Re: Russian stemmer
All of your examples stem to ковров:
assertAnalyzesTo(a, Коврова Коврову Ковровом Коврове,
new String[] { ковров, ковров, ковров, ковров });
}
Are you sure you enabled this at *both* index and query time?
2010/7/27 Oleg Burlaca o...@burlaca.com
Hello,
I'm using SnowballPorterFilterFactory with language=Russian.
The stemming works ok except people names, geographical places.
Here are some examples:
searching for Ковров should also find Коврова, Коврову, Ковровом, Коврове.
Are there other stemming plugins for the russian language that can handle
this?
If not, what are the options. A simple solution may be to use the wildcard
queries in Standard mode instead of the DisMaxQueryHandler:
Ковров*
but I'd like to avoid it.
Thanks.
--
Robert Muir
rcm...@gmail.com
Re: Russian stemmer
another look, your problem is ковров itself... its mapped to ковр
a workaround might be to use the protected words functionality to
keep ковров and any other problematic people/geo names as-is.
separately, in trunk there is an alternative russian stemmer
(RussianLightStemFilterFactory), which might give you less problems on
average, but I noticed it has this same problem with the example you gave.
On Tue, Jul 27, 2010 at 4:25 AM, Robert Muir rcm...@gmail.com wrote:
All of your examples stem to ковров:
assertAnalyzesTo(a, Коврова Коврову Ковровом Коврове,
new String[] { ковров, ковров, ковров, ковров });
}
Are you sure you enabled this at *both* index and query time?
2010/7/27 Oleg Burlaca o...@burlaca.com
Hello,
I'm using SnowballPorterFilterFactory with language=Russian.
The stemming works ok except people names, geographical places.
Here are some examples:
searching for Ковров should also find Коврова, Коврову, Ковровом, Коврове.
Are there other stemming plugins for the russian language that can handle
this?
If not, what are the options. A simple solution may be to use the wildcard
queries in Standard mode instead of the DisMaxQueryHandler:
Ковров*
but I'd like to avoid it.
Thanks.
--
Robert Muir
rcm...@gmail.com
--
Robert Muir
rcm...@gmail.com
Re: Russian stemmer
Yes, I'm sure I've enabled SnowballPorterFilterFactory both at Index and
Query time, because the search works ok,
except names and geo locations.
I've noticed that searching by
Коврова
also shows documents that contain Коврову, Коврове
Search by Ковров, 7 results:
http://www.sova-center.ru/search/?q=%D0%BA%D0%BE%D0%B2%D1%80%D0%BE%D0%B2
Search by Коврова, 26 results:
http://www.sova-center.ru/search/?lg=1q=%D0%BA%D0%BE%D0%B2%D1%80%D0%BE%D0%B2%D0%B0
Adding such words in stopwords.txt will be a tedious task, as there are 7
millions russian names :)
Kind Regards,
Oleg Burlaca
On Tue, Jul 27, 2010 at 11:35 AM, Robert Muir rcm...@gmail.com wrote:
another look, your problem is ковров itself... its mapped to ковр
a workaround might be to use the protected words functionality to
keep ковров and any other problematic people/geo names as-is.
separately, in trunk there is an alternative russian stemmer
(RussianLightStemFilterFactory), which might give you less problems on
average, but I noticed it has this same problem with the example you gave.
On Tue, Jul 27, 2010 at 4:25 AM, Robert Muir rcm...@gmail.com wrote:
All of your examples stem to ковров:
assertAnalyzesTo(a, Коврова Коврову Ковровом Коврове,
new String[] { ковров, ковров, ковров, ковров });
}
Are you sure you enabled this at *both* index and query time?
2010/7/27 Oleg Burlaca o...@burlaca.com
Hello,
I'm using SnowballPorterFilterFactory with language=Russian.
The stemming works ok except people names, geographical places.
Here are some examples:
searching for Ковров should also find Коврова, Коврову, Ковровом,
Коврове.
Are there other stemming plugins for the russian language that can
handle
this?
If not, what are the options. A simple solution may be to use the
wildcard
queries in Standard mode instead of the DisMaxQueryHandler:
Ковров*
but I'd like to avoid it.
Thanks.
