KoreanStemmer

Namespace

Rowles.LeanCorpus.Analysis.Stemmers

Assembly

Rowles.LeanCorpus.dll

Korean stemmer — identity implementation.

public sealed class KoreanStemmer : ISpanStemmer

Inheritance

object

KoreanStemmer

Implements

ISpanStemmer

Remarks

Korean is a highly agglutinative language where grammatical information (tense, case, honorific level, negation, aspect) is encoded in chains of bound morphemes attached to a content root — for example, 먹다 (eat) → 먹었습니다, 먹고 싶어요, 먹히다. The boundaries between morphemes can require phonological rules (e.g. consonant assimilation) that cannot be resolved by simple string suffix removal.

Recommended pre-processing for Korean search:

• POS-tagging and morpheme segmentation with Mecab-ko, Komoran, or Nori
• Lemmatisation to dictionary base form (원형)
• Jamo decomposition for sub-syllable indexing when required

This class is provided so the ISpanStemmer pipeline compiles uniformly across all supported languages.

Stem(ReadOnlySpan<char>, Span<char>)

Stems word into output. Returns the length of the stemmed result, or -1 if output is too small. The caller must ensure output.Length >= word.Length for guaranteed success.

Stem(string)

Convenience overload returning the stemmed string.