[Zope] How to convert structured text into plain text

[Nuno Maltez]

Hi,

I know that <dtml-var xxx fmt="structured-text"> converts structured text into
HTML, and I know how to call this from a python script/external method.

Now, is there a method somewhere in Zope's classes that return a plain
text version of the stx string? With all the special characters and sequences
stripped off.

Thanks in advance,
Nuno