--
Robert Muir
rcm...@gmail.com
--
Robert Muir
rcm...@gmail.com
Re: Russian stemmer
A similar word is Немцов. The strange thing is that searching for Немцова will not find documents containing Немцов Немцова: 14 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2%D0%B0 Немцов: 74 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2
Re: Russian stemmer
Actually the situation with Немцов из ок, I've just checked how Yandex works with Немцов and Немцова: http://nano.yandex.ru/project/inflect/ I think there are two solutions: a) manually search for both Немцов and then Немцова b) use wildcard query: Немцов* Robert, thanks for the RussianLightStemFilterFactory info, I've found this page http://www.mail-archive.com/solr-comm...@lucene.apache.org/msg06857.html that somehow describes it. Where can I read more about RussianLightStemFilterFactory ? Regards, Oleg 2010/7/27 Oleg Burlaca o...@burlaca.com A similar word is Немцов. The strange thing is that searching for Немцова will not find documents containing Немцов Немцова: 14 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2%D0%B0 Немцов: 74 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2
Re: Russian stemmer
2010/7/27 Oleg Burlaca o...@burlaca.com Actually the situation with Немцов из ок, I've just checked how Yandex works with Немцов and Немцова: http://nano.yandex.ru/project/inflect/ I think there are two solutions: a) manually search for both Немцов and then Немцова b) use wildcard query: Немцов* Well, here is one idea of a more general solution. The problem with protected words is you must have a complete list. One idea would be to add a filter that protects any words from stemming that match a regular expression: In english maybe someone wants to avoid any capitalized words to reduce trouble: [A-Z].* in your case then some pattern like [A-Я].*ов might prevent problems. Robert, thanks for the RussianLightStemFilterFactory info, I've found this page http://www.mail-archive.com/solr-comm...@lucene.apache.org/msg06857.html that somehow describes it. Where can I read more about RussianLightStemFilterFactory ? Here is the link: http://doc.rero.ch/lm.php?url=1000,43,4,20091209094227-CA/Dolamic_Ljiljana_-_Indexing_and_Searching_Strategies_for_the_Russian_20091209.pdf Regards, Oleg 2010/7/27 Oleg Burlaca o...@burlaca.com A similar word is Немцов. The strange thing is that searching for Немцова will not find documents containing Немцов Немцова: 14 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2%D0%B0 Немцов: 74 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2 -- Robert Muir rcm...@gmail.com
Re: Russian stemmer
Thanks Robert for all your help, The idea of ы[A-Z].* stopwords is ideal for the english language, although in russian nouns are inflected: Борис, Борису, Бориса, Борисом I'll try the RussianLightStemFilterFactory (the article in the PDF mentioned it's more accurate). Once again thanks, Oleg Burlaca On Tue, Jul 27, 2010 at 12:07 PM, Robert Muir rcm...@gmail.com wrote: 2010/7/27 Oleg Burlaca o...@burlaca.com Actually the situation with Немцов из ок, I've just checked how Yandex works with Немцов and Немцова: http://nano.yandex.ru/project/inflect/ I think there are two solutions: a) manually search for both Немцов and then Немцова b) use wildcard query: Немцов* Well, here is one idea of a more general solution. The problem with protected words is you must have a complete list. One idea would be to add a filter that protects any words from stemming that match a regular expression: In english maybe someone wants to avoid any capitalized words to reduce trouble: [A-Z].* in your case then some pattern like [A-Я].*ов might prevent problems. Robert, thanks for the RussianLightStemFilterFactory info, I've found this page http://www.mail-archive.com/solr-comm...@lucene.apache.org/msg06857.html that somehow describes it. Where can I read more about RussianLightStemFilterFactory ? Here is the link: http://doc.rero.ch/lm.php?url=1000,43,4,20091209094227-CA/Dolamic_Ljiljana_-_Indexing_and_Searching_Strategies_for_the_Russian_20091209.pdf Regards, Oleg 2010/7/27 Oleg Burlaca o...@burlaca.com A similar word is Немцов. The strange thing is that searching for Немцова will not find documents containing Немцов Немцова: 14 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2%D0%B0 Немцов: 74 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2 -- Robert Muir rcm...@gmail.com
Re: Russian stemmer
