+    // value doesn't correspond to any such interval, the associated frequency
+    // is zero. For example, the following records:
+    //   {min_probability: 0, max_probability: 0.1, frequency: 17}
+    //   {min_probability: 0.2, max_probability: 0.3, frequency: 42}
+    //   {min_probability: 0.3, max_probability: 0.4, frequency: 99}
+    // mean that there are no record with an estimated probability in [0.1, 0.2)
+    // nor larger or equal to 0.4.
+    repeated DeltaPresenceEstimationHistogramBucket delta_presence_estimation_histogram = 1;
+  }
+
   // Privacy metric to compute.
   PrivacyMetric requested_privacy_metric = 1;
 
@@ -1161,6 +1377,8 @@ message AnalyzeDataSourceRiskDetails {
     LDiversityResult l_diversity_result = 6;
 
     KMapEstimationResult k_map_estimation_result = 7;
+
+    DeltaPresenceEstimationResult delta_presence_estimation_result = 9;
   }
 }
 
@@ -1395,6 +1613,8 @@ message CharacterMaskConfig {
 // If the bound Value type differs from the type of data
 // being transformed, we will first attempt converting the type of the data to
 // be transformed to match the type of the bound before comparing.
+//
+// See https://cloud.google.com/dlp/docs/concepts-bucketing to learn more.
 message FixedSizeBucketingConfig {
   // Lower bound value of buckets. All values less than `lower_bound` are
   // grouped together into a single bucket; for example if `lower_bound` = 10,
@@ -1422,6 +1642,7 @@ message FixedSizeBucketingConfig {
 // If the bound `Value` type differs from the type of data being transformed, we
 // will first attempt converting the type of the data to be transformed to match
 // the type of the bound before comparing.
+// See https://cloud.google.com/dlp/docs/concepts-bucketing to learn more.
 message BucketingConfig {
   // Bucket is represented as a range, along with replacement values.
   message Bucket {
@@ -1450,7 +1671,7 @@ message BucketingConfig {
 // replaced with the same surrogate.
 // Identifiers must be at least two characters long.
 // In the case that the identifier is the empty string, it will be skipped.
-// See [Pseudonymization](/dlp/docs/pseudonymization) for example usage.
+// See https://cloud.google.com/dlp/docs/pseudonymization to learn more.
 message CryptoReplaceFfxFpeConfig {
   // These are commonly used subsets of the alphabet that the FFX mode
   // natively supports. In the algorithm, the alphabet is selected using
@@ -1587,7 +1808,8 @@ message KmsWrappedCryptoKey {
 }
 
 // Shifts dates by random number of days, with option to be consistent for the
-// same context.
+// same context. See https://cloud.google.com/dlp/docs/concepts-date-shifting
+// to learn more.
 message DateShiftConfig {
   // Range of shift in days. Actual shift will be selected at random within this
   // range (inclusive ends). Negative means shift to earlier in time. Must not
@@ -1623,8 +1845,9 @@ message InfoTypeTransformations {
   // A transformation to apply to text that is identified as a specific
   // info_type.
   message InfoTypeTransformation {
-    // InfoTypes to apply the transformation to. Empty list will match all
-    // available infoTypes for this transformation.
+    // InfoTypes to apply the transformation to. An empty list will cause
+    // this transformation to apply to all findings that correspond to
+    // infoTypes that were requested in `InspectConfig`.
     repeated InfoType info_types = 1;
 
     // Primitive transformation to apply to the infoType. [required]
@@ -1801,20 +2024,21 @@ message TransformationSummary {
 message Schedule {
   oneof option {
     // With this option a job is started a regular periodic basis. For
-    // example: every 10 minutes.
+    // example: every day (86400 seconds).
     //
     // A scheduled start time will be skipped if the previous
     // execution has not ended when its scheduled time occurs.
     //
     // This value must be set to a time duration greater than or equal
-    // to 60 minutes and can be no longer than 60 days.
+    // to 1 day and can be no longer than 60 days.
     google.protobuf.Duration recurrence_period_duration = 1;
   }
 }
 
 // The inspectTemplate contains a configuration (set of types of sensitive data
 // to be detected) to be used anywhere you otherwise would normally specify
-// InspectConfig.
+// InspectConfig. See https://cloud.google.com/dlp/docs/concepts-templates
+// to learn more.
 message InspectTemplate {
   // The template name. Output only.
   //
@@ -1840,6 +2064,7 @@ message InspectTemplate {
 }
 
 // The DeidentifyTemplates contains instructions on how to deidentify content.
+// See https://cloud.google.com/dlp/docs/concepts-templates to learn more.
 message DeidentifyTemplate {
   // The template name. Output only.
   //
@@ -1875,6 +2100,7 @@ message Error {
 }
 
 // Contains a configuration to make dlp api calls on a repeating basis.
+// See https://cloud.google.com/dlp/docs/concepts-job-triggers to learn more.
 message JobTrigger {
   // What event needs to occur for a new job to be started.
   message Trigger {
@@ -1942,11 +2168,12 @@ message JobTrigger {
 }
 
 // A task to execute on the completion of a job.
+// See https://cloud.google.com/dlp/docs/concepts-actions to learn more.
 message Action {
   // If set, the detailed findings will be persisted to the specified
   // OutputStorageConfig. Only a single instance of this action can be
   // specified.
-  // Compatible with: Inspect
+  // Compatible with: Inspect, Risk
   message SaveFindings {
     OutputStorageConfig output_config = 1;
   }
@@ -2116,30 +2343,29 @@ message CreateDlpJobRequest {
 
