tensorflow_lite_support/custom_ops/kernel/sentencepiece/encoder_config.fbs

// Copyright 2020 The TensorFlow Authors. All Rights Reserved.
//
// 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.
include "config.fbs";

namespace tflite.ops.custom.sentencepiece;

table EncoderConfig {
  // Version of the encoder.
  version: EncoderVersion = SENTENCE_PIECE;
  start_code: int32 = 0;
  end_code: int32 = 0;

  unknown_code: int32 = -1;
  // Weight of "unknown code" when encoding. "Penalty" because it usually has a
  // big negative weight,less than any other sentencepiece.
  unknown_penalty: float = 0;

  // The offset for encoding, usually used when codes with low codes are reserved
  // for some special needs.
  encoding_offset: int32;

  // String pieces for encoding.
  pieces: Trie;
  pieces_scores: [float];

  // Normalization related parameters.
  remove_extra_whitespaces: bool;

  // Add a whitespace prefix before encoding.
  add_dummy_prefix: bool;

  // Escape whitespaces during encoding so the decoder can restore them exactly as
  // in the input.
  escape_whitespaces: bool;

  // Normalization parameters.
  normalized_prefixes: Trie;
  normalized_replacements: [byte];
}

root_type EncoderConfig;