Text spanishsnowballstemmer

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SpanishSnowballStemmer

Spanish stemming by the Snowball algorithm.

public static class SpanishSnowballStemmer

Example — a noun's four forms on one key.

using Lodestar.Text.Stemming;

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

Remarks — Spanish attaches object pronouns to the end of a verb — dámelo, cantándome — which would leave a suffix stemmer trimming the pronoun's ending instead of the verb's. The algorithm therefore opens with a step 0 that removes those attached pronouns before any ordinary suffix rule runs. It is the one structural difference from the French and Italian stemmers.

Accents are stripped last, after the rules. dámelo and damelo both reach damel, so a corpus that omits accents — as plenty of real Spanish text does — indexes to the same keys as one that keeps them.

Verb conjugation is where the collapse is largest: the present, preterite, imperfect, conditional and subjunctive forms of cantar all reduce to cant.

Reference behaviour is nltk.stem.snowball.SnowballStemmer("spanish"), matched over 127 words.

Applies to — net10.0, netstandard2.0.

See also — PortugueseSnowballStemmer, its nearest neighbour, and the stemming index.

Members

Member	What it does
SpanishSnowballStemmer.Stem	The Snowball stem of one Spanish word.