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The altSyntax changes the behavior of how tags are interpreted. Instead of evaluating each tag parameter against the value stack and needing single quotes to mark string literals, only marked expressions are evaluated in altSyntax.

Example:

the following code uses the Tag Syntax:

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Only expressions enclosed with %{} are evaluated. The code is shorter and clearer, very similar to JSTL EL usage. Quoting problems, eg. with to javascript function calls, are avoided.

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