[Zope] how to pass <dtml-var sequence-item> to an external method from D TML?

[J. Cameron Cooper]

>
>
><dtml-in getPropNames>
>  <dtml-var sequence-item> <dtml-var getPropDescription("<dtml-var
>sequence-item>")>
></dtml-in>
>
>Which throws the message:
>    Invalid attribute name, """, for tag <dtml-var
>getPropDescription("<dtml-var sequence-item>")>
>
DTML can either use things in its namespace or expressions, which are 
little bits of Python. DTML is, unsurprisingly, not parsed in expressions.

You're familiar with things like <dtml-var property>. Expressions are 
like <dtml-var expr="arbitrarystuff()">, which is also exactly like 
<dtml-var "arbitrarystuff()">, but shorter. Those are the only ways to 
call things in DTML. You can't mix and match, lest you drive the parser mad.

In your case, it would be::

   Fool, the properties and thier descriptions are
   <dtml-in getPropNames>
      <dtml-var sequence-item> <dtml-var 
"getPropDescription(sequence-item)">
   </dtml-in>. Ha!

            --jcc
        (foolha?)