[DOCS] Reformat `stemmer` token filter (#55693)
Makes the following changes to the `stemmer` token filter docs: * Adds detailed analyze example * Rewrites parameter definitions * Adds custom analyzer example * Adds a `language` value for the `estonian` stemmer * Reorders the `language` values to show recommended algorithms first, followed by other values alphabetically
This commit is contained in:
James Rodewig
GitHub
parent
96285b90c1
commit
e0a8adb5b2
|
|
@ -4,17 +4,258 @@
|
||||||
<titleabbrev>Stemmer</titleabbrev>
|
<titleabbrev>Stemmer</titleabbrev>
|
||||||
++++
|
++++
|
||||||
|
|
||||||
// Adds attribute for the 'minimal_portuguese' stemmer values link.
|
Provides <<algorithmic-stemmers,algorithmic stemming>> for several languages,
|
||||||
// This link contains ~, which is converted to subscript.
|
some with additional variants. For a list of supported languages, see the
|
||||||
// This attribute prevents that substitution.
|
<<analysis-stemmer-tokenfilter-language-parm,`language`>> parameter.
|
||||||
// See https://github.com/asciidoctor/asciidoctor/wiki/How-to-prevent-URLs-containing-formatting-characters-from-getting-mangled
|
|
||||||
:min-pt-stemmer-values-url: http://www.inf.ufrgs.br/~buriol/papers/Orengo_CLEF07.pdf
|
|
||||||
|
|
||||||
A filter that provides access to (almost) all of the available stemming token
|
When not customized, the filter uses the
|
||||||
filters through a single unified interface. For example:
|
http://snowball.tartarus.org/algorithms/porter/stemmer.html[porter stemming
|
||||||
|
algorithm] for English.
|
||||||
|
|
||||||
|
[[analysis-stemmer-graph-tokenfilter-analyze-ex]]
|
||||||
|
==== Example
|
||||||
|
|
||||||
|
The following analyze API request uses the `stemmer` filter's default porter
|
||||||
|
stemming algorithm to stem `the foxes jumping quickly` to `the fox jump
|
||||||
|
quickli`:
|
||||||
|
|
||||||
[source,console]
|
[source,console]
|
||||||
--------------------------------------------------
|
----
|
||||||
|
GET /_analyze
|
||||||
|
{
|
||||||
|
"tokenizer": "standard",
|
||||||
|
"filter": [ "stemmer" ],
|
||||||
|
"text": "the foxes jumping quickly"
|
||||||
|
}
|
||||||
|
----
|
||||||
|
|
||||||
|
The filter produces the following tokens:
|
||||||
|
|
||||||
|
[source,text]
|
||||||
|
----
|
||||||
|
[ the, fox, jump, quickli ]
|
||||||
|
----
|
||||||
|
|
||||||
|
////
|
||||||
|
[source,console-result]
|
||||||
|
----
|
||||||
|
{
|
||||||
|
"tokens": [
|
||||||
|
{
|
||||||
|
"token": "the",
|
||||||
|
"start_offset": 0,
|
||||||
|
"end_offset": 3,
|
||||||
|
"type": "<ALPHANUM>",
|
||||||
|
"position": 0
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"token": "fox",
|
||||||
|
"start_offset": 4,
|
||||||
|
"end_offset": 9,
|
||||||
|
"type": "<ALPHANUM>",
|
||||||
|
"position": 1
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"token": "jump",
|
||||||
|
"start_offset": 10,
|
||||||
|
"end_offset": 17,
|
||||||
|
"type": "<ALPHANUM>",
|
||||||
|
"position": 2
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"token": "quickli",
|
||||||
|
"start_offset": 18,
|
||||||
|
"end_offset": 25,
|
||||||
|
"type": "<ALPHANUM>",
|
||||||
|
"position": 3
|
||||||
|
}
|
||||||
|
]
|
||||||
|
}
|
||||||
|
----
|
||||||
|
////
|
||||||
|
|
||||||
|
[[analysis-stemmer-tokenfilter-analyzer-ex]]
|
||||||
|
==== Add to an analyzer
|
||||||
|
|
||||||
|
The following <<indices-create-index,create index API>> request uses the
|
||||||
|
`stemmer` filter to configure a new <<analysis-custom-analyzer,custom
|
||||||
|
analyzer>>.
