[Back]

S. Dustdar, M. Treiber:
"WiZNet- Integration of different Web service Registries";
Report No. TUV-1841-2004-18, 2004; 40 pages.

Despite all standardization efforts in the Web service area, several
different incompatible Web service registry implementations exist. The initial
focus of these implementations was geared towards working with a centralized
Universal Business Registry (UBR). However, these centralized approaches
tend to be bottlenecks regarding performance and fault tolerance. A proposed
solution is the replication of registry information among multiple distributed
Web service registries. In addition, the creation of specialized Web service
registries leads to a large number of different Web service registries. This leads
to a situation where the search for a particular Web service becomes a very
complex task. Besides, Web service provisioning includes a considerable
administrative overhead when dealing with transient Web services. Transient
Web services exist only for a limited lifetime and in a certain context. In this
paper, we propose the WiZNet peer to peer architecture for the transparent integration
of multiple Web service registries and transient Web service providers.
This work focuses on the integration concept of multiple Web service registries
and transient Web service providers. The integration concept relies on so-called
views. Views provide the needed abstractions for the seamless integration on
the different registries. Views use common lightweight Web service profiles
that serve as unified global data model. WiZNet Web service profiles allow the
flexible extension of registry entries with value added information without
changing the original Web service registry entries. To illustrate the view concept,
we introduce a simple grammar (View Description Language) for view
descriptions that is used in the working example throughout the paper. We
present Web service communities as a possible application of the view concept
and show how different types of Web services providers respectively their
registries are integrated into a unified global data model.

Web service Discovery, Web service Registry Integration, Distributed Web service Registry