Thank you for your inputs. As suggested, what I'm working on is a
wiki based on mediawiki, one component of which will be an
encyclopedic-type collection of sustainable development terminology,
another which will be a case studies database. I think I will create
a case_studies namespace for the case studies, since I like logical
organizational separations of data and there doesn't seem to be a
compelling reason not to do so.
It hadn't even occured to me that the term might be trademarked -
thanks for the heads-up. So I will avoid using the term 'wikipedia' -
perhaps a wiki-glossary? Doesn't have the same ring to it though I
must say :).