 // Request message for ListJobTriggers.
 message ListJobTriggersRequest {
-  // The parent resource name, for example projects/my-project-id.
+  // The parent resource name, for example `projects/my-project-id`.
   string parent = 1;
 
   // Optional page token to continue retrieval. Comes from previous call
-  // to ListJobTriggers. `order_by` and `filter` should not change for
-  // subsequent calls, but can be omitted if token is specified.
+  // to ListJobTriggers. `order_by` field must not
+  // change for subsequent calls.
   string page_token = 2;
 
   // Optional size of the page, can be limited by a server.
   int32 page_size = 3;
 
   // Optional comma separated list of triggeredJob fields to order by,
-  // followed by 'asc/desc' postfix, i.e.
-  // `"create_time asc,name desc,schedule_mode asc"`. This list is
-  // case-insensitive.
+  // followed by `asc` or `desc` postfix. This list is case-insensitive,
+  // default sorting order is ascending, redundant space characters are
+  // insignificant.
   //
-  // Example: `"name asc,schedule_mode desc, status desc"`
+  // Example: `name asc,update_time, create_time desc`
   //
-  // Supported filters keys and values are:
+  // Supported fields are:
   //
   // - `create_time`: corresponds to time the triggeredJob was created.
   // - `update_time`: corresponds to time the triggeredJob was last updated.
-  // - `name`: corresponds to JobTrigger's display name.
-  // - `status`: corresponds to the triggeredJob status.
+  // - `name`: corresponds to JobTrigger's name.
   string order_by = 4;
 }
 
diff --git a/google/privacy/dlp/v2/storage.proto b/google/privacy/dlp/v2/storage.proto
index cb8e9c97..5c2ca503 100644
--- a/google/privacy/dlp/v2/storage.proto
+++ b/google/privacy/dlp/v2/storage.proto
@@ -29,7 +29,10 @@ option php_namespace = "Google\\Cloud\\Dlp\\V2";
 
 // Type of information detected by the API.
 message InfoType {
-  // Name of the information type.
+  // Name of the information type. Either a name of your choosing when
+  // creating a CustomInfoType, or one of the names listed
+  // at https://cloud.google.com/dlp/docs/infotypes-reference when specifying
+  // a built-in type.
   string name = 1;
 }
 
@@ -86,13 +89,13 @@ message CustomInfoType {
   // These types of transformations are
   // those that perform pseudonymization, thereby producing a "surrogate" as
   // output. This should be used in conjunction with a field on the
-  // transformation such as `surrogate_info_type`. This custom info type does
+  // transformation such as `surrogate_info_type`. This CustomInfoType does
   // not support the use of `detection_rules`.
   message SurrogateType {
 
   }
 
-  // Rule for modifying a custom info type to alter behavior under certain
+  // Rule for modifying a CustomInfoType to alter behavior under certain
   // circumstances, depending on the specific details of the rule. Not supported
   // for the `surrogate_type` custom info type.
   message DetectionRule {
@@ -125,10 +128,10 @@ message CustomInfoType {
       }
     }
 
-    // Detection rule that adjusts the likelihood of findings within a certain
+    // The rule that adjusts the likelihood of findings within a certain
     // proximity of hotwords.
     message HotwordRule {
-      // Regex pattern defining what qualifies as a hotword.
+      // Regular expression pattern defining what qualifies as a hotword.
       Regex hotword_regex = 1;
 
       // Proximity of the finding within which the entire hotword must reside.
@@ -151,29 +154,30 @@ message CustomInfoType {
     }
   }
 
-  // Info type configuration. All custom info types must have configurations
-  // that do not conflict with built-in info types or other custom info types.
+  // All CustomInfoTypes must have a name
+  // that does not conflict with built-in InfoTypes or other CustomInfoTypes.
   InfoType info_type = 1;
 
-  // Likelihood to return for this custom info type. This base value can be
+  // Likelihood to return for this CustomInfoType. This base value can be
   // altered by a detection rule if the finding meets the criteria specified by
   // the rule. Defaults to `VERY_LIKELY` if not specified.
   Likelihood likelihood = 6;
 
   oneof type {
-    // Dictionary-based custom info type.
+    // A list of phrases to detect as a CustomInfoType.
     Dictionary dictionary = 2;
 
-    // Regex-based custom info type.
+    // Regular expression based CustomInfoType.
     Regex regex = 3;
 
-    // Surrogate info type.
+    // Message for detecting output from deidentification transformations that
+    // support reversing.
     SurrogateType surrogate_type = 4;
   }
 
-  // Set of detection rules to apply to all findings of this custom info type.
+  // Set of detection rules to apply to all findings of this CustomInfoType.
   // Rules are applied in order that they are specified. Not supported for the
-  // `surrogate_type` custom info type.
+  // `surrogate_type` CustomInfoType.
   repeated DetectionRule detection_rules = 7;
 }
 
@@ -438,7 +442,7 @@ message EntityId {
 // Categorization of results based on how likely they are to represent a match,
 // based on the number of elements they contain which imply a match.
 enum Likelihood {
-  // Default value; information with all likelihoods is included.
+  // Default value; same as POSSIBLE.
   LIKELIHOOD_UNSPECIFIED = 0;
 
   // Few matching elements.