fuzzy search on plone & search for east asian language

Fuzzy Search on Plone and Search for East Asian Language

CMS communications Inc,Manabu TERADA terada@cmscom.jp

http://www.cmscom.jp 4 / Oct / 2013

Plone Conference 2013 in Brasilia

Who I am? (お前だれよ？)

•Manabu TERADA (寺田学) @terapyon•Advisory Board Member of Plone Foundation•Chair of PyCon APAC 2013 in Japan•Owner of CMS communications Inc.•Member of Plone Users Group Japan

•Authors

Contents

•About Japanese Language and other Languages

•Fuzzy Search on Plone•About the product•Basic technology•Dependencies•Domo•Structure of the product•The plan of future

Language Questions

ありがとう Thank you Obrigado

Gracias 谢谢 감사 합니다

ขอบคุณ Спасибо شكرا

Language Questions

ありがとう日本語

Thank youEnglish

ObrigadoPortuguese

GraciasSpanish

谢谢

Chinese감사 합니다

Korean

ขอบคุณThai

СпасибоRussian

شكرا

Arabic

Language Questions

•Double bytes

Thank youEnglish

GraciasSpanish

谢谢

Korean

شكرا

Arabic

ObrigadoPortuguese

Language Questions

•Double bytes

Thank youEnglish

GraciasSpanish

谢谢

Korean

شكرا

Arabic

ObrigadoPortuguese

Language Questions

•Left to Right (LTR) or Right to Left (RTL)

Thank youEnglish

GraciasSpanish

谢谢

Korean

شكرا

Arabic

ObrigadoPortuguese

Language Questions

•Left to Right (LTR) or Right to Left (RTL)

Thank youEnglish

GraciasSpanish

谢谢

Korean

شكرا

Arabic

ObrigadoPortuguese

Language Questions

•No white space?

Thank youEnglish

GraciasSpanish

谢谢

Korean

شكرا

Arabic

ObrigadoPortuguese

Language Questions

•No white space

Thank youEnglish

GraciasSpanish

谢谢

Korean

شكرا

Arabic

ObrigadoPortuguese

Japanese

•Can you read this Japanese?

•私は寺田学です。日本の東京から来ました。ブラジルに来たのは初めてです。•I am Manabu TERADA. I came from Tokyo, Japan. I have come to Brazil for the first time.

•私は寺田学です。日本の東京から来ました。ブラジルに来たのは初めてです。

Japanese

•Japanese doesn’t have white space for splitting words.•Japanese has 3 different characters,•Hiragana, Katakana, Kanji•Hiragana and Katakana are each 50 characters•Kanji is over 2000 characters•Japanese has same homonym by different characters, and has different homonym by same character.

Japanese

•They are the same meaning.•Kyoto ← Roma-ji•京都 ← Kanji•きょうと ← Hiragana•キョウト ← Katakana

Japanese

•Can you read?•橋　→　ハシ　→　Hashi•端　→　ハシ　→　Hashi•箸　→　ハシ　→　Hashi

•They are different meaning.•We can understand those by context.

Japanese and other Languages

•We have a lot of languages. •We have a lot of rules.•We have a lot of issues.

•I want to have any solutions in Plone.

Fuzzy Search on Plone

Fuzzy Search

•Name: c2.search.fuzzy•1.0a5 (alpha release)

https://pypi.python.org/pypi/c2.search.fuzzyhttps://bitbucket.org/cmscom/c2.search.fuzzy

5 About

•We want to get suggestions the same as Google.

•In the Intranet, we can NOT use Google.

•NOT use Solr. I know Solr is working well, •But, it's difficult to install/configure/implement.

•And, I want to build own system.

Basic technology

•This system is not difficult.

•Keywords•Levenshtein Distance•Sorted list•Automata system

Basic technology

the Levenshtein distance is a string metric for measuring the difference between two sequences. Informally, the Levenshtein distance between two words is the minimum number of single-character edits (insertion, deletion, substitution) required to change one word into the other. The phrase edit distance is often used to refer specifically to Levenshtein distance. It is named after Vladimir Levenshtein, who considered this distance in 1965.[1] It is closely related to pairwise string alignments.

From WikiPedia: http://en.wikipedia.org/wiki/Levenshtein_distance

Basic technology

Levenshtein Distance•base word: “plone”

•Zero Distance•PLONE, Plone, pLone•One Distance•Phone, plene, plne, lone, ploneg, .....•Two Distance•one, plo, polne, ......

Basic technology

Sorted list•Ordered container (List) or \•Can get Order of words

Sorted Order from Unicode (by alphabet)

['Argentina', 'Australia', 'Brazil', 'Canada', 'China', 'European Union', 'France', 'Germany', 'India', 'Indonesia', 'Italy', 'Japan', 'Mexico', 'Russia', 'Saudi Arabia', 'South Africa', 'South Korea', 'Turkey', 'United Kingdom', 'United States']

for example (G20’s countries)

Basic technology

From @hiratara’s slide:http://www.slideshare.net/hiratara/levenshtein-automata

Basic technology

Levenshtein Automata

•I found a good blog entry:•“Damn Cool Algorithms: Levenshtein Automata”•http://blog.notdot.net/2010/07/Damn-Cool-Algorithms-Levenshtein-Automata•https://gist.github.com/Arachnid/491973

•It’s only using Python!!

Basic technology

Index•It create original index, like a Sorted List, when Plone content is being created or modified.

Search•Searching from original index when we input into search-box.•Correct spelling will be shown in original index in less distance.•Because, It can be shown inside Plone content.

Basic technology

•For example,•We want to show by one distance (it’s default).•From the G20 countries list.•Brezil → Brazil•Japon → Japan

•And, it use Automata system for increased speed.

Dependencies

We need only Python.

Dependencies

•We use MeCab for Japanese support.•Japanese don’t has white space for splitting word.•(same as Chinese and Koran)

Dependencies

•Support language•English and other European languages•MAYBE: Arabic

•Chinese and Korean•It’s need to work splitting system•I don’t know it.

•View the video on YouTubehttp://youtu.be/e5DHsF7Gi70

Structure of the product

•Index data will be stored in ZODB, it's List object.

•When it being created or modified, will update the List by sorted.•List is into Dict, Dict key is phonetic (or lower case in English), value is original word.

[{'argentina' : ['Argentina', 'argentina', 'ARGENTINA']}, {'australia': ['Australia']}, {'brazil' : ['Brazil]}, {'きょうと' : ['京都', 'キョウト']}]

Example Index data

•Search •Checking the List from input word for less distance by automata system.

•It's shown the original word from list in Dict values under the search-box by JavaScript.

for Japanese

•I'm using MeCab for splitting and getting phonetic.

•It's stored phonetic and original word. •Because Japanese has same homonym by different characters

The plan of future

•Now, I'm using ZODB for index storing.•I want to have a option, Storing to RDBMS. I'm trying to develop it.

•I want to support more language.•Please help me for more support languages.

Thanks

•Japanese & East Asian languages•We have any problems yet in Plone.•I think Plone is working well in multi languages.•I wish Plone will be continuous working well.•All developers, you never forget other languages.

•Fuzzy search•I want to get the bug report.•Please try to use the product.

12 Special thanks

• Supported by

• ike @rokujyouhitoma

• @hiratara

• Referred web site• http://blog.notdot.net/2010/07/Damn-Cool-Algorithms-Levenshtein-Automata

13 Contact me

• Twitter: @terapyon

• Facebook: https://www.facebook.com/terapyon

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