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- // Copyright (c) 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.
- //
- // Experimental Translation Assist Model to allow/suppress translation prompts.
- syntax = "proto2";
- option optimize_for = LITE_RUNTIME;
- import "nn_classifier.proto";
- import "translate_ranker_model.proto";
- import "generic_logistic_regression_model.proto";
- package assist_ranker;
- // Metadata for a ranker model instance. This data describes how the ranker
- // model should be interpreted/used.
- message RankerModelMetadata {
- // An identifier denoting the type or purpose of this model. E.g. "Translate".
- optional string name = 1;
- // An identifier denoting the specific instance of this model. For example:
- // "Experiment B"
- optional string label = 2;
- // An identifier, typically a URL, denoting the source from which this model
- // was obtained. The model referenced with a given source is presumed to be
- // immutable; this can be used as a cache control mechanism. If the currently
- // configured model source matches the source of a cached model, and the
- // cached model has not expired then there is no need to refresh the model.
- optional string source = 3;
- // The timestamp at which this model was downloaded. This will be set by the
- // model loader before it caches the model to disk.
- optional int64 last_modified_sec = 4;
- // The (optional) number of seconds after which this model should be
- // considered expired. If the value is zero or not set, then the cached
- // instance of the model never expires. A new download can be triggered by
- // changing the configured source URL for the model loader.
- optional int64 cache_duration_sec = 5;
- // The version of the model. E.g. 20171027.
- optional uint32 model_version = 6;
- // If true, feature names are hex hashes of the original feature names, and
- // hashing must be applied on feature names at prediction time.
- optional bool input_features_names_are_hex_hashes = 7;
- }
- // Defines an envelope/wrapper for general models.
- message RankerModelProto {
- // Metadata.
- optional RankerModelMetadata metadata = 1;
- oneof model {
- TranslateRankerModel translate = 2;
- GenericLogisticRegressionModel logistic_regression = 3;
- NNClassifierModel nn_classifier = 4;
- }
- }
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