ISSN : 1796-2056
Volume : 3    Issue : 4    Date : April 2008

The Necessity of Semantic Technologies in Grid Discovery
Serena Pastore
Page(s): 1-9
Full Text:
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Service discovery and its automation are some of the key features that a large scale, open
distributed system must provide so that clients and users may take advantage of shared resources.
Most actual distributed systems are built with several middleware applications developed by using
grid and web service technologies that allow an infrastructure to be implemented where users work
as if they were in a local system. The paper, starting from the work done within grid projects in which
the INAF Institute was involved, examines issues encountered and solutions proposed in the optics
of sharing and thus using web resources such as web services in a specific grid system. By
guaranteeing the efficient use of such resources, different discovery mechanisms, developed within
grid and web service areas, have been evaluated. The results show the necessity of an appropriate
resources’ description in terms of the information data model, protocol and search tools that could
integrate semantic technologies required for automating the process. Enabling automatic discovery
means both the enriching of description with one of the semantic languages that are in constant
development (i.e. OWL-S, WSDL-S) and the availability of a mechanism able to interpret and
process such information. This work aims at taking advantage of the improvement in semantic
technologies to prove the efficacy of this approach in making use of applications that need a grid
environment for their execution.

Index Terms
service discovery, grid technologies, web services, semantic web services, UDDI, SOAP-based web
service, REST-style, semantic discovery, OWL-S, WSLD-S.