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and Systems (NGITS), volume 2382 of Lecture Notes in Computer Science, pages 58–74, Caesarea, Israel. Springer.
[ 41 ]Cho, Junghoo; Hector Garcia-Molina (2002). "Parallel crawlers" (http:/ / portal. acm. org/ citation. cfm?id=511464). Proceedings of the 11th
international conference on World Wide Web. Honolulu, Hawaii, USA: ACM. pp. 124–135. doi:10.1145/511446.511464.
ISBN 1-58113-449-5.. Retrieved 2009-03-23.
[ 42 ]Chakrabarti, S. (2003). Mining the Web (http:/ / http://www. cs. berkeley. edu/ ~soumen/ mining-the-web/ ). Morgan Kaufmann Publishers. ISBN
1-55860-754-4
[ 43 ]Shestakov, Denis (2008). Search Interfaces on the Web: Querying and Characterizing (https:/ / oa. doria. fi/ handle/ 10024/ 38506). TUCS
Doctoral Dissertations 104, University of Turku
[ 44 ]Nelson, Michael L; Herbert Van de Sompel, Xiaoming Liu, Terry L Harrison, Nathan McFarland (2005-03-24). "mod_oai: An Apache
Module for Metadata Harvesting". Eprint arXiv:cs/0503069: 3069. arXiv:cs/0503069. Bibcode 2005cs........3069N.
[ 45 ]http:/ / http://www. infosecwriters. com/ text_resources/ pdf/ Crawling_AJAX_SShah. pdf
[ 46 ]http:/ / http://www. dbis. ethz. ch/ research/ publications/ AjaxSearchVLDB08. pdf
[ 47 ]http:/ / code. google. com/ web/ ajaxcrawling/ index. html
[ 48 ]Making AJAX Applications Crawlable: Full Specification (http:/ / code. google. com/ web/ ajaxcrawling/ docs/ specification. html)Further reading
- Cho, Junghoo, "Web Crawling Project" (http:/ / oak. cs. ucla. edu/ ~cho/ research/ crawl. html), UCLA Computer
Science Department.
Backlinks
Backlinks, also known as incoming links, inbound links, inlinks, and inward links, are incoming links to a
website or web page. In basic link terminology, a backlink is any link received by a web node (web page, directory,
website, or top level domain) from another web node.[1]
Inbound links were originally important (prior to the emergence of search engines) as a primary means of web
navigation; today, their significance lies in search engine optimization (SEO). The number of backlinks is one
indication of the popularity or importance of that website or page (for example, this is used by Google to determine
the PageRank of a webpage). Outside of SEO, the backlinks of a webpage may be of significant personal, cultural or
semantic interest: they indicate who is paying attention to that page.Search engine rankings
Search engines often use the number of backlinks that a website has as one of the most important factors for
determining that website's search engine ranking, popularity and importance. Google's description of their PageRank
system, for instance, notes that Google interprets a link from page A to page B as a vote, by page A, for page B.[2]
Knowledge of this form of search engine rankings has fueled a portion of the SEO industry commonly termed
linkspam, where a company attempts to place as many inbound links as possible to their site regardless of the context
of the originating site.
Websites often employ various search engine optimization techniques to increase the number of backlinks pointing
to their website. Some methods are free for use by everyone whereas some methods like linkbaiting requires quite a
bit of planning and marketing to work. Some websites stumble upon "linkbaiting" naturally; the sites that are the first
with a tidbit of 'breaking news' about a celebrity are good examples of that. When "linkbait" happens, many websites
will link to the 'baiting' website because there is information there that is of extreme interest to a large number of
people.
There are several factors that determine the value of a backlink. Backlinks from authoritative sites on a given topic
are highly valuable.[3] If both sites have content geared toward the keyword topic, the backlink is considered relevant
and believed to have strong influence on the search engine rankings of the webpage granted the backlink. A backlink
represents a favorable 'editorial vote' for the receiving webpage from another granting webpage. Another important