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{{#invoke:Infobox|infobox}} {{#invoke:Sidebar|sidebar | titleclass = navbox-title | title = HTML | headingclass = navbox-abovebelow | contentclass = plainlist | contentstyle = padding-top:0.2em;padding-bottom:0.8em;

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Extensible Hypertext Markup Language (XHTML) is part of the family of XML markup languages. It mirrors or extends versions of the widely used Hypertext Markup Language (HTML), the language in which Web pages are formulated.

While HTML, prior to HTML5, was defined as an application of Standard Generalized Markup Language (SGML), a flexible markup language framework, XHTML is an application of XML, a more restrictive subset of SGML. XHTML documents are well-formed and may therefore be parsed using standard XML parsers, unlike HTML, which requires a lenient HTML-specific parser.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

XHTML 1.0 became a World Wide Web Consortium (W3C) Recommendation on January 26, 2000. XHTML 1.1 became a W3C Recommendation on May 31, 2001. The standard known as XHTML5 is being developed as an XML adaptation of the HTML5 specification.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>


XHTML sections
Intro   Overview    Versions of XHTML    Semantic content in XHTML    Valid XHTML documents    Backward compatibility   Cross-compatibility of XHTML and HTML   See also    References    External links   

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{{#invoke:Infobox|infobox}} {{#invoke:Sidebar|sidebar | titleclass = navbox-title | title = HTML | headingclass = navbox-abovebelow | contentclass = plainlist | contentstyle = padding-top:0.2em;padding-bottom:0.8em;

| content1 =

| heading2 = Comparisons | content2 =

 {{#invoke:Sidebar|sidebar}}

| navbarstyle = border-top:1px solid #aaa;

}}

Extensible Hypertext Markup Language (XHTML) is part of the family of XML markup languages. It mirrors or extends versions of the widely used Hypertext Markup Language (HTML), the language in which Web pages are formulated.

While HTML, prior to HTML5, was defined as an application of Standard Generalized Markup Language (SGML), a flexible markup language framework, XHTML is an application of XML, a more restrictive subset of SGML. XHTML documents are well-formed and may therefore be parsed using standard XML parsers, unlike HTML, which requires a lenient HTML-specific parser.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

XHTML 1.0 became a World Wide Web Consortium (W3C) Recommendation on January 26, 2000. XHTML 1.1 became a W3C Recommendation on May 31, 2001. The standard known as XHTML5 is being developed as an XML adaptation of the HTML5 specification.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>


XHTML sections
Intro   Overview    Versions of XHTML    Semantic content in XHTML    Valid XHTML documents    Backward compatibility   Cross-compatibility of XHTML and HTML   See also    References    External links   

PREVIOUS: IntroNEXT: Overview
<<>>