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* All terms are equally weighted
* More like ''[[data retrieval]]'' than ''information retrieval''
* Retrieval based on binary decision criteria with no notion of partial matching
* No ranking of the documents is provided (absence of a grading scale)
* Information need has to be translated into a Boolean expression, which most users find
awkward
* The Boolean queries formulated by the users are most often too simplistic
* The model frequently returns either too few or too many documents in response to a user
query
== Data structures and algorithms ==
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