src/main/proto/search/now/wire/feed/feature.proto

// Copyright 2018 The Feed Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto2";

package search.now.wire.feed;

option optimize_for=LITE_RUNTIME;

import "src/main/proto/search/now/wire/feed/content_id.proto";

option java_package = "com.google.search.now.wire.feed";
option java_outer_classname = "FeatureProto";

// Features define both the structure and content found in the Stream.
message Feature {
  // The ContentId identifying the parent feature for this feature.
  optional ContentId parent_id = 1;

  // Enum denoting which extension containing the renderable data is associated
  // with this Feature.
  enum RenderableUnit {
    UNKNOWN_RENDERABLE_UNIT = 0;
    STREAM = 1;
    CARD = 2;
    CONTENT = 3;
    CLUSTER = 4;
    TOKEN = 5;
    // Note: This is an experimental feature.
    CAROUSEL = 6;
  }
  optional RenderableUnit renderable_unit = 2;

  // Reserved fields for renderable unit extensions
  // Please use CL numbers you own for extension numbers.
  extensions 1000 to max;
}