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The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.
CSS HTML Validator (previously named CSE HTML Validator) is an HTML editor and CSS editor for Microsoft Windows (and Linux and other Unix-like operating systems when used with Wine) that helps web developers create syntactically correct and accessible HTML/HTML5, XHTML, and CSS documents by locating errors, potential problems like browser compatibility issues, and common mistakes.
The engine was initially given the name jughead, but then later renamed. [2] Unlike later search engines, like Aliweb , which attempt to index the web by crawling over the accessible content of web sites, W3 Catalog exploited the fact that many high-quality, manually maintained lists of web resources were already available.
To get Wikipedia search results while on any web page, you can temporarily set your browser's (web-based) search box to interface the Wikipedia search engine and land on Wikipedia's search results page. This trick removes the need to first navigate to Wikipedia from a web page, and then do the search or navigation. It is a temporary change, and ...
W3Schools is a freemium educational website for learning coding online. [1] [2] Initially released in 1998, it derives its name from the World Wide Web but is not affiliated with the W3 Consortium. [3] [4] [unreliable source] W3Schools offers courses covering many aspects of web development. [5] W3Schools also publishes free HTML templates.
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Protocol and file format to list the URLs of a website For the graphical representation of the architecture of a web site, see site map. This article contains instructions, advice, or how-to content. Please help rewrite the content so that it is more encyclopedic or move it to ...
McAfee WebAdvisor, previously known as McAfee SiteAdvisor, is a service that reports on the safety of web sites by crawling the web and testing the sites it finds for malware and spam. A browser extension can show these ratings on hyperlinks such as on web search results. [1]
This explains why sometimes a search on a commercial search engine, such as Yahoo! or Google, will return results that are, in fact, dead links. Since the search results are based on the index, if the index has not been updated since a Web page became invalid the search engine treats the page as still an active link even though it no longer is.