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The altSyntax is an option that can be defined in webwork struts.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.

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the following code uses the Tag Syntax:

<ww<s:iterator value="cart.items">
   ...
   <ww<s:textfield label="'Cart item No.' + #rowstatus.index + ' note'" 
                 name="'cart.items[' + #rowstatus.index + '].note'" 
                 value="note" />
</wws:iterator>

this is somewhat counter intuitive to normal HTML tag behaviour, and you get loads of single quotes. Now the same example in altSyntax:

<ww<s:iterator value="cart.items">
   ...
   <ww<s:textfield label="Cart item No. %{#rowstatus.index} note" 
                 name="cart.items[%{#rowstatus.index}].note" 
                 value="%{note}" />
</wws:iterator>

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

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