Update trace proto

google/devtools/cloudtrace/v1/trace.proto

@@ -1,4 +1,4 @@
-// Copyright (c) 2015, Google Inc.
+// Copyright 2016 Google Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -41,8 +41,8 @@ service TraceService {
     option (google.api.http) = { get: "/v1/projects/{project_id}/traces/{trace_id}" };
   }
 
-  // Sends new traces to Cloud Trace or updates existing traces. If the ID of
-  // a trace that you send matches that of an existing trace, any fields
+  // Sends new traces to Stackdriver Trace or updates existing traces. If the ID
+  // of a trace that you send matches that of an existing trace, any fields
   // in the existing trace and its spans are overwritten by the provided values,
   // and any new fields provided are merged with the existing trace data. If the
   // ID does not match, a new trace is created.
@@ -93,7 +93,8 @@ message TraceSpan {
     RPC_CLIENT = 2;
   }
 
-  // Identifier for the span. This identifier must be unique within a trace.
+  // Identifier for the span. Must be a 64-bit integer other than 0 and
+  // unique within a trace.
   fixed64 span_id = 1;
 
   // Distinguishes between spans generated in a particular context. For example,
@@ -102,10 +103,11 @@ message TraceSpan {
   SpanKind kind = 2;
 
   // Name of the trace. The trace name is sanitized and displayed in the
-  // Cloud Trace tool in the Google Developers Console. The name may be a method
-  // name or some other per-call site name. For the same executable and the same
-  // call point, a best practice is to use a consistent name, which makes it
-  // easier to correlate cross-trace spans.
+  // Stackdriver Trace tool in the Google Developers Console.
+  // The name may be a method name or some other per-call site name.
+  // For the same executable and the same call point, a best practice is
+  // to use a consistent name, which makes it easier to correlate
+  // cross-trace spans.
   string name = 3;
 
   // Start time of the span in nanoseconds from the UNIX epoch.