C-HTML
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C-HTML (for "Compact HTML") also called i-mode-HTML by NTT DoCoMo (http://www.nttdocomo.com/binary/technologies/imodetechnology_guideline2002030.pdf) 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.
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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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Kamada, Tomihisa (09-Feb-1998). "2.1. Scope of the Products". W3C. http://www.w3.org/TR/1998/NOTE-compactHTML-19980209/#www2-1. Retrieved 2009-04-24.
- ↑ Kamada, Tomihisa (09-Feb-1998). "3.1 Design Principles". W3C. http://www.w3.org/TR/1998/NOTE-compactHTML-19980209/#www3-1. Retrieved 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
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