|Knowledge portals provide views onto domain-specific information on the World Wide Web,|
thus facilitating their users to find relevant, domain-specific information. The construction of intelligent
access and the provisioning of information to knowledge portals, however, remained
an ad hoc task requiring extensive manual editing and maintenance by the knowledge portal
providers. In order to diminish these efforts we use ontologies as a conceptual backbone for
providing, accessing and structuring information in a comprehensive approach for building and
maintaining knowledge portals. We present one research and one commercial case study that
show how our approach is used in practice.