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Information Storage and Retrieval Reena Kapoor, Lovely Professional University
Notes
Unit 10: Information Storage and Retrieval System
CONTENTS
Objectives
Introduction
10.1 Information Retrieval System Evaluation
10.2 Precision and Recall
10.3 Precision
10.4 Recall
10.5 Relevance
10.6 Online Searching Basics; Library Databases; Web Sites
10.7 Summary
10.8 Keywords
10.9 Review Questions
10.10 Further Readings
Objectives
After studying this unit, you will be able to:
• Define information storage and retrieval system
• Describe precision and recall
• Explain relevance
• Describe keywords searching and boolean operators.
Introduction
An information storage and retrieval system (ISRS) is a network with a built-in user interface that
facilitates the creation, searching, and modification of stored data. An ISRS is typically a peer-to-peer
(P2P) network operated and maintained by private individuals or independent organizations, but
accessible to the general public. Some, but not all, ISRSs can be accessed from the Internet.
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