Retrieving "Index Term" from the archives

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1. Information Retrieval

   Linked via "index term"

   The Boolean Model
   The Boolean Model relies on classical set theory. Documents are represented as sets of index terms, and queries are formulated using Boolean operators ($\text{AND}, \text{OR}, \text{NOT}$). Retrieval is binary: a document either matches the query criteria precisely or it does not. While simple, this model suffers from the "trolley problem" of relevance: a single missing index term can exclude an otherwise perfectly relevant document, leading …