XHTML - Wikipedia, the free encyclopedia

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29 Apr 14

klenkovic
Općenito o XHTML-u, vezi sa XML-om i HTML-om, njegovoj sintaksi i verzijama.

WWW MMS_2014 Wikipedia XML XHTML HTML
- XHTML (Extensible HyperText Markup Language) is a family of XML markup languages that mirror or extend versions of the widely used Hypertext Markup Language (HTML), the language in which Web pages are written.
 
 While HTML (prior to HTML5) was defined as an application of Standard Generalized Markup Language (SGML), a very flexible markup language framework, XHTML is an application of XML, a more restrictive subset of SGML. Because XHTML documents need to be well-formed, they can be parsed using standard XML parsers, unlike HTML, which requires a lenient HTML-specific parser.
 
 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.
- XHTML 1.0 is "a reformulation of the three HTML 4 document types as applications of XML 1.0".^[3] The World Wide Web Consortium (W3C) also continues to maintain the HTML 4.01 Recommendation, and the specifications for HTML5 and XHTML5 are being actively developed. In the current XHTML 1.0 Recommendation document, as published and revised to August 2002, the W3C commented that, "The XHTML family is the next step in the evolution of the Internet. By migrating to XHTML today, content developers can enter the XML world with all of its attendant benefits, while still remaining confident in their content's backward and future compatibility.
- There are various differences between XHTML and HTML. The Document Object Model is a tree structure that represents the page internally in applications, and XHTML and HTML are two different ways of representing that in markup (serializations). Both are less expressive than the DOM (for example, "--" may be placed in comments in the DOM, but cannot be represented in a comment in either XHTML or HTML), and generally XHTML's XML syntax is a little more expressive than HTML (for example, arbitrary namespaces are not allowed in HTML). First off, one source of differences is immediate: XHTML uses an XML syntax, while HTML uses a pseudo-SGML syntax (officially SGML for HTML 4 and under, but never in practice, and standardised away from SGML in HTML5). Secondly however, because the expressible contents of the DOM in syntax are slightly different, there are some changes in actual behavior between the two models
- In the early 2000s, some Web developers began to question why Web authors ever made the leap into authoring in XHTML.^[26]^[27]^[28] Others countered that the problems ascribed to the use of XHTML could mostly be attributed to two main sources: the production of invalid XHTML documents by some Web authors and the lack of support for XHTML built into Internet Explorer 6.^[29]^[30] They went on to describe the benefits of XML-based Web documents (i.e. XHTML) regarding searching, indexing and parsing as well as future-proofing the Web itself.
- The root element of an XHTML document must be html, and must contain an xmlns attribute to associate it with the XHTML namespace. The namespace URI for XHTML is http://www.w3.org/1999/xhtml. The example tag below additionally features an xml:lang attribute to identify the document with a natural language:
 
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
- DOCTYPEs[edit]
 
 Main article: DOCTYPE
 
 In order to validate an XHTML document, a Document Type Declaration, or DOCTYPE, may be used. A DOCTYPE declares to the browser the Document Type Definition (DTD) to which the document conforms. A Document Type Declaration should be placed before the root element.
 
 The system identifier part of the DOCTYPE, which in these examples is the URL that begins with http://, need only point to a copy of the DTD to use, if the validator cannot locate one based on the public identifier (the other quoted string). It does not need to be the specific URL that is in these examples; in fact, authors are encouraged to use local copies of the DTD files when possible. The public identifier, however, must be character-for-character the same as in the examples.
- A character encoding may be specified at the beginning of an XHTML document in the XML declaration when the document is served using the application/xhtml+xml MIME type. (If an XML document lacks encoding specification, an XML parser assumes that the encoding is UTF-8 or UTF-16, unless the encoding has already been determined by a higher protocol.)
 
