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 // Possible form factors Chrome is running on.
122 // Filtering criteria specifying whether this study is applicable to a given
127 // The start date of the study in Unix time format. (Seconds since midnight
128 // January 1, 1970 UTC). See: http://en.wikipedia.org/wiki/Unix_time
129 // Ex: 1330893974 (corresponds to 2012-03-04 20:46:14Z)
130 optional int64 start_date = 1;
132 // The minimum Chrome version for this study, allowing a trailing '*'
133 // character for pattern matching. Inclusive. (To check for a match, iterate
134 // over each component checking >= until a * or end of string is reached.)
135 // Optional - if not specified, there is no minimum version.
136 // Ex: "17.0.963.46", "17.0.963.*", "17.*"
137 optional string min_version = 2;
139 // The maximum Chrome version for this study; same formatting as
140 // |min_version| above. Inclusive. (To check for a match, iterate over each
141 // component checking <= until a * or end of string is reached.)
142 // Optional - if not specified, there is no maximum version.
144 optional string max_version = 3;
146 // List of channels that will receive this study. If omitted, the study
147 // applies to all channels.
148 // Ex: [BETA, STABLE]
149 repeated Channel channel = 4;
151 // List of platforms that will receive this study. If omitted, the study
152 // applies to all platforms.
153 // Ex: [PLATFORM_WINDOWS, PLATFORM_MAC]
154 repeated Platform platform = 5;
156 // List of locales that will receive this study. If omitted, the study
157 // applies to all locales.
158 // Ex: ["en-US", "en-CA"]
159 repeated string locale = 6;
161 // List of form factors that will receive this study. If omitted, the study
162 // applies to all form factors.
163 // Ex: [PHONE, TABLET]
164 repeated FormFactor form_factor = 7;
167 // Filtering criteria for this study. A study that is filtered out for a given
168 // client is equivalent to that study not being sent at all.
169 optional Filter filter = 10;
171 // Randomization seed to be used when |consistency| is set to PERMANENT. If
172 // not specified, randomization will be done using the trial name.
173 optional uint32 randomization_seed = 11;
175 // Specifies whether the study starts as active initially, or whether it
176 // requires the client to query its state before it is marked as active.
177 enum ActivationType {
178 // The study will be activated when its state is queried by the client.
179 // This is recommended for most studies that include client code.
180 ACTIVATION_EXPLICIT = 0;
181 // The study will be automatically activated when it is created. This
182 // is recommended for studies that do not have any client logic.
186 // Activation type for this study. Defaults to ACTIVATION_EXPLICIT if omitted.
187 optional ActivationType activation_type = 12;