Haralambos Papageorgiou Fragkiskos Pentaris Eirini Theodorou Maria Vardaki Michalis Petrakos A Statistical Metadata Model for Simultaneous Manipulation of both Data and Metadata. 169-192 2001 17 J. Intell. Inf. Syst. 2-3 db/journals/jiis/jiis17.html#PapageorgiouPTVP01