Ontology-based
information seeking is one of the most promising approaches to
enhance existing search interfaces with features enabling users
to better express their information needs or to improve exploratory
search styles. This entails the interaction of users with concepts
and relations embodied in ontologies in a dialogue process that
can be interpreted as a query or used as a sign to suggest other
paths that could lead to casual encounters. In this paper, we
describe a number of ontology-enabled search tactics that have
been experienced in prototype experiments, along with other possible
techniques that would eventually be useful, as pointed out by
existing research on information seeking models.