April 2016
Beginner to intermediate
463 pages
18h 53m
English
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Chapter 4
Challenges in Crawling
the Deep Web
Yan Wang
Jianguo Lu
CONTENTS
4.1 Introduction ...................................................................... 98
4.2 Problem .......................................................................... 99
4.2.1 Deep web crawling ....................................................... 99
4.2.2 Performance measurement ................................................ 101
4.2.3 Models of textual deep web data sources .................................. 103
4.3 Crawling on Model M
0
and M
h
.................................................... 104
4.3.1 Hardness analysis ........................................................ ...