// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto2";

option optimize_for = LITE_RUNTIME;

package ukm;

// Next tag: 6
message Entry {
  // Unique identifier for an Event. This is used to provide hierarchical
  // structure for Events.
  optional int32 id = 1;

  // Parent id, which is associated with an id for another Event. This is set
  // only if the Event has another Event which can be considered a parent.
  // This is to provide hierarchies for Events.
  optional int32 parent_id = 2;

  // The id of the Source this Event is associated with.
  optional int64 source_id = 3;

  // Type of the Event. This is a hash of the name (as a string).
  optional fixed64 event_hash = 4;

  // For each Event, we have a list of possible metrics included. It's possible
  // for a single metric name to be repeated. There is also no guarentee that
  // all metrics that are available for a given event will be provided for a
  // single Entry.
  message Metric {
    optional fixed64 metric_hash = 1;
    optional int64 value = 2;
  }
  repeated Metric metrics = 5;
}