|
||||||
|
|
||||||
|
[source,console]
|
||||||
|
----
|
||||||
|
PUT /my_index
|
||||||
|
{
|
||||||
|
"settings": {
|
||||||
|
"analysis": {
|
||||||
|
"analyzer": {
|
||||||
|
"my_analyzer": {
|
||||||
|
"tokenizer": "whitespace",
|
||||||
|
"filter": [ "stemmer" ]
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
----
|
||||||
|
|
||||||
|
[role="child_attributes"]
|
||||||
|
[[analysis-stemmer-tokenfilter-configure-parms]]
|
||||||
|
==== Configurable parameters
|
||||||
|
|
||||||
|
[[analysis-stemmer-tokenfilter-language-parm]]
|
||||||
|
`language`::
|
||||||
|
(Optional, string)
|
||||||
|
Language-dependent stemming algorithm used to stem tokens. If both this and the
|
||||||
|
`name` parameter are specified, the `language` parameter argument is used.
|
||||||
|
+
|
||||||
|
[%collapsible%open]
|
||||||
|
.Valid values for `language`
|
||||||
|
====
|
||||||
|
Valid values are sorted by language. Defaults to
|
||||||
|
http://snowball.tartarus.org/algorithms/porter/stemmer.html[*`english`*].
|
||||||
|
Recommended algorithms are *bolded*.
|
||||||
|
|
||||||
|
Arabic::
|
||||||
|
{lucene-analysis-docs}/ar/ArabicStemmer.html[*`arabic`*]
|
||||||
|
|
||||||
|
Armenian::
|
||||||
|
http://snowball.tartarus.org/algorithms/armenian/stemmer.html[*`armenian`*]
|
||||||
|
|
||||||
|
Basque::
|
||||||
|
http://snowball.tartarus.org/algorithms/basque/stemmer.html[*`basque`*]
|
||||||
|
|
||||||
|
Bengali::
|
||||||
|
http://www.tandfonline.com/doi/abs/10.1080/02564602.1993.11437284[*`bengali`*]
|
||||||
|
|
||||||
|
Brazilian Portuguese::
|
||||||
|
{lucene-analysis-docs}/br/BrazilianStemmer.html[*`brazilian`*]
|
||||||
|
|
||||||
|
Bulgarian::
|
||||||
|
http://members.unine.ch/jacques.savoy/Papers/BUIR.pdf[*`bulgarian`*]
|
||||||
|
|
||||||
|
Catalan::
|
||||||
|
http://snowball.tartarus.org/algorithms/catalan/stemmer.html[*`catalan`*]
|
||||||
|
|
||||||
|
Czech::
|
||||||
|
http://portal.acm.org/citation.cfm?id=1598600[*`czech`*]
|
||||||
|
|
||||||
|
Danish::
|
||||||
|
http://snowball.tartarus.org/algorithms/danish/stemmer.html[*`danish`*]
|
||||||
|
|
||||||
|
Dutch::
|
||||||
|
http://snowball.tartarus.org/algorithms/dutch/stemmer.html[*`dutch`*],
|
||||||
|
http://snowball.tartarus.org/algorithms/kraaij_pohlmann/stemmer.html[`dutch_kp`]
|
||||||
|
|
||||||
|
English::
|
||||||
|
http://snowball.tartarus.org/algorithms/porter/stemmer.html[*`english`*],
|
||||||
|
http://ciir.cs.umass.edu/pubfiles/ir-35.pdf[`light_english`],
|
||||||
|
http://snowball.tartarus.org/algorithms/lovins/stemmer.html[`lovins`],
|
||||||
|
