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The Stemmer project implements English Porter2 word stemming in the Elixir programming language.
About Stemmer
Stemmer is a repository containing an English stemming implementation written in Elixir. It uses the Porter2 algorithm to reduce inflected English words to a common stem, which is useful in linguistic morphology and information retrieval. The Stemmer.stem/1 function accepts a single word, a sentence, or a list of words. Output stems are not always valid dictionary words; for example, "capabilities" becomes "capabl".
The project states that it is compatible with the official Porter2 implementation and is tested against the official diffs.txt word list. It was built to support the Simple Bayes library. The repository page does not describe installation steps beyond the usage examples, and it does not state a pricing model.
Key features
- Stems a single English word, a sentence, or a list of words
- Returns a list of stems when given a list of words
- Implements the English Porter2 stemming algorithm in Elixir
- Tested against the official diffs.txt word list of more than 29,000 words
- Built to support the Simple Bayes library
Best for: Elixir developers who need English word stemming for text processing, search, or classification work.
Good for
- Stated to be compatible with the official Porter2 implementation
- Tested against the official diffs.txt word list
- Accepts single words, sentences, and lists of words
Watch out for
- Implements English stemming only
- Stems are not always valid dictionary words, as in "capabl"
Stemmer at a glance
- Website
- github.com/fredwu/stemmer
- Category
- Development › Programming Languages
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Stemmer FAQ
What input does Stemmer.stem/1 accept?
It accepts a single word as a string, a sentence as a string, or a list of single words as strings.
Is Stemmer compatible with the official Porter2 implementation?
The project states that it is 100% compatible with the official Porter2 implementation and is tested against the official diffs.txt word list, which contains more than 29,000 words.
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