Comparison of layout engines (XHTML)

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The following tables compare XHTML compatibility and support for a number of layout engines. Please see the individual products' articles for further information. This article is not all-inclusive or necessarily up-to-date. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.

Only XHTML 1.1 is considered. XHTML 1.1 is necessarily XHTML 1.0 Strict with more elements and attributes deprecated. XHTML 2.0 is still a working draft with no layout engine support. XHTML 1.0 and HTML 4 (both served with text/html) are covered in comparison of layout engines (HTML). The comparison of XML capabilities are covered in comparison of layout engines (XML).

Version number, if possible, is provided for feature that is fully supported. Proprietary extensions are not included.

Contents 1 Explanation of the tables 1.1 Engine nomenclature 1.2 Values 2 Media types 2.1 KHTML media type notes 2.2 iCab media type notes 3 Combined profiles 3.1 Gecko combined profile notes 4 References

Explanation of the tables

Engine nomenclature

Rather than the names of web browsers, the names of the underlying engines are used. The browsers that use the various engines are listed below.

Layout Engine	Used By
Trident	Internet Explorer 4 to Internet Explorer 8
Tasman	Internet Explorer 5 for Mac
Gecko	All Mozilla software, including Firefox; Galeon; Flock; also Epiphany
WebKit	Safari; Shiira; iCab 4; Epiphany; Adobe Air;
KHTML	Konqueror
Presto	Opera; Nintendo DS Browser; Internet Channel; future Adobe products
iCab	iCab 1-3
Prince XML	Prince XML
Amaya	Amaya

Values

Values indicate the level of support in the most recent version of the layout engine, or (if a version number is given) in the specified version. Version numbers without any other value indicate the version at which the layout engine first fully supported the feature.

Value	Meaning
Yes	Indicates that the layout engine fully supports this property when valid values are used.
No	Indicates that this property is completely ignored.
Partial	Indicates that the property is understood, but that not all values are supported. Supported values are implemented correctly.
Incorrect	Indicates that the property is understood, but that it is not implemented correctly in all cases.
Experimental	Indicates that the property is provided in experimental form under an alternative name, generally with only partial functionality.

Media types

The responses when a well-formatted XHTML document is served with different media types. Note that only application/xhtml+xml is the recommended media type.

	Trident	Tasman	Gecko	WebKit	KHTML	Presto	iCab	Prince XML
application/xhtml+xml	Prompt for download	Prompt for download	XHTML	XHTML	HTML	XHTML	(X)HTML	?
application/xml	XML	Crash	XHTML	XHTML	XML	XHTML	Text	?
text/xml	XML	Crash	XHTML	XHTML	XML	XHTML	Text	?
text/html	HTML	HTML	HTML	HTML	HTML	HTML	HTML	?

KHTML media type notes

1. application/xhtml+xml — KHTML supports this media type, but processes the document as HTML.
2. application/xml, text/xml — HTML entities and custom entities defined by custom DTD are not recognized.

iCab media type notes

1. application/xhtml+xml — Type selector in CSS is matched case-insensitively.

Combined profiles

Extending XHTML by combining with other applications of XML (not referring using img/object element).

	Trident	Tasman	Gecko	WebKit	KHTML	Presto	iCab	Prince XML
MathML	No	No	1.0	No	No	9.5	No	6.0
SVG	No	No	1.8	522	3.2	8.0	No	5.1
XForms	No	No	No †	No	No	No	No	?
VoiceXML	No	No	No	No	No	8.0	No	No

Gecko combined profile notes

• ^  XForms is supported experimentally in nightly builds dated after January 28, 2005 [1]. Requires installation of an extension.

References

• "W3C". XHTML media type test. Retrieved on May 1, 2005.
• "the mozilla.org projects list". MathML in Mozilla. Retrieved on May 1, 2005.
• "the mozilla.org projects list". Mozilla SVG project. Retrieved on May 1, 2005.
• "the mozilla.org projects list". Mozilla XForms project. Retrieved on May 1, 2005.
• "Opera Features". SVG. Retrieved on May 1, 2005.
• "Developer's corner". Authoring XHTML+Voice. Retrieved on May 1, 2005.

v • d • e Layout engines List of layout engines Amaya · Boxely · Gecko · GtkHTML · Gzilla · iCab · KHTML · Mariner · NetSurf · Robin · Tasman · Tkhtml · Trident · Presto · Prince · WebKit Comparison of layout engines HTML · XML · XHTML · Graphics · CSS · DOM · HTML 5 · ECMAScript · SVG · Deprecated and proprietary Tags and Atrributes

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