Indexer
• Select terms (keywords) to index a document
–need co-operation from authors of webpage through Meta tags (next to
Title tag in html files) to indicate specific terms to index
<META name="keywords" content=“retrieval, sensor net, cloudcomp”>
• Algorithmic issues:
–How to choose terms/phrases to index documents, such that user
queries can be returned accurately and efficiently
–How to index documents encoded in different types (multimedia data
retrieval)
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