1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
7 option optimize_for = LITE_RUNTIME;
9 package chrome_variations;
11 // This defines the Protocol Buffer representation of a Chrome Variations study
12 // as sent to clients of the Variations server.
16 // The name of the study. Should not contain spaces or special characters.
18 required string name = 1;
20 // The expiry date of the study in Unix time format. (Seconds since midnight
21 // January 1, 1970 UTC). See: http://en.wikipedia.org/wiki/Unix_time
23 // A study that has expired will be disabled, which will take precedence over
24 // a corresponding hardcoded field trial in the client.
26 // Ex: 1330893974 (corresponds to 2012-03-04 20:46:14Z)
27 optional int64 expiry_date = 3;
29 // Consistency setting for a study.
31 SESSION = 0; // Can't change within a session.
32 PERMANENT = 1; // Can't change for a given user.
35 // Consistency setting for this study. Optional - defaults to SESSION.
37 optional Consistency consistency = 7 [default = SESSION];
39 // Name of the experiment that gets the default experience. This experiment
40 // must be included in the list below.
42 optional string default_experiment_name = 8;
44 // An experiment within the study.
48 // A named parameter value for this experiment.
52 // The name of the parameter.
53 optional string name = 1;
55 // The value of the parameter.
56 optional string value = 2;
59 // The name of the experiment within the study.
61 required string name = 1;
63 // The cut of the total probability taken for this experiment (the x in
64 // x / N, where N is the sum of all x’s). Ex: "50"
65 required uint32 probability_weight = 2;
67 // Optional id used to uniquely identify this experiment for Google web
69 optional uint64 google_web_experiment_id = 3;
71 // Optional id used to uniquely identify this experiment for Google Update.
72 optional uint64 google_update_experiment_id = 4;
74 // Optional name of a Chrome flag that, when present, causes this experiment
75 // to be forced. If the forcing_flag field is set, users will not be
76 // assigned to this experiment unless that flag is present in Chrome's
78 optional string forcing_flag = 5;
80 // Parameter values for this experiment.
81 repeated Param param = 6;
84 // List of experiments in this study. This list should include the default /
85 // control experiment.
87 // For example, to specify that 99% of users get the default behavior, while
88 // 0.5% of users get experience "A" and 0.5% of users get experience "B",
89 // specify the values below.
90 // Ex: { "default": 990, "A": 5, "B": 5 }
91 repeated Experiment experiment = 9;
93 // Possible Chrome release channels.
94 // See: http://dev.chromium.org/getting-involved/dev-channel
96 // UNKNOWN value is defined here for the benefit of code using this enum
97 // type, but is not actually meant to be encoded in the protobuf.
105 // Possible Chrome operating system platforms.
107 PLATFORM_WINDOWS = 0;
110 PLATFORM_CHROMEOS = 3;
111 PLATFORM_ANDROID = 4;
115 // Filtering criteria specifying whether this study is applicable to a given
120 // The start date of the study in Unix time format. (Seconds since midnight
121 // January 1, 1970 UTC). See: http://en.wikipedia.org/wiki/Unix_time
122 // Ex: 1330893974 (corresponds to 2012-03-04 20:46:14Z)
123 optional int64 start_date = 1;
125 // The minimum Chrome version for this study, allowing a trailing '*'
126 // character for pattern matching. Inclusive. (To check for a match, iterate
127 // over each component checking >= until a * or end of string is reached.)
128 // Optional - if not specified, there is no minimum version.
129 // Ex: "17.0.963.46", "17.0.963.*", "17.*"
130 optional string min_version = 2;
132 // The maximum Chrome version for this study; same formatting as
133 // |min_version| above. Inclusive. (To check for a match, iterate over each
134 // component checking <= until a * or end of string is reached.)
135 // Optional - if not specified, there is no maximum version.
137 optional string max_version = 3;
139 // List of channels that will receive this study. If omitted, the study
140 // applies to all channels.
141 // Ex: [BETA, STABLE]
142 repeated Channel channel = 4;
144 // List of platforms that will receive this study. If omitted, the study
145 // applies to all platforms.
146 // Ex: [PLATFORM_WINDOWS, PLATFORM_MAC]
147 repeated Platform platform = 5;
149 // List of locales that will receive this study. If omitted, the study
150 // applies to all locales.
151 // Ex: ["en-US", "en-CA"]
152 repeated string locale = 6;
155 // Filtering criteria for this study. A study that is filtered out for a given
156 // client is equivalent to that study not being sent at all.
157 optional Filter filter = 10;
159 // Randomization seed to be used when |consistency| is set to PERMANENT. If
160 // not specified, randomization will be done using the trial name.
161 optional uint32 randomization_seed = 11;