[Zope] Tree tag and lists.

I want to create a bullet list with the tree tag. My idea is to have a list of topics which can be expanded and collapsed. Each time the user clicks on a collapsed node, a text will be shown. My problem is that I don't know how I can use this tag with a list, ie: [['Title1','description1'],['Title2','description2'],...,['Titlen','descriptionn']] Does somebody have an idea? Thanks in advanced, Josef.