I'm not sure I follow your meaning. The WWW's WAISGate stuff works
just fine _without_ the list's presentation being collapsible.
With it, however, the search output might be easier to use, in that
the output could then be presented with less clutter. That is, the
"most relevant" search results would be plainly shown, but the
"less relevant" search leads could be folded, to be further expanded
only if the user wants to follow those links.