<value><string>python: [(x.getTitle(), x.getRelativeUrl()) for x in here.getParentValue().getParentValue().contentValues(portal_type="Variable")]</string></value>
<value><string>python: [(x.getTitle(), x.getRelativeUrl()) for x in here.getParentValue().getParentValue().contentValues(portal_type="Workflow Variable")]</string></value>