Supported Syntaxes for Request and Form tokens are:
1. QueryString:(param1) or Form:(param1)
2. QueryString:param1 or Form:param1
3. QueryString:(param1).SomeOtherTextToken or Form:(param1).SomeOtherTextToken
If you want to Chain TextTokens you have to use the 3rd syntax
the element (here param1) has been surrounded with brackets in order to preserve backward compatibility.