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Typically weblets are used to visualize data on a web page. For example standard weblets are provided to visualize a field as a checkbox or a radio button, or a working list could be visualized as a dropdown list or a tree. There are also standard weblets provided for formatting the layout of a web page, message presentation, menus and other elements commonly included on web pages that are not specifically related to data on the interface. Additional non-visualized weblets are provided to give access to commonly required information, for example the variables and style weblets (which are described in 2.5 Variables and 2.7 Cascading Style Sheets (CSS) and the Style Weblet).