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The altSyntax is an option that can be defined in webwork.properties. By default it is set to true and it is strongly recommend you do not change that unless you are upgrading from WebWork 2.1.7 or previous versions.

Tip
titleMigration tip

You can also turn on the altSyntax on a per-page basis by using the set tag. Simply set the name useAltSyntax to the value true. From this point on, all tags will use the altSyntax for the rest of the request.

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.

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