http://www.researchgate.net/publication/220433848_How_effective_is_suffixing[`minimal_english`],
|
||||||
|
http://snowball.tartarus.org/algorithms/english/stemmer.html[`porter2`],
|
||||||
|
{lucene-analysis-docs}/en/EnglishPossessiveFilter.html[`possessive_english`]
|
||||||
|
|
||||||
|
Estonian::
|
||||||
|
https://lucene.apache.org/core/{lucene_version_path}/analyzers-common/org/tartarus/snowball/ext/EstonianStemmer.html[*`estonian`*]
|
||||||
|
|
||||||
|
Finnish::
|
||||||
|
http://snowball.tartarus.org/algorithms/finnish/stemmer.html[*`finnish`*],
|
||||||
|
http://clef.isti.cnr.it/2003/WN_web/22.pdf[`light_finnish`]
|
||||||
|
|
||||||
|
French::
|
||||||
|
http://dl.acm.org/citation.cfm?id=1141523[*`light_french`*],
|
||||||
|
http://snowball.tartarus.org/algorithms/french/stemmer.html[`french`],
|
||||||
|
http://dl.acm.org/citation.cfm?id=318984[`minimal_french`]
|
||||||
|
|
||||||
|
Galician::
|
||||||
|
http://bvg.udc.es/recursos_lingua/stemming.jsp[*`galician`*],
|
||||||
|
http://bvg.udc.es/recursos_lingua/stemming.jsp[`minimal_galician`] (Plural step only)
|
||||||
|
|
||||||
|
German::
|
||||||
|
http://dl.acm.org/citation.cfm?id=1141523[*`light_german`*],
|
||||||
|
http://snowball.tartarus.org/algorithms/german/stemmer.html[`german`],
|
||||||
|
http://snowball.tartarus.org/algorithms/german2/stemmer.html[`german2`],
|
||||||
|
http://members.unine.ch/jacques.savoy/clef/morpho.pdf[`minimal_german`]
|
||||||
|
|
||||||
|
Greek::
|
||||||
|
http://sais.se/mthprize/2007/ntais2007.pdf[*`greek`*]
|
||||||
|
|
||||||
|
Hindi::
|
||||||
|
http://computing.open.ac.uk/Sites/EACLSouthAsia/Papers/p6-Ramanathan.pdf[*`hindi`*]
|
||||||
|
|
||||||
|
Hungarian::
|
||||||
|
http://snowball.tartarus.org/algorithms/hungarian/stemmer.html[*`hungarian`*],
|
||||||
|
http://dl.acm.org/citation.cfm?id=1141523&dl=ACM&coll=DL&CFID=179095584&CFTOKEN=80067181[`light_hungarian`]
|
||||||
|
|
||||||
|
Indonesian::
|
||||||
|
http://www.illc.uva.nl/Publications/ResearchReports/MoL-2003-02.text.pdf[*`indonesian`*]
|
||||||
|
|
||||||
|
Irish::
|
||||||
|
http://snowball.tartarus.org/otherapps/oregan/intro.html[*`irish`*]
|
||||||
|
|
||||||
|
Italian::
|
||||||
|
http://www.ercim.eu/publication/ws-proceedings/CLEF2/savoy.pdf[*`light_italian`*],
|
||||||
|
http://snowball.tartarus.org/algorithms/italian/stemmer.html[`italian`]
|
||||||
|
|
||||||
|
Kurdish (Sorani)::
|
||||||
|
{lucene-analysis-docs}/ckb/SoraniStemmer.html[*`sorani`*]
|
||||||
|
|
||||||
|
Latvian::
|
||||||
|
{lucene-analysis-docs}/lv/LatvianStemmer.html[*`latvian`*]
|
||||||
|
|
||||||
|
Lithuanian::
|
||||||
|
