Introduction to Information Retrieval
Introduction to Information Retrieval
Introduction to Information Retrieval
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Introduction</strong> <strong>to</strong> <strong>Information</strong> <strong>Retrieval</strong><br />
Desired weight for rare terms<br />
• Rare terms are more informative than frequent terms.<br />
• Consider a term in the query that is rare in the collection<br />
(e.g., ARACHNOCENTRIC).<br />
• A document containing this term is very likely <strong>to</strong> be<br />
relevant.<br />
• → We want high weights for rare terms like<br />
ARACHNOCENTRIC.<br />
20