Purpose This paper aims to identify, evaluate and integrate the findings of all relevant and
high-quality individual studies addressing one or more research questions about …

This is a survey of the science and practice of web crawling. While at first glance web
crawling may appear to be merely an application of breadth-first-search, the truth is that …

The Deep Web, ie, content hidden behind HTML forms, has long been acknowledged as a
significant gap in search engine coverage. Since it represents a large portion of the …

An ever-increasing amount of information on the Web today is available only through search
interfaces: the users have to type in a set of keywords in a search form in order to access the …

In this paper we describe new adaptive crawling strategies to efficiently locate the entry
points to hidden-Web sources. The fact that hidden-Web sources are very sparsely …

The unprecedented growth of the Internet has given rise to the Dark Web, the problematic
facet of the Web associated with cybercrime, hate, and extremism. Despite the need for tools …

Recently, there has been increased interest in the retrieval and integration of hidden-Web
data with a view to leverage high-quality information available in online databases. Although …

The high quality, structured data from Web structured sources is invaluable for many
applications. Hidden Web databases are not directly crawlable by Web search engines and …

Structured data on the web Page 1 72 communicAtions of tHe Acm | FeBrUAry 2011 | voL. 54 |
No. 2 contributed articles ThoUgh The WeB is best known as a vast repository of shared …

Deep-web crawl is concerned with the problem of surfacing hidden content behind search
interfaces on the Web. While many deep-web sites maintain document-oriented textual …