Text Tokenization using Byte Pair Encoding and Unigram Modelling R package sentencepiece version 0.2.5 CRAN Task View: NaturalLanguageProcessing (https://CRAN.R-project.org/view=NaturalLanguageProcessing) Unsupervised text tokenizer allowing to perform byte pair encoding and unigram modelling. Wraps the 'sentencepiece' library <https://github.com/google/sentencepiece> which provides a language independent tokenizer to split text in words and smaller subword units. The techniques are explained in the paper "SentencePiece: A simple and language independent subword tokenizer and detokenizer for Neural Text Processing" by Taku Kudo and John Richardson (2018) <doi:10.18653/v1/D18-2012>. Provides as well straightforward access to pretrained byte pair encoding models and subword embeddings trained on Wikipedia using 'word2vec', as described in "BPEmb: Tokenization-free Pre-trained Subword Embeddings in 275 Languages" by Benjamin Heinzerling and Michael Strube (2018) <http://www.lrec-conf.org/proceedings/lrec2018/pdf/1049.pdf>. Software Depends: R (>= 2.10) Imports: Rcpp (>= 0.11.5), stats LinkingTo: Rcpp Suggests: tokenizers.bpe, word2vec (>= 0.2.0) Jan Wijffels <jwijffels@bnosac.be> Comprehensive R Archive Network (CRAN) Jan Wijffels [aut, cre, cph] (R wrapper), BNOSAC [cph] (R wrapper), Google Inc. [ctb, cph] (Files at src/sentencepiece/src (Apache License, Version 2.0), The Abseil Authors [ctb, cph] (Files at src/third_party/absl (Apache License, Version 2.0), Google Inc. [ctb, cph] (Files at src/third_party/protobuf-lite (BSD-3 License)), Kenton Varda (Google Inc.) [ctb, cph] (Files at src/third_party/protobuf-lite: coded_stream.cc, extension_set.cc, generated_message_util.cc, generated_message_util.cc, message_lite.cc, repeated_field.cc, wire_format_lite.cc, zero_copy_stream.cc, zero_copy_stream_impl_lite.cc, google/protobuf/extension_set.h, google/protobuf/generated_message_util.h, google/protobuf/wire_format_lite.h, google/protobuf/wire_format_lite_inl.h, google/protobuf/message_lite.h, google/protobuf/repeated_field.h, google/protobuf/io/coded_stream.h, google/protobuf/io/zero_copy_stream_impl_lite.h, google/protobuf/io/zero_copy_stream.h, google/protobuf/stubs/common.h, google/protobuf/stubs/hash.h, google/protobuf/stubs/once.h, google/protobuf/stubs/once.h.org (BSD-3 License)), Sanjay Ghemawat (Google Inc.) [ctb, cph] (Design of files at src/third_party/protobuf-lite: coded_stream.cc, extension_set.cc, generated_message_util.cc, generated_message_util.cc, message_lite.cc, repeated_field.cc, wire_format_lite.cc, zero_copy_stream.cc, zero_copy_stream_impl_lite.cc, google/protobuf/extension_set.h, google/protobuf/generated_message_util.h, google/protobuf/wire_format_lite.h, google/protobuf/wire_format_lite_inl.h, google/protobuf/message_lite.h, google/protobuf/repeated_field.h, google/protobuf/io/coded_stream.h, google/protobuf/io/zero_copy_stream_impl_lite.h, google/protobuf/io/zero_copy_stream.h (BSD-3 License)), Jeff Dean (Google Inc.) [ctb, cph] (Design of files at src/third_party/protobuf-lite: coded_stream.cc, extension_set.cc, generated_message_util.cc, generated_message_util.cc, message_lite.cc, repeated_field.cc, wire_format_lite.cc, zero_copy_stream.cc, zero_copy_stream_impl_lite.cc, google/protobuf/extension_set.h, google/protobuf/generated_message_util.h, google/protobuf/wire_format_lite.h, google/protobuf/wire_format_lite_inl.h, google/protobuf/message_lite.h, google/protobuf/repeated_field.h, google/protobuf/io/coded_stream.h, google/protobuf/io/zero_copy_stream_impl_lite.h, google/protobuf/io/zero_copy_stream.h (BSD-3 License)), Laszlo Csomor (Google Inc.) [ctb, cph] (Files at src/third_party/protobuf-lite: io_win32.cc, google/protobuf/stubs/io_win32.h (BSD-3 License)), Wink Saville (Google Inc.) [ctb, cph] (Files at src/third_party/protobuf-lite: message_lite.cc, google/protobuf/wire_format_lite.h, google/protobuf/wire_format_lite_inl.h, google/protobuf/message_lite.h (BSD-3 License)), Jim Meehan (Google Inc.) [ctb, cph] (Files at src/third_party/protobuf-lite: structurally_valid.cc (BSD-3 License)), Chris Atenasio (Google Inc.) [ctb, cph] (Files at src/third_party/protobuf-lite: google/protobuf/wire_format_lite.h (BSD-3 License)), Jason Hsueh (Google Inc.) [ctb, cph] (Files at src/third_party/protobuf-lite: google/protobuf/io/coded_stream_inl.h (BSD-3 License)), Anton Carver (Google Inc.) [ctb, cph] (Files at src/third_party/protobuf-lite: google/protobuf/stubs/map_util.h (BSD-3 License)), Maxim Lifantsev (Google Inc.) [ctb, cph] (Files at src/third_party/protobuf-lite: google/protobuf/stubs/mathlimits.h (BSD-3 License)), Susumu Yata [ctb, cph] (Files at src/third_party/darts_clone (BSD-3 License), Daisuke Okanohara [ctb, cph] (File src/third_party/esaxx/esa.hxx (MIT License)), Yuta Mori [ctb, cph] (File src/third_party/esaxx/sais.hxx (MIT License)), Benjamin Heinzerling [ctb, cph] (Files data/models/nl.wiki.bpe.vs1000.d25.w2v.txt, data/models/nl.wiki.bpe.vs1000.d25.w2v.bin and data/models/nl.wiki.bpe.vs1000.model (MIT License)) MPL-2.0 2026-02-09 application/tgz https://CRAN.R-project.org/package=sentencepiece doi:10.32614/CRAN.package.sentencepiece