 For example:
 
 <?xml version="1.0" encoding="UTF-8" ?>
 
 The declaration may be optionally omitted because it declares as its encoding the default encoding. However, if the document instead makes use of XML 1.1 or another character encoding, a declaration is necessary. Internet Explorer prior to version 7 enters quirks mode, if it encounters an XML declaration in a document served as text/html.
5 more annotations...
07 Jun 13

Gary Edwards
- Most prominently, behavior on parse errors differ. A fatal parse error in XML (such as an incorrect tag structure) causes document processing to be aborted.
 
 Most content requiring namespaces will not work in HTML, except the built-in support for SVG and MathML in the HTML5 parser along with certain magic prefixes such as xlink.
 
 JavaScript processing is a little different in XHTML, with minor changes in case sensitivity to some functions, and further precautions to restrict processing to well-formed content. Scripts must not use the document.write() method; it is not available for XHTML. The innerHTML property is available, but will not insert non-well-formed content. On the other hand, it can be used to insert well-formed namespaced content into XHTML.
 
 CSS is also applied slightly differently. Due to XHTML's case-sensitivity, all CSS selectors become case sensitive for XHTML documents.^[14] Some CSS properties, such as backgrounds, set on the <body> element in HTML are 'inherited upwards' into the <html> element; this appears not to be the case for XHTML.^[15]
- As long as support is not widespread, most web developers avoid using XHTML that is not HTML-compatible,^[23] so advantages of XML such as namespaces, faster parsing and smaller-footprint browsers do not benefit the user.
- In October 2006, HTML inventor and W3C chair Tim Berners-Lee, introducing a major W3C effort to develop a new HTML specification, posted in his blog that, "The attempt to get the world to switch to XML … all at once didn't work. The large HTML-generating public did not move … Some large communities did shift and are enjoying the fruits of well-formed systems … The plan is to charter a completely new HTML group."^[29]
- The current HTML5 working draft says "special attention has been given to defining clear conformance criteria for user agents in an effort to improve interoperability
- the W3C announced that it does not intend to recharter the XHTML2 WG,^[49] and closed the WG in December 2010,
- XHTML5
- WHATWG, or Web Hypertext Application Technology Working Group
- The key motive of the group was to create a platform for dynamic web applications;
- they considered XHTML 2.0 to be too document-centric, and not suitable for the creation of internet forum sites or online shops.^[54]
- HTML5 has both a regular text/html serialization and an XML serialization, which is known as XHTML5. In addition to the markup language, the specification includes a number of application programming interfaces.
- The Document Object Model is extended with APIs for editing, drag-and-drop, data storage and network communication.
9 more annotations...
10 Nov 12

