[Zope] <dtml-with> confusion

[Chris Withers]

Can someone explain the difference between:

<dtml-with "PARENTS[-1]">
 <dtml-with squishdot>
 ...do stuff here...
 </dtml-with>
</dtml-with>

and

<dtml-with "PARENTS[-1].squishdot">
 ...do stuff here...
</dtml-with>

cheers,

Chris