right, but your problem is this is the current output: Ковров - Ковр Коврову - Ковров Ковровом - Ковров Коврове - Ковров so, if Ковров was simply left alone, all your forms would match... 2010/7/27 Oleg Burlaca o...@burlaca.com Thanks Robert for all your help, The idea of ы[A-Z].* stopwords is ideal for the english language, although in russian nouns are inflected: Борис, Борису, Бориса, Борисом I'll try the RussianLightStemFilterFactory (the article in the PDF mentioned it's more accurate). Once again thanks, Oleg Burlaca On Tue, Jul 27, 2010 at 12:07 PM, Robert Muir rcm...@gmail.com wrote: 2010/7/27 Oleg Burlaca o...@burlaca.com Actually the situation with Немцов из ок, I've just checked how Yandex works with Немцов and Немцова: http://nano.yandex.ru/project/inflect/ I think there are two solutions: a) manually search for both Немцов and then Немцова b) use wildcard query: Немцов* Well, here is one idea of a more general solution. The problem with protected words is you must have a complete list. One idea would be to add a filter that protects any words from stemming that match a regular expression: In english maybe someone wants to avoid any capitalized words to reduce trouble: [A-Z].* in your case then some pattern like [A-Я].*ов might prevent problems. Robert, thanks for the RussianLightStemFilterFactory info, I've found this page http://www.mail-archive.com/solr-comm...@lucene.apache.org/msg06857.html that somehow describes it. Where can I read more about RussianLightStemFilterFactory ? Here is the link: http://doc.rero.ch/lm.php?url=1000,43,4,20091209094227-CA/Dolamic_Ljiljana_-_Indexing_and_Searching_Strategies_for_the_Russian_20091209.pdf Regards, Oleg 2010/7/27 Oleg Burlaca o...@burlaca.com A similar word is Немцов. The strange thing is that searching for Немцова will not find documents containing Немцов Немцова: 14 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2%D0%B0 Немцов: 74 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2 -- Robert Muir rcm...@gmail.com -- Robert Muir rcm...@gmail.com
Re: Russian stemmer
I have studied some Russian. I kind of got the picture from the texts that all the exceptions had already been 'found', and were listed in the book. I do know that languages are living, changing organisms, but Russian has got to be more regular than English I would think, even WITH all six cases and 3 genders. Dennis Gearon Signature Warning EARTH has a Right To Life, otherwise we all die. Read 'Hot, Flat, and Crowded' Laugh at http://www.yert.com/film.php --- On Tue, 7/27/10, Robert Muir rcm...@gmail.com wrote: From: Robert Muir rcm...@gmail.com Subject: Re: Russian stemmer To: solr-user@lucene.apache.org Date: Tuesday, July 27, 2010, 7:12 AM right, but your problem is this is the current output: Ковров - Ковр Коврову - Ковров Ковровом - Ковров Коврове - Ковров so, if Ковров was simply left alone, all your forms would match... 2010/7/27 Oleg Burlaca o...@burlaca.com Thanks Robert for all your help, The idea of ы[A-Z].* stopwords is ideal for the english language, although in russian nouns are inflected: Борис, Борису, Бориса, Борисом I'll try the RussianLightStemFilterFactory (the article in the PDF mentioned it's more accurate). Once again thanks, Oleg Burlaca On Tue, Jul 27, 2010 at 12:07 PM, Robert Muir rcm...@gmail.com wrote: 2010/7/27 Oleg Burlaca o...@burlaca.com Actually the situation with Немцов из ок, I've just checked how Yandex works with Немцов and Немцова: http://nano.yandex.ru/project/inflect/ I think there are two solutions: a) manually search for both Немцов and then Немцова b) use wildcard query: Немцов* Well, here is one idea of a more general solution. The problem with protected words is you must have a complete list. One idea would be to add a filter that protects any words from stemming that match a regular expression: In english maybe someone wants to avoid any capitalized words to reduce trouble: [A-Z].* in your case then some pattern like [A-Я].*ов might prevent problems. Robert, thanks for the RussianLightStemFilterFactory info, I've found this page http://www.mail-archive.com/solr-comm...@lucene.apache.org/msg06857.html that somehow describes it. Where can I read more about RussianLightStemFilterFactory ? Here is the link: http://doc.rero.ch/lm.php?url=1000,43,4,20091209094227-CA/Dolamic_Ljiljana_-_Indexing_and_Searching_Strategies_for_the_Russian_20091209.pdf Regards, Oleg 2010/7/27 Oleg Burlaca o...@burlaca.com A similar word is Немцов. The strange thing is that searching for Немцова will not find documents containing Немцов Немцова: 14 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2%D0%B0 Немцов: 74 articles http://www.sova-center.ru/search/?lg=1q=%D0%BD%D0%B5%D0%BC%D1%86%D0%BE%D0%B2 -- Robert Muir rcm...@gmail.com -- Robert Muir rcm...@gmail.com