gopala krishnan
computerr
- <h1 id="firstHeading" class="firstHeading">XHTML</h1>   <div id="bodyContent">  <div id="siteSub">From Wikipedia, the free encyclopedia</div>   <div id="contentSub"></div>   <div id="jump-to-nav" class="mw-jump"> Jump to: <a rel="nofollow" href="#mw-head">navigation</a>, <a rel="nofollow" href="#p-search">search</a> </div>   <div lang="en" id="mw-content-text" class="mw-content-ltr" dir="ltr"><table style="border-spacing: 3px; width:22em;" class="infobox" cellspacing="3"> <caption style="" class="">XHTML</caption> <tbody><tr class=""> <td style="text-align:center;" class="" colspan="2"><a rel="nofollow" href="/wiki/File:XHTML.svg" class="image"><img width="200" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/00/XHTML.svg/300px-XHTML.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/00/XHTML.svg/400px-XHTML.svg.png 2x" height="228" alt="XHTML.svg" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/00/XHTML.svg/200px-XHTML.svg.png"></a></td> </tr> <tr class=""> <th style="text-align:left;" scope="row"><a rel="nofollow" href="/wiki/Filename_extension" title="Filename extension">Filename extension</a></th> <td style="" class=""><code>.xhtml, .xht, .xml, .html, .htm</code></td> </tr> <tr class=""> <th style="text-align:left;" scope="row"><a rel="nofollow" href="/wiki/Internet_media_type" title="Internet media type">Internet media type</a></th> <td style="" class=""><code>application/xhtml+xml</code></td> </tr> <tr class=""> <th style="text-align:left;" scope="row">Developed by</th> <td style="" class=""><a rel="nofollow" href="/wiki/World_Wide_Web_Consortium" title="World Wide Web Consortium">World Wide Web Consortium</a></td> </tr> <tr class=""> <th style="text-align:left;" scope="row">Initial release</th> <td style="" class="">26 January 2000 (2000-01-26)</td> </tr> <tr class=""> <th style="text-align:left;" scope="row"><a rel="nofollow" href="/wiki/Software_release_life_cycle" title="Software release life cycle">Latest release</a></th> <td style="" class="">1.1 (Second Edition) / 23 November 2010; 23 months ago (2010-11-23)</td> </tr> <tr class=""> <th style="text-align:left;" scope="row">Type of format</th> <td style="" class=""><a rel="nofollow" href="/wiki/Markup_language" title="Markup language">Markup language</a></td> </tr> <tr class=""> <th style="text-align:left;" scope="row">Extended from</th> <td style="" class=""><a rel="nofollow" href="/wiki/XML" title="XML">XML</a>, <a rel="nofollow" href="/wiki/HTML" title="HTML">HTML</a></td> </tr> <tr class=""> <th style="text-align:left;" scope="row"><a rel="nofollow" href="/wiki/International_standard" title="International standard">Standard(s)</a></th> <td style="" class=""> <a rel="nofollow" href="http://www.w3.org/TR/2000/REC-xhtml1-20000126/" class="external text" rel="nofollow">1.0 (Recommendation)</a>, <a rel="nofollow" href="http://www.w3.org/TR/2002/REC-xhtml1-20020801/" class="external text" rel="nofollow">1.0 SE (Recommendation)</a>, <a rel="nofollow" href="http://www.w3.org/TR/2001/REC-xhtml11-20010531/" class="external text" rel="nofollow">1.1 (Recommendation)</a>, <a rel="nofollow" href="http://www.w3.org/TR/2010/REC-xhtml11-20101123/" class="external text" rel="nofollow">1.1 SE (Recommendation)</a>, <a rel="nofollow" href="http://www.w3.org/TR/html5/" class="external text" rel="nofollow">5 (Working Draft)</a></td> </tr> </tbody></table> <table style="float: right; clear: right; background-color: #f9f9f9; border: 1px solid #aaa; width:22em; margin: 0 0 1em 1em; padding: 0.2em; border-spacing: 0.4em 0; text-align: center; line-height: 1.4em; font-size: 88%;" class="vertical-navbox nowraplinks" cellspacing="5" cellpadding="0"> <tbody><tr> <th style="padding: 0.2em 0.4em 0.2em; font-size: 145%; line-height: 1.2em;" class=""><a rel="nofollow" href="/wiki/HTML" title="HTML">HTML</a></th> </tr> <tr> <td style="padding-top: 0.2em; padding-bottom: 0.2em; text-align: left;" class=""> <ul> <li><a rel="nofollow" href="/wiki/HTML" title="HTML">HTML</a> and <a rel="nofollow" href="/wiki/HTML5" title="HTML5">HTML5</a>;  <a rel="nofollow" href="/wiki/HTML_editor" title="HTML editor">HTML editor</a></li> <li><a rel="nofollow" href="/wiki/Dynamic_HTML" title="Dynamic HTML">Dynamic HTML</a></li> <li>XHTML <ul> <li><a rel="nofollow" href="/wiki/XHTML_Basic" title="XHTML Basic">XHTML Basic (Mobile)</a></li> <li><a rel="nofollow" href="/wiki/XHTML_Mobile_Profile" title="XHTML Mobile Profile">XHTML Mobile Profile</a> and <a rel="nofollow" href="/wiki/C-HTML" title="C-HTML">C-HTML</a></li> </ul> </li> <li><a rel="nofollow" href="/wiki/HTML_element" title="HTML element">HTML element</a></li> <li><a rel="nofollow" href="/wiki/Character_encodings_in_HTML" title="Character encodings in HTML">Character encodings</a>; <a rel="nofollow" href="/wiki/Unicode_and_HTML" title="Unicode and HTML">Unicode</a></li> <li><a rel="nofollow" href="/wiki/Language_code" title="Language code">Language code</a></li> <li><a