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Web crawler: History & Applications

A web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web and that is typically operated by search engines for the purpose of Web indexing (web spidering).

Language: English [EN]
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Web crawler topic overview

The analysis highlights History and Applications as prominent areas in the source structure around Web crawler. 1 topic appears in more than one source area, which can help identify connections that are less obvious in a linear reading.

Related topics
136
Source areas
11
Connected nodes
148
Extracted relationships
143
Concept neighborhoods
42
Bridge connections
148

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 46 topics
Open-source crawlers · 26 topics
Crawling policy · 24 topics
In-house web crawlers · 10 topics
Crawling the deep web · 8 topics
Commercial web crawlers · 7 topics
Historical web crawlers · 6 topics
Security · 5 topics
Crawler identification · 3 topics
Architectures · 1 topics
Nomenclature · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Nomenclature

  • FOAF FOAF (software)

Crawling policy

Architectures

Security

Crawler identification

Crawling the deep web

Historical web crawlers

In-house web crawlers

Commercial web crawlers

Open-source crawlers

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Web crawler connects Entity context

The extracted context around Web crawler shows recurring relationship patterns in the source. For example, Web crawler → AGPL, Amazon CloudSearch, Apache Hadoop, Apache License, Apache Nutch, Apache Solr, Apache Storm, BSD, Dig, Elasticsearch, FTP, GNU Wget, GPL, Grub, Heritrix, HTTrack, Internet Archive's, It, Java, Microsoft Azure Cognitive Search Another extracted example is Web crawler → Apple's, Applebot, Baidu's, Baiduspider, Bingbot, DuckDuckBot, DuckDuckGo's, During, Googlebot, If, It, Mercator, Microsoft's Bing, Msnbot, Python, Siri, The, There, URL, URLs. Use these groups to spot repeated connection types before inspecting the individual relationships.

Web crawler

Top relations

related to Open-source crawlers · 29
Web crawler → AGPL, Amazon CloudSearch, Apache Hadoop, Apache License, Apache Nutch, Apache Solr, Apache Storm, BSD, Dig, Elasticsearch, FTP, GNU Wget, GPL, Grub, Heritrix, HTTrack, Internet Archive's, It, Java, Microsoft Azure Cognitive Search
related to In-house web crawlers · 25
Web crawler → Apple's, Applebot, Baidu's, Baiduspider, Bingbot, DuckDuckBot, DuckDuckGo's, During, Googlebot, If, It, Mercator, Microsoft's Bing, Msnbot, Python, Siri, The, There, URL, URLs
related to Further reading · 18
Web crawler → Archived, Cho, Current Challenges, Denis, History, ICWE'13, Intelligent Web Crawling, July, Junghoo, OWASP, Search Engines, Shestakov, UCLA Computer Science Department, Wayback Machine, Web Crawling, Web Crawling Project, WI-IAT'13, WileyWIVET
related to Historical web crawlers · 14
Web crawler → Bingbot, California, Civil Engineering, Davis, Mani Singh, Microsoft, Slurp, The, University, Unix, URLs, WolfBot, World Wide Web Worm, Yahoo
related to Crawler identification · 9
Web crawler → Examining Web, HTTP, Identification, In, Spambots, The, URL, User-agent, Web
related to Commercial web crawlers · 7
Web crawler → APISortSite, Diffbot, Mac OSSwiftbot, Search, Swiftype's, The, Windows
related to overview · 6
Web crawler → As, If, The, Those, URLs, Web
related to Politeness policy · 5
Web crawler → As, Crawlers, If, Koster, The
related to Re-visit policy · 5
Web crawler → By, From, The, The Web, Web
is a · 3
Web crawler → highly extensible Web Crawler written in Java and released under an Apache License, outcome of a combination of policies, server and the Web sites are the queues

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

web crawler pages crawlers crawling search url crawl also page engines urls may use server given engine resources used policy

