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The following tables compare HTML 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 HTML 4 and XHTML 1 served as text/html (so called "HTML compatible" XHTML) are considered. XHTML 2 is not considered as it is a redefinition of XHTML, which is not backward compatible. For more XHTML-related comparisons, please refer to comparison of layout engines (XHTML).Version number, if possible, is provided for feature that is fully supported (based on HTML 4.01). Proprietary extensions are not included. NB: Engine Nomenclature DOCTYPE sniffing The way that the engines determine standards mode, quirks mode, or almost standards mode. General DOCTYPE sniffing notes Gecko DOCTYPE sniffing notes Global structure elements The global structure of the document. Text elements Elements that represent text. Gecko text element notes List elements Elements that represent lists of information. Table elements Elements that represent tabular information. Link elements Hyperlinks, one of the primary forces driving the success of the World Wide Web. Multimedia elements Multimedia features including images, applets , video clips, and other HTML documents. Trident multimedia element notes Frame elements Elements to present documents in multiple views, which may be independent windows or subwindows. Frame layout is only available in the frameset profiles. All frames are not available in XHTML 1.1 (use generic object elements instead for inline frames). Form elements The user interface controls for interacting with the web server. WebCore form elements notes KHTML form elements notes Presentational elements Elements that specify presentational information. Although not all elements are deprecated, their use is discouraged in favor of stylesheets. Deprecated elements are not available in the strict profiles and XHTML 1.1. Stylesheet elements The ways to apply stylesheets (CSS) to the document. Script elements Elements for embedding client-side script (JavaScript). See also DOM Events for a list of attributes used to attach an event handler to an element. Language elements Elements related to language information. KHTML language element notes Generic attributes Attributes that can be used in any elements. See also | |||||||
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