Author: Lalana Kagal et al.,
Title: A Policy Based Approach to Security for the Semantic Web
CNF: InProceedings, 2nd International Semantic Web Conference (ISWC2003), September 2003.
OWL-S has been linked to Rei. Rei is a RDF-Schema-based language for policy specification. It is modeled on deontic concepts of
rights, prohibitions, obligations and dispensations. These constructs have four attributes: actor, action,
provision, and constraint. Constraint specifies conditions over the actor, action, and any other context entity
that must be true at invocation. Provisions, which represent the actor’s obligations, describe conditions that
should be true after invocation. These basic constructs allow Rei to represent different kinds of policies,
including authorization, privacy and confidentiality. The class Policy is at the root of the Rei ontology.
Policy has subclasses of PrivacyPolicy, AuthorizationPolicy and ConfidentialityPolicy. Rei’s Policy class is
linked with the OWL-S ontology by defining a new OWL-S description property, policyEnforced, of which
Policy is the range (see www.csee.umbc.edu/~lkagal/rei/examples/ses-sec/swspolicy.owl). Linking OWL-S
with Rei allows specification of privacy, authentication and confidentiality to be specified for service
providers and requesters.