Viper
(Not Related to a Specific Release) - ...
A viper is defined as a vipermethod call enclosed by curly brackets.
For example, the viper below will be resolved to 'HELLO' when the SXML is executed during page rendering.
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{string.toupper('hello')} => HELLO
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Vipers are executable elements; their content will be resolved during de rendering of the page.
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{string.toupper(string.trim(' hello world '))} => HELLO WORLD
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