Web corpus construction

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The World Wide Web constitutes the largest existing source of texts written in a great variety of languages. A feasible and sound way of exploiting this data for linguistic research is to compile a static corpus for a given language. There are several advantages of this approach: (i) Working with su...

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Bibliographic Details
Main Author: Sch�afer, Roland
Other Authors: Bildhauer, Felix
Format: eBook
Language:English
Published: San Rafael, Calif. (1537 Fourth Street, San Rafael, CA 94901 USA) : Morgan & Claypool, c2013.
Series:Synthesis digital library of engineering and computer science.
Synthesis lectures on human language technologies ; # 22.
Subjects:
Computational linguistics.
Corpora (Linguistics) > Data processing.
Web search engines.
boilerplate removal
corpus comparison
corpus creation
corpus evaluation
duplicate detection
keyword extraction
language identification
near-duplicate detection
noisy data
POS tagging
tokenization
web characterization
web corpora
web crawling
Online Access:Abstract with links to full text
Description
Summary:The World Wide Web constitutes the largest existing source of texts written in a great variety of languages. A feasible and sound way of exploiting this data for linguistic research is to compile a static corpus for a given language. There are several advantages of this approach: (i) Working with such corpora obviates the problems encountered when using Internet search engines in quantitative linguistic research (such as non-transparent ranking algorithms). (ii) Creating a corpus from web data is virtually free. (iii) The size of corpora compiled from the WWW may exceed by several orders of magnitudes the size of language resources offered elsewhere. (iv) The data is locally available to the user, and it can be linguistically post-processed and queried with the tools preferred by her/him. This book addresses the main practical tasks in the creation of web corpora up to giga-token size. Among these tasks are the sampling process (i. e., web crawling) and the usual cleanups including boilerplate removal and removal of duplicated content. Linguistic processing and problems with linguistic processing coming from the different kinds of noise in web corpora are also covered. Finally, the authors show how web corpora can be evaluated and compared to other corpora (such as traditionally compiled corpora).
Item Description:Part of: Synthesis digital library of engineering and computer science.
Series from website.
Physical Description:1 electronic text (xv, 129 p.) : ill., digital file.
Also available in print.
Format:Mode of access: World Wide Web.
System requirements: Adobe Acrobat Reader.
Bibliography:Includes bibliographical references (p. 111-128).
ISBN:9781608459841 (electronic bk.)
ISSN:1947-4059 ;
Access:Abstract freely available; full-text restricted to subscribers or individual document purchasers.

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