Standard 51.0.1 / January 26, 2017; 35 days ago (2017-01-26) ESR 45.7.0 / January 24, 2017; 37 days ago (2017-01-24) | ||
The following tables compare XHTML compatibility and support for a number of layout engines. Please see the individual products' articles for further information. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.
Contents
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 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).
Version number, if possible, is provided for feature that is fully supported. Proprietary extensions are not included.
Engine nomenclature
Rather than the names of web browsers and HTML to PDF converters, the names of the underlying engines are used. Some of the software and online converters that use the various engines are listed below.
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.
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.
KHTML media type notes
- application/xhtml+xml — KHTML supports this media type, but processes the document as HTML.
- 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).