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ItalianSnowballStemmer

Italian stemming by the Snowball algorithm.

public static class ItalianSnowballStemmer

Example — the four endings of one noun.

using Lodestar.Text.Stemming;

string masculine = ItalianSnowballStemmer.Stem("musico");  // => music
string feminine = ItalianSnowballStemmer.Stem("musica");  // => music
string plural = ItalianSnowballStemmer.Stem("musiche");  // => music

Remarks — two preparations run before the suffix rules, and both change what matches. Acute accents are folded to grave (á → à and so on), so the two ways Italian text writes a stressed vowel cannot produce two keys — attività and attivita both reach attiv. Then u and i between two vowels are marked as consonants, which is what they are in Italian phonology and what several suffix rules depend on.

This stemmer carries the one deliberate divergence in the namespace. The published Snowball description replaces the suffix enza/enze with ente; nltk replaces it with te, and this implementation follows nltk, so esistenza stems to esistt rather than esistent. decisions/0006 records why matching the library everyone actually compares against won over matching the text.

Reference behaviour is nltk.stem.snowball.SnowballStemmer("italian"), matched over 96 words.

Applies to — net10.0, netstandard2.0.

See also — FrenchSnowballStemmer and SpanishSnowballStemmer, which share the region scheme, and the stemming index.

Members

Member	What it does
ItalianSnowballStemmer.Stem	The Snowball stem of one Italian word.