Comparison of layout engines (XHTML)

The following tables compare XHTML compatibility and support for a number of layout engines.

HTML
Comparisons

Only XHTML 1.1 is considered. XHTML 1.1 is necessarily XHTML 1.0 Strict with more elements and attributes deprecated. XHTML 2.0 was a working draft with no layout engine support, but work on it was abandoned[1] in 2009 in favor of work on HTML5 and XHTML5. 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).

Explanation of tables

See list of layout engines for the full list.

Values

These indicate the level of support for the given item in each engine. By default, the most recent version of the engine is implied. However, a specific version number can be listed; when this indicates full support, it's the initial version of the engine fully supporting the item.

Legend
Value Meaning
Yes Fully supported
No Has never been supported
Partial Only some values are supported
Incorrect Not implemented correctly in all cases
Experimental May be incomplete or buggy
Nightly build Currently in development; full support is expected
Depends Only supported for the specified conditions
Dropped No longer supported

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.

Internet media type Trident Tasman Gecko WebKit KHTML Presto Prince XML
application/atom+xml ? ? ? ? ? 8.00 beta 2[o 1][o 2] ?
application/mathml+xml No No 2.0[g 1] No No 9.50 beta 2[o 3] ?
application/rss+xml ? ? ? ? ? 7.50 beta 1[o 4][o 5] ?
application/xhtml+xml XHTML 5.0 Prompt for download XHTML XHTML
125		 HTML XHTML
1.0		 ?
application/xml XHTML 5.0 Crash XHTML XHTML
125		 XML XHTML
1.0		 ?
application/xslt+xml ? ? ? ? ? 9.00 beta 1[o 6] ?
image/svg+xml ? ? 1.0[g 2] ? ? 9.50[o 7][o 8] ?
text/xml XHTML 5.0 Crash XHTML XHTML
125		 XML XHTML
1.0		 ?
text/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.

Combined profiles

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

Trident Tasman Gecko WebKit KHTML Presto Prince XML
MathML No No 1.0 No[w 1] No 2.1 6.0
SVG 5.0 1.8 522 3.2 1.0 5.1
XForms No No[g 3] No[w 2] No No ?
VoiceXML No No 1.0 No
gollark: White dragons: stop eggs dying of sickness for 6 hours (quite useless)
gollark: Purple dragons: makes breeding more likely.
gollark: Pink dragons: modify chance of it coming out each gender; makes it more likely to be the pink's gender.Aeon Wyverns: show you the gender directly.Red dragons: Incubate BSA, takes a day off an egg's timer.
gollark: It still has no pagination, stupidly, so it's hard to use.
gollark: Click "Trading".

References

Gecko references
  1. Bug 124709 - MIME type application/mathml+xml should be supported, Mozilla
  2. Bug 160882 - MIME type image/svg+xml should be supported, Mozilla
  3. Bug 97806 - (xforms) Implement W3C XForms in browser and composer, Mozilla

Opera references
  1. Feature History, Opera, archived from the original on 2012-09-06, retrieved 2011-12-30
  2. "Opera Features". RSS/Atom. Archived from the original on May 9, 2005.
  3. Feature History, Opera, archived from the original on 2012-09-06, retrieved 2011-12-30
  4. Feature History, Opera, archived from the original on 2012-09-06, retrieved 2011-12-30
  5. "Opera Features". RSS. Archived from the original on August 2, 2004.
  6. Feature History, Opera, archived from the original on 2012-09-06, retrieved 2011-12-30
  7. Feature History, Opera, archived from the original on 2012-09-06, retrieved 2011-12-30
  8. "Opera Features". SVG. Archived from the original on April 14, 2005. Retrieved May 1, 2005.

WebKit references
  1. Bug 3251 - Implement MathML (master bug), WebKit
  2. Bug 10048 - ER: Add support for XForms, WebKit

Other references
  1. "W3C XHTML FAQ".
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