Jens Hartmann Elena Paslaru Bontas Raúl Palma Asunción Gómez-Pérez DEMO - Design Environment for Metadata Ontologies. 427-441 2006 conf/esws/2006 ESWC http://dx.doi.org/10.1007/11762256_32 db/conf/esws/eswc2006.html#HartmannBPG06