January 2012
Intermediate to advanced
336 pages
11h 19m
English
Content preview from Express Learning: Database Management Systems
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15
Information Retrieval
1. What is information retrieval (IR)? Differentiate between database system and IR system.
Ans: The process of extracting information from unstructured textual data is referred to as information retrieval (IR). The process of information retrieval consists of locating relevant documents based on user inputs. The users of IR systems request to retrieve a particular set of documents by providing a set of words (keywords).
| Database System | IR System |
|---|---|
| Data in database system are rigidly structured and support searching based on a very general class of queries. | IR system deals with unstructured data and supports approximate searching based on the keywords. ... |
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