NAME

Lucy::Analysis::Normalizer - Unicode normalization, case folding and accent stripping.

SYNOPSIS

    my $normalizer = Lucy::Analysis::Normalizer->new;
    
    my $polyanalyzer = Lucy::Analysis::PolyAnalyzer->new(
        analyzers => [ $tokenizer, $normalizer, $stemmer ],
    );

DESCRIPTION

Normalizer is an Analyzer which normalizes tokens to one of the Unicode normalization forms. 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.

CONSTRUCTORS

new

    my $normalizer = Lucy::Analysis::Normalizer->new(
        normalization_form => 'NFKC',
        case_fold          => 1,
        strip_accents      => 0,
    );

Create a new Normalizer.

• 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.

METHODS

transform

    my $inversion = $normalizer->transform($inversion);

Take a single Inversion as input and returns an Inversion, either the same one (presumably transformed in some way), or a new one.

• inversion - An inversion.

INHERITANCE

Lucy::Analysis::Normalizer isa Lucy::Analysis::Analyzer isa Clownfish::Obj.