C-HTML
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C-HTML (short for Compact HTML), also called i-mode-HTML,[1] is a subset of the HTML markup language for small information devices, such as smart phones and PDAs, such as DoCoMo's i-mode mobile phones used in Japan. C-HTML dds several features not found in standard HTML, notably accesskeys, phone number shortcuts for links, and emoji pictorial characters as locally extended Shift JIS, all concepts borrowed from HDML/WML.
Because small devices such as cellular phones have hardware restrictions such as lower memory, low power CPUs with limited or no storage capabilities, small mono-color display screens, single-character fonts and restricted input methods (the absence of a keyboard or a mouse), there is a need for a simpler form of HTML.[2]
C-HTML does not support tables, image maps, multiple fonts and styling of fonts, background colors and images, frames, style sheets, and is limited to a monochromatic display.[3]
The language is defined so that all the basic interactive 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. Functionality requiring two-dimensional cursor pointing, like image maps, are excluded from C-HTML.
See also
- Comparison of document markup languages
- Information appliance
- List of document markup languages
- Microbrowser
References
- ^ i-mode service guideline (PDF), NTT DoCoMo, Inc., 2002-03-04
- ^ Kamada, Tomihisa (09-Feb-1998), 2.1. Scope of the Products, W3C, retrieved 2009-04-24
{{citation}}: Check date values in:|date=(help) - ^ Kamada, Tomihisa (09-Feb-1998), 3.1 Design Principles, W3C, retrieved 2009-04-24
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