G.
Marchionini, UNC-CH
Approaches to Text Retrieval
1. Surrogate
Search: Search a set of predefined words that point to related documents.
Requires indexing via some controlled vocabulary.
pros: natural transition
from paper systems
cons: limited access;
human indexing required
2. Full-Text Search:
Search every word in every document.
pros: broaden access;
possible to automate indexing
cons: words rather than
concepts
3.
Knowledge-Based Search: Search a set of concepts that are related to concepts in documents.
pros: improved
retrieval
cons: computationally
expensive; theoretical at present