Lucy::Analysis::Normalizer - Unicode normalization,
case folding and accent stripping
Normalizer is an Analyzer which normalizes tokens to one of the Unicode normalization forms.
my $normalizer = Lucy::Analysis::Normalizer->new;
my $polyanalyzer = Lucy::Analysis::PolyAnalyzer->new(
analyzers => [ $normalizer, $tokenizer, $stemmer ],
Optionally, it performs Unicode case folding and converts accented characters to their base character.
If you use highlighting, Normalizer should be run after tokenization because it might add or remove characters.
my $normalizer = Lucy::Analysis::Normalizer->new(
normalization_form => 'NFKC',
case_fold => 1,
strip_accents => 0,
- normalization_form - Unicode normalization form, can be one of 'NFC', 'NFKC', 'NFD', 'NFKD'. Defaults to 'NFKC'.
- case_fold - Perform case folding, default is true.
- strip_accents - Strip accents, default is false.
Lucy::Analysis::Normalizer isa Lucy::Analysis::Analyzer isa Lucy::Object::Obj.