rel="nofollow" href="/wiki/Document_Object_Model" title="Document Object Model">Document Object Model</a></li> <li><a rel="nofollow" href="/wiki/Browser_Object_Model" title="Browser Object Model">Browser Object Model</a></li> <li><a rel="nofollow" href="/wiki/Style_sheet_(web_development)" title="Style sheet (web development)">Style sheets</a> and <a rel="nofollow" href="/wiki/Cascading_Style_Sheets" title="Cascading Style Sheets">CSS</a></li> <li><a rel="nofollow" href="/wiki/Font_family_(HTML)" title="Font family (HTML)">Font family</a> and <a rel="nofollow" href="/wiki/Web_colors" title="Web colors">Web colors</a></li> <li><a rel="nofollow" href="/wiki/HTML_scripting" title="HTML scripting">HTML scripting</a> and <a rel="nofollow" href="/wiki/JavaScript" title="JavaScript">JavaScript</a></li> <li><a rel="nofollow" href="/wiki/World_Wide_Web_Consortium" title="World Wide Web Consortium">W3C</a>, <a rel="nofollow" href="/wiki/WHATWG" title="WHATWG">WHATWG</a>, and <a rel="nofollow" href="/wiki/W3C_Markup_Validation_Service" title="W3C Markup Validation Service">validator</a></li> <li><a rel="nofollow" href="/wiki/Quirks_mode" title="Quirks mode">Quirks mode</a></li> <li><a rel="nofollow" href="/wiki/Framing_(World_Wide_Web)" title="Framing (World Wide Web)">HTML Frames</a></li> <li><a rel="nofollow" href="/wiki/Canvas_element" title="Canvas element">HTML5 Canvas</a>, <a rel="nofollow" href="/wiki/WebGL" title="WebGL">WebGL</a>, and <a rel="nofollow" href="/wiki/WebCL" title="WebCL">WebCL</a></li> <li><a rel="nofollow" href="/wiki/HTML5_Audio" title="HTML5 Audio">HTML5 Audio</a> and <a rel="nofollow" href="/wiki/HTML5_video" title="HTML5 video">HTML5 video</a></li> <li><a rel="nofollow" href="/wiki/Web_storage" title="Web storage">Web storage</a></li> <li><a rel="nofollow" href="/wiki/Web_browser_engine" title="Web browser engine">Web browser (layout) engine</a></li> <li>Comparison of <ul> <li><a rel="nofollow" href="/wiki/Comparison_of_document_markup_languages" title="Comparison of document markup languages">document markup languages</a></li> <li><a rel="nofollow" href="/wiki/Comparison_of_web_browsers" title="Comparison of web browsers">web browsers</a></li> <li><a rel="nofollow" href="/wiki/Comparison_of_web_browser_engines" title="Comparison of web browser engines">layout engine support</a> for <ul> <li><a rel="nofollow" href="/wiki/Comparison_of_layout_engines_(HTML)" title="Comparison of layout engines (HTML)">HTML</a>;　<a rel="nofollow" href="/wiki/Comparison_of_layout_engines_(non-standard_HTML)" title="Comparison of layout engines (non-standard HTML)">Non-standard HTML</a></li> <li><a rel="nofollow" href="/wiki/Comparison_of_layout_engines_(XHTML)" title="Comparison of layout engines (XHTML)">XHTML</a> (<a rel="nofollow" href="/wiki/Comparison_of_layout_engines_(XHTML_1.1)" title="Comparison of layout engines (XHTML 1.1)">1.1</a>)</li> <li><a rel="nofollow" href="/wiki/Comparison_of_layout_engines_(HTML5)" title="Comparison of layout engines (HTML5)">HTML5</a>;  <a rel="nofollow" href="/wiki/Comparison_of_layout_engines_(HTML5_canvas)" title="Comparison of layout engines (HTML5 canvas)">HTML5 canvas</a>, <ul> <li><a rel="nofollow" href="/wiki/Comparison_of_layout_engines_(HTML5_media)" title="Comparison of layout engines (HTML5 media)">HTML5 media　(Audio, Video)</a></li> </ul> </li> </ul> </li> </ul> </li> </ul> </td> </tr> <tr> <td style="text-align: right; font-size: 115%;"> <div style="" class="noprint plainlinks hlist navbar mini"> <ul> <li class="nv-view"><a rel="nofollow" href="/wiki/Template:HTML" title="Template:HTML">v</a></li> <li class="nv-talk"><a rel="nofollow" href="/wiki/Template_talk:HTML" title="Template talk:HTML">t</a></li> <li class="nv-edit"><a rel="nofollow" href="//en.wikipedia.org/w/index.php?title=Template:HTML&action=edit" class="external text">e</a></li> </ul> </div> </td> </tr> </tbody></table> XHTML (Extensible HyperText Markup Language) is a family of <a rel="nofollow" href="/wiki/XML" title="XML">XML</a> <a rel="nofollow" href="/wiki/Markup_language" title="Markup language">markup languages</a> that mirror or extend versions of the widely used <a rel="nofollow" href="/wiki/Hypertext_Markup_Language" class="mw-redirect" title="Hypertext Markup Language">Hypertext Markup Language</a> (HTML), the language in which <a rel="nofollow" href="/wiki/Web_page" title="Web page">web pages</a> are written. While HTML (prior to <a rel="nofollow" href="/wiki/HTML5" title="HTML5">HTML5</a>) was defined as an application of <a rel="nofollow" href="/wiki/Standard_Generalized_Markup_Language" title="Standard Generalized Markup Language">Standard Generalized Markup Language</a> (SGML), a very flexible markup lang</div></div>
- age framework, XHTML is an application of XML, a more restrictive subset of SGML. Because XHTML documents need to be well-formed, they can be parsed using standard XML parsers—unlike HTML, which requires a lenient HTML-specific parser.
 