http://svn.apache.org/viewvc/lucene/dev/branches/lucene_solr_5_3/lucene/analysis/common/src/java/org/apache/lucene/analysis/lt/stem_ISO_8859_1.sbl?view=markup[*`lithuanian`*]
|
||||||
|
|
||||||
|
Norwegian (Bokmål)::
|
||||||
|
http://snowball.tartarus.org/algorithms/norwegian/stemmer.html[*`norwegian`*],
|
||||||
|
{lucene-analysis-docs}/no/NorwegianLightStemmer.html[*`light_norwegian`*],
|
||||||
|
{lucene-analysis-docs}/no/NorwegianMinimalStemmer.html[`minimal_norwegian`]
|
||||||
|
|
||||||
|
Norwegian (Nynorsk)::
|
||||||
|
{lucene-analysis-docs}/no/NorwegianLightStemmer.html[*`light_nynorsk`*],
|
||||||
|
{lucene-analysis-docs}/no/NorwegianMinimalStemmer.html[`minimal_nynorsk`]
|
||||||
|
|
||||||
|
Portuguese::
|
||||||
|
http://dl.acm.org/citation.cfm?id=1141523&dl=ACM&coll=DL&CFID=179095584&CFTOKEN=80067181[*`light_portuguese`*],
|
||||||
|
pass:macros[http://www.inf.ufrgs.br/~buriol/papers/Orengo_CLEF07.pdf[`minimal_portuguese`\]],
|
||||||
|
http://snowball.tartarus.org/algorithms/portuguese/stemmer.html[`portuguese`],
|
||||||
|
http://www.inf.ufrgs.br/\~viviane/rslp/index.htm[`portuguese_rslp`]
|
||||||
|
|
||||||
|
Romanian::
|
||||||
|
http://snowball.tartarus.org/algorithms/romanian/stemmer.html[*`romanian`*]
|
||||||
|
|
||||||
|
Russian::
|
||||||
|
http://snowball.tartarus.org/algorithms/russian/stemmer.html[*`russian`*],
|
||||||
|
http://doc.rero.ch/lm.php?url=1000%2C43%2C4%2C20091209094227-CA%2FDolamic_Ljiljana_-_Indexing_and_Searching_Strategies_for_the_Russian_20091209.pdf[`light_russian`]
|
||||||
|
|
||||||
|
Spanish::
|
||||||
|
http://www.ercim.eu/publication/ws-proceedings/CLEF2/savoy.pdf[*`light_spanish`*],
|
||||||
|
http://snowball.tartarus.org/algorithms/spanish/stemmer.html[`spanish`]
|
||||||
|
|
||||||
|
Swedish::
|
||||||
|
http://snowball.tartarus.org/algorithms/swedish/stemmer.html[*`swedish`*],
|
||||||
|
http://clef.isti.cnr.it/2003/WN_web/22.pdf[`light_swedish`]
|
||||||
|
|
||||||
|
Turkish::
|
||||||
|
http://snowball.tartarus.org/algorithms/turkish/stemmer.html[*`turkish`*]
|
||||||
|
====
|
||||||
|
|
||||||
|
`name`::
|
||||||
|
An alias for the <<analysis-stemmer-tokenfilter-language-parm,`language`>>
|
||||||
|
parameter. If both this and the `language` parameter are specified, the
|
||||||
|
`language` parameter argument is used.
|
||||||
|
|
||||||
|
[[analysis-stemmer-tokenfilter-customize]]
|
||||||
|
==== Customize
|
||||||
|
|
||||||
|
To customize the `stemmer` filter, duplicate it to create the basis for a new
|
||||||
|
custom token filter. You can modify the filter using its configurable
|
||||||
|
parameters.
