diff --git a/google/appengine/logging/v1/BUILD.bazel b/google/appengine/logging/v1/BUILD.bazel
new file mode 100644
index 00000000..c2b74503
--- /dev/null
+++ b/google/appengine/logging/v1/BUILD.bazel
@@ -0,0 +1,165 @@
+# This file was automatically generated by BuildFileGenerator
+
+# This is an API workspace, having public visibility by default makes perfect sense.
+package(default_visibility = ["//visibility:public"])
+
+##############################################################################
+# Common
+##############################################################################
+load("@rules_proto//proto:defs.bzl", "proto_library")
+
+proto_library(
+    name = "logging_proto",
+    srcs = [
+        "request_log.proto",
+    ],
+    deps = [
+        "//google/logging/type:type_proto",
+        "@com_google_protobuf//:duration_proto",
+        "@com_google_protobuf//:timestamp_proto",
+    ],
+)
+
+##############################################################################
+# Java
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "java_grpc_library",
+    "java_proto_library",
+)
+
+java_proto_library(
+    name = "logging_java_proto",
+    deps = [":logging_proto"],
+)
+
+java_grpc_library(
+    name = "logging_java_grpc",
+    srcs = [":logging_proto"],
+    deps = [":logging_java_proto"],
+)
+
+##############################################################################
+# Go
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "go_proto_library",
+)
+
+go_proto_library(
+    name = "logging_go_proto",
+    compilers = ["@io_bazel_rules_go//proto:go_grpc"],
+    importpath = "google.golang.org/genproto/googleapis/appengine/logging/v1",
+    protos = [":logging_proto"],
+    deps = [
+        "//google/logging/type:type_go_proto",
+    ],
+)
+
+##############################################################################
+# Python
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "moved_proto_library",
+    "py_grpc_library",
+    "py_proto_library",
+)
+
+moved_proto_library(
+    name = "logging_moved_proto",
+    srcs = [":logging_proto"],
+    deps = [
+        "//google/logging/type:type_proto",
+        "@com_google_protobuf//:duration_proto",
+        "@com_google_protobuf//:timestamp_proto",
+    ],
+)
+
+py_proto_library(
+    name = "logging_py_proto",
+    plugin = "@protoc_docs_plugin//:docs_plugin",
+    deps = [":logging_moved_proto"],
+)
+
+py_grpc_library(
+    name = "logging_py_grpc",
+    srcs = [":logging_moved_proto"],
+    deps = [":logging_py_proto"],
+)
+
+##############################################################################
+# PHP
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "php_grpc_library",
+    "php_proto_library",
+)
+
+php_proto_library(
+    name = "logging_php_proto",
+    deps = [":logging_proto"],
+)
+
+php_grpc_library(
+    name = "logging_php_grpc",
+    srcs = [":logging_proto"],
+    deps = [":logging_php_proto"],
+)
+
+##############################################################################
+# Node.js
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "nodejs_gapic_assembly_pkg",
+    "nodejs_gapic_library",
+)
+
+##############################################################################
+# Ruby
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "ruby_grpc_library",
+    "ruby_proto_library",
+)
+
+ruby_proto_library(
+    name = "logging_ruby_proto",
+    deps = [":logging_proto"],
+)
+
+ruby_grpc_library(
+    name = "logging_ruby_grpc",
+    srcs = [":logging_proto"],
+    deps = [":logging_ruby_proto"],
+)
+
+##############################################################################
+# C#
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "csharp_grpc_library",
+    "csharp_proto_library",
+)
+
+csharp_proto_library(
+    name = "logging_csharp_proto",
+    deps = [":logging_proto"],
+)
+
+csharp_grpc_library(
+    name = "logging_csharp_grpc",
+    srcs = [":logging_proto"],
+    deps = [":logging_csharp_proto"],
+)
+
+##############################################################################
+# C++
+##############################################################################
+# Put your C++ code here
diff --git a/google/appengine/logging/v1/request_log.proto b/google/appengine/logging/v1/request_log.proto
index f3e2630a..606ccd2e 100644
--- a/google/appengine/logging/v1/request_log.proto
+++ b/google/appengine/logging/v1/request_log.proto
@@ -1,4 +1,4 @@
-// Copyright 2016 Google Inc.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -182,6 +182,10 @@ message RequestLog {
   // Stackdriver Trace identifier for this request.
   string trace_id = 39;
 
+  // If true, the value in the 'trace_id' field was sampled for storage in a
+  // trace backend.
+  bool trace_sampled = 43;
+
   // Source code for the application that handled this request. There can be
   // more than one source reference per deployed application if source code is
   // distributed among multiple repositories.