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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
A list of mapping rules to use.
A path (either relative to
Here is an example:
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