|
||||||
|
|
||||||
|
For example, the following request creates a custom `stemmer` filter that stems
|
||||||
|
words using the `light_german` algorithm:
|
||||||
|
|
||||||
|
[source,console]
|
||||||
|
----
|
||||||
PUT /my_index
|
PUT /my_index
|
||||||
{
|
{
|
||||||
"settings": {
|
"settings": {
|
||||||
|
|
@ -22,171 +263,19 @@ PUT /my_index
|
||||||
"analyzer": {
|
"analyzer": {
|
||||||
"my_analyzer": {
|
"my_analyzer": {
|
||||||
"tokenizer": "standard",
|
"tokenizer": "standard",
|
||||||
"filter" : ["lowercase", "my_stemmer"]
|
"filter": [
|
||||||
|
"lowercase",
|
||||||
|
"my_stemmer"
|
||||||
|
]
|
||||||
}
|
}
|
||||||
},
|
},
|
||||||
"filter": {
|
"filter": {
|
||||||
"my_stemmer": {
|
"my_stemmer": {
|
||||||
"type": "stemmer",
|
"type": "stemmer",
|
||||||
"name" : "light_german"
|
"language": "light_german"
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
--------------------------------------------------
|
----
|
||||||
|
|
||||||
The `language`/`name` parameter controls the stemmer with the following
|
|
||||||
available values (the preferred filters are marked in *bold*):
|
|
||||||
|
|
||||||
[horizontal]
|
|
||||||
Arabic::
|
|
||||||
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/ar/ArabicStemmer.html[*`arabic`*]
|
|
||||||
|
|
||||||
Armenian::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/armenian/stemmer.html[*`armenian`*]
|
|
||||||
|
|
||||||
Basque::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/basque/stemmer.html[*`basque`*]
|
|
||||||
|
|
||||||
Bengali::
|
|
||||||
http://www.tandfonline.com/doi/abs/10.1080/02564602.1993.11437284[*`bengali`*]
|
|
||||||
|
|
||||||
Brazilian Portuguese::
|
|
||||||
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/br/BrazilianStemmer.html[*`brazilian`*]
|
|
||||||
|
|
||||||
Bulgarian::
|
|
||||||
|
|
||||||
http://members.unine.ch/jacques.savoy/Papers/BUIR.pdf[*`bulgarian`*]
|
|
||||||
|
|
||||||
Catalan::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/catalan/stemmer.html[*`catalan`*]
|
|
||||||
|
|
||||||
Czech::
|
|
||||||
|
|
||||||
http://portal.acm.org/citation.cfm?id=1598600[*`czech`*]
|
|
||||||
|
|
||||||
Danish::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/danish/stemmer.html[*`danish`*]
|
|
||||||
|
|
||||||
Dutch::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/dutch/stemmer.html[*`dutch`*],
|
|
||||||
http://snowball.tartarus.org/algorithms/kraaij_pohlmann/stemmer.html[`dutch_kp`]
|
|
||||||
|
|
||||||
English::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/porter/stemmer.html[*`english`*],
|
|
||||||
http://ciir.cs.umass.edu/pubfiles/ir-35.pdf[`light_english`],
|
|
||||||
http://www.researchgate.net/publication/220433848_How_effective_is_suffixing[`minimal_english`],
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/en/EnglishPossessiveFilter.html[`possessive_english`],
|
|
||||||
http://snowball.tartarus.org/algorithms/english/stemmer.html[`porter2`],
|
|
||||||
http://snowball.tartarus.org/algorithms/lovins/stemmer.html[`lovins`]
|
|
||||||
|
|
||||||
Finnish::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/finnish/stemmer.html[*`finnish`*],
|
|
||||||
http://clef.isti.cnr.it/2003/WN_web/22.pdf[`light_finnish`]
|
|
||||||
|
|
||||||
French::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/french/stemmer.html[`french`],
|
|
||||||
http://dl.acm.org/citation.cfm?id=1141523[*`light_french`*],
|
|
||||||
http://dl.acm.org/citation.cfm?id=318984[`minimal_french`]
|
|
||||||
|
|
||||||
Galician::
|
|
||||||
|
|
||||||
http://bvg.udc.es/recursos_lingua/stemming.jsp[*`galician`*],
|
|
||||||
http://bvg.udc.es/recursos_lingua/stemming.jsp[`minimal_galician`] (Plural step only)
|
|
||||||
|
|
||||||
German::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/german/stemmer.html[`german`],