 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. XHTML5 is undergoing development as of September 2009, as part of the HTML5 specification.
- Relationship to HTML
 
 There are various differences between XHTML and HTML. The Document Object Model is a tree structure that represents the page internally in applications, and XHTML and HTML are two different ways of representing that in markup (serializations). Both are less expressive than the DOM (for example, "--" may be placed in comments in the DOM, but cannot be represented in a comment in either XHTML or HTML), and generally XHTML's XML syntax is a little more expressive than HTML (for example, arbitrary namespaces are not allowed in HTML). So, firstly one source of differences is immediate: XHTML uses an XML syntax, while HTML uses a pseudo-SGML syntax (officially SGML for HTML 4 and under, but never in practice, and standardised away from SGML in HTML5). Secondly however, because the expressible contents of the DOM in syntax are slightly different, there are some changes in actual behavior between the two models.
 
 First, there are some differences in syntax:^[12]
 
 Broadly, the XML rules require that all elements be closed, either by a separate closing tag or using self-closing syntax (e.g.  ), while HTML syntax permits some elements to be unclosed because either they are always empty (e.g. <input>) or their end can be determined implicitly ("omissibility", e.g. ).
 
 XML is case-sensitive for element and
- attribute names, while HTML is not.
 
 Some shorthand features in HTML are omitted in XML, such as (1) attribute minimization, where attribute values or their quotes may be omitted (e.g. <option selected> or <option selected=selected>, while XML this must be expressed as <option selected="selected">); (2) element minimization may be used to remove elements entirely (such as <tbody> inferred in a table if not given); and (3) the rarely used SGML syntax for element minimization ("shorttag"), which most browsers do not implement.^[13]
 
 There are numerous other technical requirements surrounding namespaces and precise parsing of whitespace and certain characters and elements. The exact parsing of HTML in practice has been undefined until recently; see the HTML5 specification ([HTML5]) for full details, or the working summary (HTML vs. XHTML).
 
