C-HTML

This article or section has multiple issues. Please help improve the article or discuss these issues on the talk page. It needs to be expanded. Tagged since March 2008. It contains predictions, speculative material or accounts of events that might not occur. Please help improve this article or section by removing speculative content. (March 2009) Tagged since March 2008.

Evolution of mobile web standards

C-HTML (for "Compact HTML") is a subset of the HTML markup language that works on DoCoMo's i-mode mobile phones used in Japan. C-HTML also adds several additional features not found in standard HTML, notably the accesskeys, phone number shortcuts for links, and emoji pictorial characters as locally extended Shift JIS, all concepts borrowed halfway from HDML/WML.

HTML
HTML and HTML 5 Dynamic HTML XHTML XHTML Mobile Profile and C-HTML Character encodings Font family HTML editor HTML element HTML scripting Layout engine Quirks mode Style sheets Unicode and HTML W3C Web colors Comparison of document markup languages web browsers layout engines for HTML HTML 5 Non-standard HTML XHTML
This box: view • talk • edit

Short for compact HTML, a subset of HTML for small information devices, such as smart phones and PDAs. cHTML is essentially a pared down version of regular HTML over the Internet. Because small devices such as cellular phones have hardware restrictions such as small memory^[1], low power CPUs^[1], limited or no storage capabilities^[1], small mono-color display screens^[1], single-character font^[1] and restricted input methods (the absence of a keyboard or a mouse)^[1], there is a need for a simpler form of HTML.

Because of the limitations of small information devices, cHTML does not support JPEG images, tables, image maps, multiple fonts and styles of fonts, background colors and images, frames, style sheets and more than two colors, typically black and white.^[2]

cHTML is defined so that all the basic operations can be done by a combination of four buttons and not by two-dimensional cursor movement: cursor forward, cursor backward, select, and back/stop. The functions that require two-dimensional cursor pointing, like "image map" and "table," are excluded from cHTML.

cHTML was created by Japan-based Access Company, Ltd. for use in i-mode devices, and was accepted by the W3C mobile group in 1998. cHTML has been fading into obsolescence as XHTML gains acceptance and replaces cHTML.

See also

• Comparison of document markup languages
• Information appliance
• List of document markup languages
• Microbrowser

References

1. ^ ^{a b c d e f} Kamada, Tomihisa (09-Feb-1998). "2.1. Scope of the Products". W3C. http://www.w3.org/TR/1998/NOTE-compactHTML-19980209/#www2-1. Retrieved on 2009-04-24. 
2. ^ Kamada, Tomihisa (09-Feb-1998). "3.1 Design Principles". W3C. http://www.w3.org/TR/1998/NOTE-compactHTML-19980209/#www3-1. Retrieved on 2009-04-24. 

External links

• Compact HTML for Small Information Appliances — W3C NOTE 09-Feb-1998
• What is cHTML? - A Word Definition From the Webopedia Computer Dictionary