[Zope] question about string manipulation and tal:attributes

[Garito]

Laura McCord wrote:

>I need to concatenate strings is this a way I can do it?
>resString is a variable that contains a string.
>
><DIV tal:attributes="id string:$resString + 'Parent'">
>
>thanks.
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I use
<div tal:attributes='id string:${resString}Parent'>

If you use string: zope assumes the sentence is a string and with ${} 
zope assumes you are referencing an object