[Zope] - Structured-text

I've just started with Zope and have not programmed anything in Python (yet). I'm just exploring/learning DTML but am a bit frustrated by the lack of good tutorial (for dummy's like me). In one of the postings to this maillinglist I saw mentioned the use of the following tag <!--#var body fmt="structured-text"-->, and looked in the source code for StructuredText.py. I think I understand how to format plain text as structured text, but don't understand how to insert it in a document. Is the only possibility the use of forms ? Can somebody please give me an example. Wiebe Kunst