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Provost: Chapter 10 (measuring spareness: inverse document frequency (not…
Provost: Chapter 10
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why is text important?
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needed to truly understand, lots of important detailed info in it
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why text is difficult
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dirty
error, different meanings, punctuation
representation
use least expensive, most simple
terminology
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document
a piece of text, no matter how large or small
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beyond bag of words
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named entity extraction
recognizes titles, annotated titles
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