HyperText Markup Language
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| HyperText Markup Language | |
|---|---|
| Name | HyperText Markup Language |
| Paradigm | Declarative markup |
| Designer | Tim Berners-Lee |
| Developer | World Wide Web Consortium |
| First appeared | 1991 |
| Stable release | HTML5 (2014) |
| Influenced by | SGML, GML |
| Influenced | XHTML, XML, Markdown |
HyperText Markup Language HyperText Markup Language is the core markup language for creating documents on the World Wide Web, originating in the early 1990s and standardized primarily by the World Wide Web Consortium and other standards bodies. It is implemented across browsers such as Mosaic, Netscape Navigator, Internet Explorer, Mozilla Firefox, Google Chrome, and Safari, and it underpins web platforms used by institutions like Google, Microsoft, Facebook, Amazon (company), and Wikipedia. Its role is central to web stacks employed by projects like LAMP (software bundle), MEAN stack, Ruby on Rails, and organizations such as W3C and WHATWG.
History
The language was invented by Tim Berners-Lee while at CERN and rapidly adopted by early web communities connected to World Wide Web Consortium initiatives, influencing projects at MIT, DARPA, and NSF. Early implementations in servers like CERN httpd and clients including Mosaic and Netscape Navigator spread usage among researchers at SLAC National Accelerator Laboratory and institutions like Harvard University and Stanford University. Standardization milestones involved organizations such as IETF, W3C, and later WHATWG; major events like the publication of HTML 2.0, HTML 4.01, and the push toward HTML5 were shaped by contributors from Apple Inc., Mozilla Foundation, Opera Software, and browser vendors participating in interoperability workshops such as those at TPAC. Legal and policy intersections appeared in contexts involving European Commission consultations and accessibility directives influenced by United States Department of Justice actions.
Versions and Standards
Standards work progressed through drafts, recommendations, and living specifications managed by W3C and WHATWG, with normative snapshots recognized by stakeholders like ICANN and IETF. Notable versions include HTML 2.0 (RFC by IETF), HTML 3.2 and 4.01 overseen by W3C, and HTML5 championed by groups including WHATWG contributors from Apple Inc., Google, Microsoft, and Mozilla Foundation. Related specifications and standards intersect with ECMAScript (managed by Ecma International), CSS (by W3C), SVG (by W3C), and MathML; compliance and testing are performed via suites from organizations like W3C and tools produced by projects such as Web Platform Tests. Governance disputes between W3C and WHATWG influenced the creation of a living standard model embraced by many vendors.
Syntax and Document Structure
Documents begin with a doctype declaration and a nested tree of nodes processed by browser engines such as Blink, Gecko, WebKit, and Trident. The parsing algorithm and error handling were refined through collaboration among implementers at Google, Mozilla Foundation, Apple Inc., and Microsoft. Document structure normally uses head and body sections, metadata handled via elements aligned with Dublin Core practices in institutional repositories like Internet Archive and European Library. Serialization and MIME type handling reference standards developed by IANA and coordinated with protocols like HTTP/1.1 and HTTP/2 stewarded by IETF working groups.
Elements and Attributes
The language defines semantic elements such as headings, paragraphs, lists, tables, forms, and embedded content; implementations add attributes and global properties informed by input from browser vendors including Google, Microsoft, and Mozilla Foundation. Form controls interact with specifications from WHATWG and accessibility APIs used by platforms like Microsoft Windows, macOS, and GNOME; multimedia elements integrate with codecs and container formats tied to stakeholders like MPEG, ISO, and companies such as Apple Inc. and Netflix. Document models interoperate with DOM standards maintained by W3C and implemented in libraries like jQuery, server frameworks such as Django and ASP.NET, and content management systems including WordPress and Drupal.
APIs and Integration with CSS/JavaScript
APIs defined alongside the language enable scripting and dynamic behavior via ECMAScript engines such as V8, SpiderMonkey, and JavaScriptCore developed by Google, Mozilla Foundation, and Apple Inc. respectively. Styling integration uses Cascading Style Sheets specifications produced by W3C and preprocessing tools maintained by communities around Sass, Less, and build systems like Webpack and Gulp (tool). Interactive APIs—such as the DOM, Fetch, WebSockets, WebRTC, Canvas, and WebGL—are specified by consortia and implemented by vendors including Google, Mozilla Foundation, Apple Inc., and Microsoft; tooling ecosystems include projects like Node.js, Electron, and NW.js.
Accessibility and Internationalization
Accessibility practices for content authored in the language refer to guidelines from W3C's Web Content Accessibility Guidelines and laws and standards enforced by entities like the United States Department of Justice, European Accessibility Act, and national bodies such as Ofcom and ACMA. Internationalization and localization rely on standards from Unicode Consortium, language tags from IETF BCP 47, and work by organizations like W3C's Internationalization Working Group; major deployments address bidirectional text and scripts used by communities associated with United Nations initiatives and institutions like UNESCO.
Usage and Implementation Practices
Practices include authoring workflows in editors like Visual Studio Code, Sublime Text, Atom (text editor), and IDEs from JetBrains and Microsoft. Deployment and hosting engage providers such as Amazon Web Services, Google Cloud Platform, Microsoft Azure, and CDNs like Akamai Technologies; continuous integration and testing are performed with tools from GitHub, GitLab, Travis CI, and Jenkins. Security and content policies reference standards and advisories from OWASP, CERT, and incident response coordination with organizations like FIRST; performance tuning engages metrics and tooling from PageSpeed initiatives and projects led by Google and W3C.