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module analysis::text::stemming::Snowball

rascal-0.34.0

Provides the library of stemmers written in the Snowball languages, and compiled to Java, which are distributed with Lucene as a Rascal module.

Usage​

import analysis::text::stemming::Snowball;

See the Snowball homepage for more informations

Examples​

rascal>import analysis::text::stemming::Snowball;
ok
rascal>stem("bikes")
str: "bike"
---
bike
---

data Language​

data Language  
     = armenian()
     | basque()
     | catalan()
     | danish()
     | dutch()
     | english()
     | finnish()
     | french()
     | german()
     | german2()
     | hungarian()
     | irish()
     | italian()
     | lithuanian()
     | norwegian()
     | portugese()
     | romanian()
     | russian()
     | spanish()
     | swedish()
     | turkish()
     ;

function stem​

Stemming algorithms from the Tartarus Snowball the Snowball homepage for different languages.

str stem(str word, Language lang=english())

This library wrapped into a single function supports Armenian, Basque, Catalan, Danish, Dutch, English, Finnish, French, German, Hungarian, Irish, Italian, Lithuanian, Norwegian, Portugese, Romanian, Russian, Spanish, Swedish and Turkish.

function kraaijPohlmannStemmer​

Kraaij-Pohlmann is a well-known stemmer for the Dutch language.

str kraaijPohlmannStemmer(str word)

See http://snowball.tartarus.org/algorithms/kraaij_pohlmann/stemmer.html

function porterStemmer​

Porter stemming is a "standard" stemming algorithm for English of sorts.

str porterStemmer(str word)

See http://snowball.tartarus.org/algorithms/porter/stemmer.html for more information.

function lovinsStemmer​

Lovins designed the first stemmer according to the Tartarus website.

str lovinsStemmer(str word)

See http://snowball.tartarus.org/algorithms/lovins/stemmer.html