Compact HTML (CHTML or cHTML) is a subset of standard Hypertext Markup Language (HTML) adapted for use with small computing devices such as personal digital assistants (PDAs), cellular phones, and smartphones. Access Company Ltd., a Japanese company, developed Compact HTML for use with i-Mode devices. Because handheld devices have display constraints, and limited power, storage, and memory resources, Compact HTML was created as a stripped-down version of the standard, excluding support for the more demanding features of HTML pages, such as image maps, backgrounds, varieties of fonts, frames , style sheets, and JPEG images.
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Compact HTML includes support for GIF images, and uses four buttons for operation, rather than two-dimensional cursor movement. Scrolling is not featured, because it is assumed that pages properly designed will fit the screen. Because Compact HTML is based on the universally used standard, it will enable small devices to connect to the open Web, rather than merely a section of it. It is expected that, in the future, several different levels of Compact HTML will be developed to adapt to the requirements of different applications.