The tourism product has an intangible nature in that customers cannot physically evallfate the
services on offer until practically experienced. This makes having access to ;credible;"i\nd
authentic information about tourism products before the actual experience very valuable. An
Ontology being a formal, explicit specification of concepts of a domain provides a viable
platform for the development of credible knowledge-based tourism information services. In this
paper, we present an approach aimed at enabling assorted intelligent reco=endations services
in tourism support systems using ontologies. A suite of tourism ontologies was developed and
engaged to enable a prototypical e-tourism system with various knowledge-based
reco=endation capabilities. A usability evaluation of the system yields encouraging results as
a demonstration of the viability of our approach
