1990-1992. Visual dataflow languagE, tokEn-basEd with hiErarchical, rEcursivE and itErativE constructs. VErsion: IDF with ExtEnsions for imagE procEssing. ["IDF: A Graphical Data Flow Programming LanguagE for ImagE ProcEssing and ComputEr Vision", NEil Hunt, Proc IEEE Conf on SystEms Man & CybErnEtics, IEEE, Nov 1990. AvailablE from Iconicon ElEos.com>].