Web crawler relationships Subject–Predicate–Object triples

TTTA extracted 143 structured relationships around Web crawler. Examples in this analysis include Web crawler → is a → outcome of a combination of policies and Web crawler → is a → server and the Web sites are the queues. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Web crawleris aoutcome of a combination of policies0.90text
Web crawleris aserver and the Web sites are the queues0.90text
Web crawleris ahighly extensible Web Crawler written in Java and released under an Apache License0.90text
.htmlinstance ofa crawler may examine the URL and only request a resource if the URL ends with certain characters0.80text
.htminstance ofa crawler may examine the URL and only request a resource if the URL ends with certain characters0.80text
.aspinstance ofa crawler may examine the URL and only request a resource if the URL ends with certain characters0.80text
.aspxinstance ofa crawler may examine the URL and only request a resource if the URL ends with certain characters0.80text
.phpinstance ofa crawler may examine the URL and only request a resource if the URL ends with certain characters0.80text
.jspinstance ofa crawler may examine the URL and only request a resource if the URL ends with certain characters0.80text
.jspx or a slashinstance ofa crawler may examine the URL and only request a resource if the URL ends with certain characters0.80text
Apache Solrinstance ofIt can be used with many repositories0.80text
Elasticsearchinstance ofIt can be used with many repositories0.80text

Related concept clusters Concept neighborhoods

The concept neighborhoods around Web crawler bring nearby vocabulary together. In this analysis, examples include Web, Pages and Crawlers. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Web crawler
    • Web
    • Pages
    • Crawlers
    • Crawling
    • Search
    • Download
    • Given
    • May
    • Also
    • Focused
    • Time
    • Crawl
  • web crawler
    • Web
    • Pages
    • Crawlers
    • Crawling
    • Search
    • Written
    • Download
    • Given
    • May
    • Also
    • Focused
    • Time
  • search engines
    • Engines
    • Search
    • Engine
    • Web
    • Software
    • Index
    • Pages
    • Content
    • Crawling
    • Crawlers
    • Use
    • Also
  • crawl frontier
    • Breadth-first
    • Pages
    • Given
    • Pagerank
    • Data
    • Using
    • Web
    • Freshness
    • Crawling
    • Crawler
    • Time
    • Al
  • focused crawlers
    • Web
    • Given
    • Focused
    • Download
    • Resources
    • Links
    • Server
    • Pages
    • Site
    • May
    • Also
    • Avoid
  • microsoft academic search
    • Engines
    • Engine
    • Web
    • Software
    • Pages
    • Index
    • Crawling
    • Crawlers
    • Use
    • Also
    • Focused
    • Links
  • search engine indexed
    • Engines
    • Engine
    • Search
    • Web
    • Software
    • Also
    • Focused
    • Pages
    • Written
    • Index
    • Crawling
    • Crawlers
  • web pages
    • Web
    • Download
    • Crawl
    • Given
    • Page
    • Freshness
    • Time
    • Al
    • Et
    • Policy
    • Search
    • Breadth-first

Connections between topic areas Semantic bridges

For Web crawler, one of the stronger structural bridges in this analysis connects Web crawler with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Web crawlerOverview · splits 102 ⟂ 47
Web crawlerOpen-source crawlers · splits 122 ⟂ 27
Web crawlerCrawling policy · splits 124 ⟂ 25
Web crawlerIn-house web crawlers · splits 138 ⟂ 11
Web crawlerCrawling the deep web · splits 140 ⟂ 9
Web crawlerCommercial web crawlers · splits 141 ⟂ 8
Web crawlerHistorical web crawlers · splits 142 ⟂ 7
Web crawlerSecurity · splits 143 ⟂ 6
Web crawlerCrawler identification · splits 145 ⟂ 4

Map overview Semantic statistics

Web crawler

Nodes149
Edges148
Triples143
Avg. degree1.99
Density0.013423
Components1

Source & methodology

TTTA analyzes the structure around Web crawler to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History & Applications, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Web crawler · EN edition · Analysis: TopicsToTalkAbout

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