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...

Look up validator in Wiktionary, the free dictionary. A validator is a computer program used to check the validity or syntactical correctness of a fragment...

syntax have been successfully validated using either the free W3C validator services (W3C HTML Validator and W3C CSS Validator) or some other trustworthy...

similar approaches of using RDFa and microformats. In 2013, because the W3C HTML Working Group failed to find someone to serve as an editor for the Microdata...

World Wide Web Consortium (W3C)'s explicit favoring of royalty-free licenses. Apple later disclosed the patents under the W3C's royalty-free patent licensing...

(W3C), which last developed a recommendation in 2004. WHATWG took over the development of the standard, publishing it as a living document. The W3C now...

HTML validator's data type library. On 28 May 2019, the W3C announced that WHATWG would be the sole publisher of the HTML and DOM standards. The W3C and...

final major HTML version that is now a retired World Wide Web Consortium (W3C) recommendation. The current specification is known as the HTML Living Standard...

Font family Web colors JavaScript WebCL HTMX Web3D WebGL WebGPU WebXR W3C Validator WHATWG Quirks mode Web storage Rendering engine Comparisons Document...

forecast. Use of meta refresh is discouraged by the World Wide Web Consortium (W3C), since unexpected refresh can disorient users. Meta refresh also impairs...

references Microdata (HTML) Microformat Polyglot markup Semantic HTML W3C (X)HTML Validator Web colors Even though HTML can be run in a browser, it is not viewed...

"Miscellaneous". W3C DOM Compatibility - HTML. QuirksMode. Retrieved 14 February 2009. Quirks Mode Living Standard The W3C Markup Validation Service Testing...

Unlike W3C XML Schema, RELAX NG was designed so that validation and augmentation (adding type information and default values) are separate. W3C XML Schema...

(the current WHATWG HTML Living Standard, as well as the formerly competing W3C HTML 5.0 and 5.1) specifies a list of encodings which browsers must support...

respectively. Web Storage is standardized by the World Wide Web Consortium (W3C) and WHATWG, and is supported by all major browsers. Web storage differs...

Mobile 5.0 and higher Opera Mobile 11.0 and higher "HTML5 article element - W3C". W3.org. Retrieved 2014-05-08. "The Article Contents element". MDN Web Docs...

Dynamic web page "Document Object Model FAQ". W3C. October 22, 2003. Retrieved 2022-02-16. "Web Style Sheets". W3C. 22 July 1999. Retrieved 7 April 2018. Pedamkar...

standards organization for the World Wide Web, the World Wide Web Consortium (W3C), recommends that every image displayed through HTML have an alt attribute...

HTML 4.01 that it became part of the HTML language, appearing in the HTML 4 W3C Working Draft in 1997. <span> was introduced to mark up any inline span of...

Vocabulary and Associated APIs for HTML and XHTML, W3C Working Draft". W3C. 5 April 2011.. HTML 4.01, W3C, retrieved 2012-03-26 Tittel, Ed; Burmeister, Mary...

defined as "a platform for innovation, consolidation and cost efficiencies" by W3C CEO Jeff Jaffe. Being built on The evergreen Web (where rapid, automatic...

types. Such a post-validation infoset can be useful in the development of XML document processing software. XML Schema, published as a W3C recommendation...

original W3C Recommendation (May 5, 1999), Web Content Accessibility Guidelines 1.0 – Guideline 7. W3.org, retrieved September 28, 2007 W3C Recommendation...

can be checked for validity with the W3C Markup Validation Service (for XHTML5, the Validator. nu Living Validator should be used instead). In practice...

XHTML+RDFa documents can be validated individually online at the W3C Markup Validation Service or together with CSS and RSS at W3C Unicorn. The validity of...

– libxml includes xmllint XML Validator Online Validate your XML data. XML Schema Validator Validate XML files against an XML Schema. "Well-Formed XML...

run-time, not letting the program override the memory. A project WebCL Validator, was initiated by the Khronos Group (developers) on handling this vulnerability...

Consortium (W3C). Internet media type (MIME type) text/css is registered for use with CSS by RFC 2318 (March 1998). The W3C operates a free CSS validation service...

on all modules. XHTML Basic 1.1 became a W3C Recommendation in July 2008, superseding XHTML-MP 1.2. To validate as XHTML-MP, a document must contain a proper...

At that time, Netscape proposed frames to the World Wide Web Consortium (W3C) for inclusion in the HTML 3.0 standard. Frames were used to display and...