DREBES, R. C.; http://lattes.cnpq.br/1761571447956461; DREBES, Rute Cardoso.
Resumo:
The rise of semantic services and their use has been the subject of intense research in
recent years. In this context, ontologies are used as structures of knowledge
representation, to facilitate reuse and sharing of information However, the multiplicity
in the semantic description of services, difficulty in reaching consensus on the definition
of domain ontologies and the use of different perspectives present an obstacle to
automate service related tasks.
Service provision consists on a complex process, composed of several subactivities,
such as publication, discovery, negotiation, selection, composition, execution
and monitoring However, the work accomplished was focused on the discovery,
negotiation, selection and service monitoring phases. Aiming to achieve a better
understanding of the questions raised from each one of the phases, a study based on the
music industry was conducted. A survey of service conditions indicates the need of
using new business models and new strategies that may enable the customization of
services, giving users a more active role in the process.
To deal with the drawbacks found in the service oriented scenario, an
integrated approach was used, that unites two models: one, focused on user perception
and the other focused on the service provision phases. The models used in the integrated
approach are Escher and Persona;, respectively. The resulting model of this approach
was named extended model, and it unites the expressiveness of Escher to the service
provisioning phases addressed in Persona;. Acknowledging that the model Persona;
addresses the initial phases in the service provisioning lifecycle, the phases of
negotiation, monitoring and contracts re-negotiation were added to the extended model.
The presented approach, named the integrated approach, enabled to perceive
that the main concepts related to the service provisioning domain were addressed. The
use of two scenarios to illustrate the applicability of the extended model was effective to
demonstrate the capability of the model to meet the needs of either kind of user, a nonexpert
and an expert user, on the tasks related to service provisioning on the web.