 Secondly, in contrast to these minor syntactical differences, there are some behavioral differences, mostly
- arising from the underlying differences in serialization. For example:
 
 Most prominently, behavior on parse errors differ. A fatal parse error in XML (such as an incorrect tag structure) causes document processing to be aborted.
 
 Most content requiring namespaces will not work in HTML, except the built-in support for SVG and MathML in the HTML5 parser along with certain magic prefixes such as xlink.
- JavaScript processing is a little different in XHTML, with minor changes in case sensitivity to some functions, and further precautions to restrict processing to well-formed content. Scripts must not use the document.write() method; it is not available for XHTML. The innerHTML property is available, but will not insert non-well-formed content. On the other hand, it can be used to insert well-formed namespaced content into XHTML.
 
 CSS is also applied slightly differently. Due to XHTML's case-sensitivity, all CSS selectors become case sensitive for XHTML documents.^[14] Some CSS properties, such as backgrounds, set on the <body> element in HTML are 'inherited upwards' into the <html> element; this appears not to be the case for XHTML.^[15]
 
 [edit] Adoption
4 more annotations...
18 Jul 12

William Jones
- namespaces are not allowed in HTML
- Most content requiring namespaces will not work in HTML, except the built-in support for SVG and MathML in the HTML5 parser along with certain magic prefixes such as xlink.
01 Jun 12

Xuan Dong
- XHTML uses an XML syntax, while HTML uses a pseudo-SGML syntax
12 Aug 11

karthikroopkumar
- XHTML was developed to make HTML more extensible and increase interoperability with other data formats
- By shifting to an XML format, it was hoped HTML would become compatible with common XML tools
- servers and proxies would be able to transform content, as necessary, for constrained devices such as mobile phones.
- XHTML and HTML are two different ways of representing that in markup
- XHTML's XML syntax is a little more expressive than HTML
- XHTML uses an XML syntax, while HTML uses a pseudo-SGML syntax
- the XML rules require that all elements be closed,
- XML is case-sensitive for element and attribute names, while HTML is not.
- Some shorthand features in HTML are omitted in XML,
- causes document processing to be aborted
- behaviour on parse errors differ. A fatal parse error in XML
- document.write() method, which is not available in XHTML pages so the scripts fail on pages served as XHTML
- The innerHTML property is available on XML pages
11 more annotations...
26 May 11

danthedane
xhtml Wikipedia reference
19 Apr 11

soniaherce
html
10 Apr 11

ukojpbc
- mirror or extend versions of the widely-used Hypertext Markup Language (HTML)
- XML markup languages
- n application of Standard Generalized Markup Language (SGML)
- HTML documents need to be well-formed
- an application of XML, a more restrictive subset of SGML
3 more annotations...
13 Sep 10

Dante-Gabryell Monson
Because XHTML documents need to be well-formed, they can be parsed using standard XML parsers

web2.0 xml html programming ReQuest
02 Apr 10

Max Limitz
"XHTML (Extensible Hypertext Markup Language) is a family of XML markup languages that mirror or extend versions of the widely used Hypertext Markup Language (HTML), the language in which web pages are written. While HTML (prior to HTML5) was defined as a

xhtml xml internet
12 Mar 10

Chris inCa
XHTML (Extensible Hypertext Markup Language) is a family of XML markup languages that mirror or extend versions of the widely used Hypertext Markup Language (HTML), the language in which web pages are written.

computer terms
17 Feb 10

Stella Porto
xhtml wikipedia html xml
09 Feb 10

ricardozanini
programming reference tutorial design web webdesign wiki internet html guide documentation webdev free language technology xml coding code wikipedia articles w3c standards xhtml markup doctype concepts doctypes encyclopedia itam100 extensible
18 Jan 10

