[Zope] property/selection/value

[Andreas Rippel]

Hi,
there is this option for a folder to add some properties with standard types, like boolean, date etc.
Is there a way for (multiple) selection not only to define the displayed text for each popup-entry,
but also the "value" for the generated option-tag or the "name" of the select-tag?
Where do these defined properties live within zope, and how can I access and manipulate  them directly?

Andreas