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[[analysis-stemmer-override-tokenfilter]]
=== Stemmer Override Token Filter
Overrides stemming algorithms, by applying a custom mapping, then
protecting these terms from being modified by stemmers. Must be placed
before any stemming filters.
Rules are separated by "=>"
[cols="<,<",options="header",]
|=======================================================================
|Setting |Description
|`rules` |A list of mapping rules to use.
|`rules_path` |A path (either relative to `config` location, or
absolute) to a list of mappings.
|=======================================================================
Here is an example:
[source,js]
--------------------------------------------------
index :
analysis :
analyzer :
myAnalyzer :
type : custom
tokenizer : standard
filter : [lowercase, custom_stems, porter_stem]
filter:
custom_stems:
type: stemmer_override
rules_path : analysis/custom_stems.txt
--------------------------------------------------
|
