mpstemmer

Multi-phase stemmer: stemmer for Indonesian.

The base stemmer algorithm is based on Adriani et al. (2007), modified to work with both standard (baku) and nonstandard (tak baku) words.

Installation

pip install --upgrade git+https://github.com/ariaghora/mpstemmer.git

Usage

from mpstemmer import MPStemmer

stemmer = MPStemmer()

print(stemmer.stem('mengemudi')) # => kemudi
print(stemmer.stem('belajar')) # => ajar
print(stemmer.stem('ngelepas')) # => lepas
print(stemmer.stem('kebayang')) # => bayang

print(stemmer.stem_kalimat('ngelupain mantan tuh ngga susah kok bro'))
# => lupa mantan itu tidak susah kok bro

Performance comparison

Please refer to this page for an in-depth comparison against PySastrawi and other existing works.

Citation

@Misc{PrabonoMpstemmer2020,
title = {Mpstemmer: a multi-phase stemmer for standard and nonstandard Indonesian words},
author = {Prabono, Aria Ghora},
year = {2020},
url = {https://github.com/ariaghora/mpstemmer}
}

References

• Adriani, M., Asian, J., Nazief, B., Tahaghoghi, S.M. and Williams, H.E., 2007. Stemming Indonesian: A confix-stripping approach. ACM Transactions on Asian Language Information Processing (TALIP), 6(4), pp.1-33.
• Putra, Rahardyan Bisma Setya, Ema Utami, and Suwanto Raharjo. "Optimalisasi Stemming Kata Berimbuhan Tidak Baku Pada Bahasa Indonesia Dengan Levenshtein Distance." Jurnal Informatika: Jurnal Pengembangan IT 3.2 (2018): 200-205.
• Qulub, Mudawil, Ema Utami, and Andi Sunyoto. "Stemming Kata Berimbuhan Tidak Baku Bahasa Indonesia Menggunakan Algoritma Jaro-Winkler Distance." Creative Information Technology Journal 5.4 (2020): 254-263.

Known issues and limitations

• Implemented rules so far:
  • "be-": rule 1-5 (completed)
  • "te-": rule 6-9 (completed)
  • "me-": rule 10-19 (completed)
  • "pe-": rule 20-29
• The nonstandard words are supposed to be "Java-centric" ("nyeselin", "ngenes", "sepagian", etc.). Stemming and correction for the words influenced by other local languages are not supported.