[Zope] Add properties to ZClass instance?

[Paul Godley]

I've got a ZClass to which I'd like to add (variable) properties when
the instance is created. I made a "Basic" propertysheet and tried
"manage_addProperty" but Zope reports that properties cannot be added. I
can add properties to DTML Documents.

Can you construct a ZClass such that you can add properties to an
instance, both via management screens and programatically?

Thanks.

-P

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Technology Concepts & Design, Inc.=20