The PATENTSCOPE search system: CLIR February 2013 Sandrine Ammann Marketing & Communications Officer

To the PATENTSCOPE search system webinar CLIR

Agenda CLIR Definition History Search with CLIR Usefulness Golden rules Technicalities Q & A session

CLIR Cross-Lingual Information Retrieval Finds synonyms in different domains Translates those found synonyms + original query into different languages

CLIR – 12 languages available NON-ASIAN Dutch English French German Italian Portuguese Russian Spanish Swedish ASIAN Chinese Japanese Korean

History

Lower language barriers in patent search First language tool developed in-house

CLIR: the interface

CLIR: precision vs recall Precision = the ability to retrieve the most precise results. Trying to find only precisely relevant items (high precision) = miss important items because they don't use quite the same vocabulary. Recall = the ability to retrieve as many documents as possible that match or are related to a query. Trying to find all the relevant items (high recall) = often get a lot of junk.

CLIR: precision vs recall

Example: precision

Example: recall

Example: ARM

CHIP

CLIR: supervised mode 2 modes: automatic and supervised Automatic: 1 step Supervised: 4 steps

Cross-Lingual Expansion (CLIR)

Result : the query from “container” to:

Supervised mode: 1 of 4 steps

Supervised mode : 2 of 4 steps

Supervised mode : 3 of 4 steps

Crowdsourcing "is the practice of obtaining needed services, ideas, or content by soliciting contributions from a large group of people and especially from the online community rather than from traditional employees or suppliers. […] Crowdsourcing is different from an ordinary outsourcing since it is a task or problem that is outsourced to an undefined public rather than a specific body." source:

Supervised mode : 4 of 4 steps

First: select languages

Second: select parameters

Stemming Process that removes common ending from words by English Porter algorithm electric¦al = electric electric¦ity = electric electron¦ics = electron

Third: check variants

Second: check variants

Editing

Checking: IPC

Supervised mode: results

Search examples: clothes for sport Entering “sports clothing” in the Simple search interface will return 168 results Entering “sports clothing” in the CLIR interface (in automatic mode) will return 5,449 results Entering “sports clothing” in the CLIR interface (in supervised mode) will return 1,023 results

Why use CLIR? A)Search full text collections simultaneously in many foreign languages B)Improve significantly the number of relevant results without increasing significantly the number of irrelevant results 485 results in English titles or abstracts for “sports clothing” 575 results obtained with CLIR searching in titles or abstracts in all languages C)Have confidence in your searches: No black box: users have access to the CLIR generated Boolean queries (albeit complex) and have the full control on them D)Have a responsive system even for complex queries

Golden rules Expansion modes Keyword very specific with only 1 meaning AUTO For any other queries, SUPERVISED is recommended Variants/synonyms Select words that you would like to appear in your search results If you have too much noise in the result list, remove generic variant

Golden rules Parameters 1. Title and abstract: unconstrained distance 2. Claims: sentence/paragraph distance 3. Description: sentence/paragraph distance Stemming recommended

Technicalities Compilation of a long list of titles in language pairs Creation of in-house extraction methodology Tool learns statistical bilingual dictionaries of titles EN FR ZH DE KO ES

Technicalities Quality of dictionaries: no human intervention The more title available, the better the coverage ChineseKoreanDutch EnglishPortugueseItalian FrenchRussianSwedish GermanSpanish Japanese

Technicalities Disambiguation: process of identifying the sense of a word in a sentence. Disambiguation is applied to keywords: 1.Technical domains based on the IPC 2.Synonyms selection

Future plans Improve terminology coverage of already supported languages Add other languages: over 200’000 titles and abstracts with associated high quality translations in English

Slides and recording +

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