Download - The PATENTSCOPE search system: CLIR
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The PATENTSCOPE search system: CLIR
February 2013
Sandrine Ammann
Marketing & Communications Officer
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To the PATENTSCOPE search system webinar
CLIR
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Agenda
CLIR
Definition
History
Search with CLIR
Usefulness
Golden rules
Technicalities
Q & A session
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CLIR
Cross-Lingual Information Retrieval
Finds synonyms in different domains
Translates those found synonyms + original query into different languages
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CLIR – 12 languages available
NON-ASIAN
Dutch
English
French
German
Italian
Portuguese
Russian
Spanish
Swedish
ASIAN
Chinese
Japanese
Korean
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History
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History
Lower language barriers in patent search
First language tool developed in-house
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CLIR: the interface
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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.
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CLIR: precision vs recall
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Example: precision
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Example: recall
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Example: ARM
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CHIP
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CLIR: supervised mode
2 modes: automatic and supervised
Automatic: 1 step
Supervised: 4 steps
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Cross-Lingual Expansion (CLIR)
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Result : the query from “container” to:
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Supervised mode: 1 of 4 steps
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Supervised mode : 2 of 4 steps
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Supervised mode : 3 of 4 steps
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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:
http://en.wikipedia.org/wiki/Crowdsourcing
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Supervised mode : 4 of 4 steps
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First: select languages
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Second: select parameters
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Stemming
Process that removes common ending from words by English Porter algorithm
electric¦al = electric
electric¦ity = electric
electron¦ics = electron
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Third: check variants
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Second: check variants
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Editing
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Checking: IPC
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Supervised mode: results
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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
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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
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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
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Golden rules
Parameters
1. Title and abstract: unconstrained distance
2. Claims: sentence/paragraph distance
3. Description: sentence/paragraph distance
Stemming recommended
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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
KOES
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Technicalities
Quality of dictionaries: no human intervention
The more title available, the better the coverage
Chinese Korean Dutch
English Portuguese Italian
French Russian Swedish
German Spanish
Japanese
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Technicalities
Disambiguation: process of identifying the sense of a word in a sentence. http://en.wikipedia.org/wiki/Disambiguation_%28disambiguation%29
Disambiguation is applied to keywords:
1. Technical domains based on the IPC
2. Synonyms selection
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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
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Slides and recording
www.wipo.int/patentscope/en/webinar/index.html
+
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