proto/asset_type.proto

// Copyright 2026 Google LLC
//
// 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
//
//    https://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.
//

edition = "2023";

package credentio;

import "cbor/tags.proto";

option java_multiple_files = true;
option java_outer_classname = "AssetTypeOuterClass";

// The asset type assertion provides a way to more completely describe an asset
// specifically additional context on how to parse or otherwise process it when
// its `dc:format` is insufficient.  It can also be used to describe externally
// referenced or related assets such as AI/ML models.
//
// See
// https://spec.c2pa.org/specifications/specifications/2.4/specs/C2PA_Specification.html#_asset_type
// for more details.
message AssetType {
  // The type of asset. This can either be a custom value or one of the provided
  // choices in
  // https://spec.c2pa.org/specifications/specifications/2.4/specs/C2PA_Specification.html#_schema_and_example_11.
  // If a custom value is used, it must satisfy the regex specified in the C2PA
  // spec linked above.
  string type = 1 [(cbor.tags) = { is_required: true }];
  // Version of the asset.
  string version = 2;
}