|
|
||||||
http://snowball.tartarus.org/algorithms/german2/stemmer.html[`german2`],
|
|
||||||
http://dl.acm.org/citation.cfm?id=1141523[*`light_german`*],
|
|
||||||
http://members.unine.ch/jacques.savoy/clef/morpho.pdf[`minimal_german`]
|
|
||||||
|
|
||||||
Greek::
|
|
||||||
|
|
||||||
http://sais.se/mthprize/2007/ntais2007.pdf[*`greek`*]
|
|
||||||
|
|
||||||
Hindi::
|
|
||||||
|
|
||||||
http://computing.open.ac.uk/Sites/EACLSouthAsia/Papers/p6-Ramanathan.pdf[*`hindi`*]
|
|
||||||
|
|
||||||
Hungarian::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/hungarian/stemmer.html[*`hungarian`*],
|
|
||||||
http://dl.acm.org/citation.cfm?id=1141523&dl=ACM&coll=DL&CFID=179095584&CFTOKEN=80067181[`light_hungarian`]
|
|
||||||
|
|
||||||
Indonesian::
|
|
||||||
|
|
||||||
http://www.illc.uva.nl/Publications/ResearchReports/MoL-2003-02.text.pdf[*`indonesian`*]
|
|
||||||
|
|
||||||
Irish::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/otherapps/oregan/intro.html[*`irish`*]
|
|
||||||
|
|
||||||
Italian::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/italian/stemmer.html[`italian`],
|
|
||||||
http://www.ercim.eu/publication/ws-proceedings/CLEF2/savoy.pdf[*`light_italian`*]
|
|
||||||
|
|
||||||
Kurdish (Sorani)::
|
|
||||||
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/ckb/SoraniStemmer.html[*`sorani`*]
|
|
||||||
|
|
||||||
Latvian::
|
|
||||||
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/lv/LatvianStemmer.html[*`latvian`*]
|
|
||||||
|
|
||||||
Lithuanian::
|
|
||||||
|
|
||||||
http://svn.apache.org/viewvc/lucene/dev/branches/lucene_solr_5_3/lucene/analysis/common/src/java/org/apache/lucene/analysis/lt/stem_ISO_8859_1.sbl?view=markup[*`lithuanian`*]
|
|
||||||
|
|
||||||
Norwegian (Bokmål)::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/norwegian/stemmer.html[*`norwegian`*],
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/no/NorwegianLightStemmer.html[*`light_norwegian`*],
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/no/NorwegianMinimalStemmer.html[`minimal_norwegian`]
|
|
||||||
|
|
||||||
Norwegian (Nynorsk)::
|
|
||||||
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/no/NorwegianLightStemmer.html[*`light_nynorsk`*],
|
|
||||||
http://lucene.apache.org/core/4_9_0/analyzers-common/org/apache/lucene/analysis/no/NorwegianMinimalStemmer.html[`minimal_nynorsk`]
|
|
||||||
|
|
||||||
Portuguese::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/portuguese/stemmer.html[`portuguese`],
|
|
||||||
http://dl.acm.org/citation.cfm?id=1141523&dl=ACM&coll=DL&CFID=179095584&CFTOKEN=80067181[*`light_portuguese`*],
|
|
||||||
{min-pt-stemmer-values-url}[`minimal_portuguese`],
|
|
||||||
http://www.inf.ufrgs.br/\~viviane/rslp/index.htm[`portuguese_rslp`]
|
|
||||||
|
|
||||||
Romanian::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/romanian/stemmer.html[*`romanian`*]
|
|
||||||
|
|
||||||
Russian::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/russian/stemmer.html[*`russian`*],
|
|
||||||
http://doc.rero.ch/lm.php?url=1000%2C43%2C4%2C20091209094227-CA%2FDolamic_Ljiljana_-_Indexing_and_Searching_Strategies_for_the_Russian_20091209.pdf[`light_russian`]
|
|
||||||
|
|
||||||
Spanish::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/spanish/stemmer.html[`spanish`],
|
|
||||||
http://www.ercim.eu/publication/ws-proceedings/CLEF2/savoy.pdf[*`light_spanish`*]
|
|
||||||
|
|
||||||
Swedish::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/swedish/stemmer.html[*`swedish`*],
|
|
||||||
http://clef.isti.cnr.it/2003/WN_web/22.pdf[`light_swedish`]
|
|
||||||
|
|
||||||
Turkish::
|
|
||||||
|
|
||||||
http://snowball.tartarus.org/algorithms/turkish/stemmer.html[*`turkish`*]
|
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue