The document describes ViBRANT, a semantic mediawiki platform for developing controlled vocabularies. It allows terms to be organized into schemes and collections, with each term on its own page. The platform is multilingual and terms can be edited via forms or wiki syntax. It also features discussions pages, translation forms, watchlists, autogenerated vocabulary overviews, and browsing/drilldown of terms. The proposed URL for the platform is http://terms.tdwg.org.