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Update keyword-repeat-tokenfilter.asciidoc
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clintongormley committed Apr 24, 2014
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=== Keyword Repeat Token Filter

The `keyword_repeat` token filter Emits each incoming token twice once
as keyword and once as a non-keyword to allow an un-stemmed version of a
term to be indexed side by site to the stemmed version of the term.
as keyword and once as a non-keyword to allow an unstemmed version of a
term to be indexed side by side with the stemmed version of the term.
Given the nature of this filter each token that isn't transformed by a
subsequent stemmer will be indexed twice. Therefore, consider adding a
`unique` filter with `only_on_same_position` set to `true` to drop
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