XML Repository and Active Views Demonstration. - Serge Abiteboul; Vincent Aguilera; Sébastien Ailleret; Bernd Amann; Sophie Cluet; Brendan Hills; Frédéric Hubert; Jean-Claude Mamou; Amélie Marian; Laurent Mignet; Tova Milo; Cássio Souza dos Santos; et al. (VLDB, 1999)