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StyleGuide

Check DTMLMethod? Parameters

When a dtml method is being used like a python method, it should start by checking required parameters are present.

For example: 

   <dtml-unless parameter1>
   <dtml-raise ParameterNotFound>
       Please make sure you pass parameter1.
   </dtml-raise>
   </dtml-unless>

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If you can read this text, it means you are not experiencing the Plone design at its best. Plone makes heavy use of CSS, which means it is accessible to any internet browser, but the design needs a standards-compliant browser to look like we intended it. Just so you know ;)