Go to any property sheet and an explanatory blurb appears which ends with an explanation of selection variables: For "selection" and "multiple selection" properties enter the name of a selection variable in the "Value" field. The selection variable is a property or method that returns a list of strings from which the selection(s) can be chosen. Grabbing the list from an acquired property (call it "Choices") of type "lines" works but I'm having two difficulties. 1) As per suggestions, I have created a "globals" folder in my zope root to which I have added a number of needed properties, including Choices. (Previously I had set these properties in the root which cannot be easily moved to another Zope site.) Is it possible to reference Choices in the value field of a selection box property? 2) I created a simple root level DTML method GetChoices to return a list of strings: <dtml-with globals><dtml-var Choices></dtml-with> Rendering this method yields: ['choice1','choice2','choice3'] but looks like a python list but obviously Zope feels differently when GetChoices is used as the value field when trying to add a selection property: Zope Error Zope has encountered an error while publishing this resource. Error Type: InError Error Value: Strings are not allowed as input to the in tag. Method 2 is less than optimal because it means I need to clutter up my root with these one-line methods that simply return a list of choices for a single selection box. I'd rather be able to reference a property in the globals folder. That said, for future reference I would like to know how to write a selectionlist method. As always, any help is much appreciated. Cheers, Darran.