Increase accuracy in
your text analysis:
Differences between
Booleans and POS tagging
Booleans approach
Results
­ “I always book online.”
­ “I am reading my book online”
­ “I lost my book and now I cannot event find it online.”
­ “I book through the phone and only go online to
check prices.”
Keywords: book and online
Boolean: AND
Booleans approach
Results
­ “I always book online.”
­ “I am reading my book online”
­ “I lost my book and now I cannot event find it online.”
­ “I book through the phone and only go online to
check prices.”
Keywords: book and online
Boolean: NEAR/3
The two last sentences will be excluded from the results
Booleans approach
Results
­ “I always book online.”
­ “I am reading my book online”
­ “I lost my book and now I cannot event find it online.”
­ “I book through the phone and only go online to
check prices.” 
Included in your results
Excluded from your results
But if you were a hotel, would this be the result you were looking for?
NO
­Some results are missing
 ­There is unnecesary noise
POSes approach
Results
­ “I always book online.”
­ “I am reading my book online”
­ “I lost my book and now I cannot event find it online.”
­ “I book through the phone and only go online to check
prices.”
Book;sust
Book;verb
Online;adv
Online;sust
Rules
POSes approach
Results
­ “I always book online.”
­ “I book through the phone and only go online to check
prices.”
Book;verb,online;adv
Rules
POSes approach
Results
­ “I am reading my book online”
­ “I lost my book and now I cannot event find it online.” 
Book;sust,online;adv
Rules
Increase the accuracy of your analysis

Increase the accuracy of your analysis