tokenizer

Documentation

Overview

Package for tokenizing of Chinese text into multi-character terms and corresponding English equivalents.

Index

• type DictTokenizer
  • func (tokenizer DictTokenizer) Tokenize(text string) []TextToken
• type TextSegment
  • func Segment(text string) []TextSegment
• type TextToken
• type Tokenizer

Examples

• Segment

Types

type DictTokenizer

type DictTokenizer struct {
	WDict map[string]dicttypes.Word
}

Tokenizes Chinese text using a dictionary

func (DictTokenizer) Tokenize

func (tokenizer DictTokenizer) Tokenize(text string) []TextToken

Tokenizes a Chinese text string into words and other terms in the dictionary. If the terms are not found in the dictionary then individual characters will be returned. Compares left to right and right to left greedy methods, taking the one with the least tokens. Long text is handled by breaking the string into segments delimited by punctuation or non-Chinese characters.

type TextSegment

type TextSegment struct {

	// The text contained in the segment
	Text string

	// False if punctuation or non-Chinese text
	Chinese bool
}

A text segment that contains either Chinese or non-Chinese text

func Segment

func Segment(text string) []TextSegment

Segment a text document into segments of Chinese separated by either puncuation or non-Chinese text.

Example

A basic example of the function Segment

segments := Segment("你好 means hello")
fmt.Printf("Text: %s, Chinese: %t\n", segments[0].Text, segments[0].Chinese)
fmt.Printf("Text: %s, Chinese: %t\n", strings.TrimSpace(segments[1].Text), segments[1].Chinese)

Output:

Text: 你好, Chinese: true
Text: means hello, Chinese: false

type TextToken

type TextToken struct {
	Token     string
	DictEntry dicttypes.Word
	Senses    []dicttypes.WordSense
}

A text token contains the results of tokenizing a string

type Tokenizer

type Tokenizer interface {
	Tokenize(fragment string) []TextToken
}

Tokenizes Chinese text