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After converting objects are already of the specified type. If you ask for :int - you will get integer (not a string). No need to preserve type information. Hi,

Thanks for your quick answer. I suppose I won't need to get the type information itself. But how do I find out what the type of the object is, ie get a string I can pass to manage_addProperty as type parameter?

Ah, that's more trickier. Probably, Python builtin function "type()", but it is noot available in DTML - only in Products and External Methods.

Yes, type() doesn't work from ZClasses, where I need it. I'm pretty sure there is some kind of equivalent for type in Zope, but I can't remember where I came across it. Anybody else remember something? To test whether something was a string you had to type something like if TypeOf(aThing)==TypeOf('dummy'): Douwe