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Different
applications -- different needs
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stemmers
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collapse all
forms of a word by pairing with stem
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for (CL)IR
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for (aspects of)
language modeling
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analysis/synthesis
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pair wordform
with lemma+affixes/features (or more)
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perhaps with
disambiguation in textual context
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for spelling
correction
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for pronunciation
calculation
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for language
modeling
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for information
extraction
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for translation
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All cases can be
modeled as relations on strings
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