Luka Tolic
Traka oznaka Personal Chrome Bookmarks 2010. 001 Computer Science;Information Science 002 Programming;Programming Languages XHTML
05 Dec 09

Yi Wang
XHTML wiki
23 Oct 09

Ben Garrett
xhtml Help
07 Apr 09

Thành Bùi
XHTML Basic and XHTML-MP
09 Feb 09

Phillip Lee
html wikipedia xhtml
- XHTML
- XHTML
25 Sep 08

muhk
xhtml webdev wiki
17 Aug 08

jeiseman
LI843 XHTML
29 Jul 08

praphul chandra
web
- Because they need to be well-formed, true XHTML documents allow for automated processing to be performed using standard XML tools
- The Extensible Hypertext Markup Language, or XHTML, is a markup language that has the same depth of expression as HTML, but also conforms to XML syntax
- true XHTML documents allow for automated processing to be performed using standard XML tools—unlike HTML, which requires a relatively complex, lenient, and generally custom parser. XHTML can be thought of as the intersection of HTML and XML in many respects, since it is a reformulation of HTML in XML
- The need for a reformulated version of HTML was felt primarily because World Wide Web content now needs to be delivered to many devices (like mobile devices) apart from traditional desktop computers, where extra resources cannot be devoted to support the additional complexity of HTML syntax.^{[citation needed]} In practice, however, HTML-supporting browsers for such constrained devices have emerged faster than XHTML support has been added to the desktop browser
- Another goal for XHTML and XML was to reduce the demands on parsers and user agents in general.
- With HTML, user agents increasingly took on the burden of "correcting" errant documents. Instead, XML requires user agents to give a "fatal" error when encountering malformed XML. In theory, this allows for vendors to produce leaner browsers, without the obligation to work around author errors. A side effect of this behavior is that those authoring XHTML documents and testing in conformant browsers should be more readily alerted to errors that may have gone otherwise unnoticed if the browser had attempted to render or ignore the malformed markup.
- A feature XHTML inherits from its XML underpinnings is XML namespaces.^{[citation needed]} With namespaces, authors or communities of authors can define their own XML elements, attributes and content models to mix within XHTML documents.
- RDFa for embedding RDF data.
- The changes from HTML to first-generation XHTML 1.0 are minor and are mainly to achieve conformance with XML. The most important change is the requirement that the document must be well-formed and that all elements must be explicitly closed as required in XML.
7 more annotations...
11 Mar 08

Tina Hertel
html html_seminar web_design xhtml
01 Mar 08

ioannisth
programming web xhtml
26 Jan 08

Brandon Johnson
xhtml webdesign
31 Dec 07

pnleeson
css xhtml
17 Oct 07

eaglearch
coding WebDev xml xhtml
12 Jul 07

Suvi-Tuuli Allan
articles markup language programming reference Wikipedia
27 Mar 07

Mark pearson
Useful overview of the genesis of XHTML. XHTML 2.0 draft specification is very inteesting.
Of particular value is the Common errors section which outlines where the specification differs radically from HTML 4.01 and gives egs of mistakes.

ITAM100 xhtml WebStandards
14 Feb 07

Konstantin Läufer
cs424 reference xml xhtml
26 Nov 06

avivajazz jazzaviva
The Extensible HyperText Markup Language, or XHTML, is a markup language that has the same expressive possibilities as HTML, but a stricter, more verbose syntax. Whereas HTML is an application of SGML, a very flexible markup language, XHTML is an applicat
07 Nov 06

Vishnu Gopal
imported Interesting delicious_import
07 Aug 06

mazyar hedayat
html microformats web2.0 wiki wikipedia xhtml
02 Mar 06

Daniel Ionescu
xhtml html wikipedia reference web xml webdesign

XHTML - Wikipedia, the free encyclopedia - The Diigo Meta page

DOCTYPEs[edit]

Relationship to HTML

[edit] Adoption

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