Recent developments in the field of Grid computing reveal the strong need of managing metadata on much higher level than it used to be done previously. Standard solutions like MDS provide relatively efficient means of managing Grid resources on a low level basis, usually available for Grid experts and simple search tools. However in order to manage resources among multiple Virtual Organizations composed of highly heterogeneous entities, joining and leaving the Grid in a dynamic manner, a more flexible way of describing and managing their resources is required. In this paper, a solution to this problem based on ontologies and distributed knowledge base is presented. The knowledge base distributed architecture is discussed with the flexibility and fault-tolerance outlined. The performance evaluation for typical use cases shows, that ontology separation and various configurations of GOM make it useful for managing knowledge in multiple domains.
"The GOM knowledge base  stores all the necessary information in a unified semantic form. This includes several semantic registries storing information about the organizations assets, resources and competencies, as well as registries for particular VOs, where information related to contract and its fulfillment is tracked. "
[Show abstract][Hide abstract] ABSTRACT: Nowadays, with the broadening usage of distributed systems and Grid, the need for cooperation between many different heterogeneous organizations occurs. Such cooperation usually requires sharing of access to data, service and other tangible or intangible resources. To accomplish such cooperative efforts between organizations, an idea of the Virtual Organization (VO) emerged. It allows the organizations to share resources between the partners, while enforcing proper quality of service and security. In order to enable creation of such Virtual Organization, it is necessary to allow the participants of the VO to negotiation an agreement concerning the rules of cooperation, which will be encoded in a machine processable format. In this paper we present the application of the ESB integration architecture in the specialized distributed contract negotiation service - the FiVO DCNS, which is responsible for distributing contract negotiation events and queries between components of FiVO deployed in different organizations.
"current read/write ratio, to find an optimal element. As a knowledge base, the Grid Organizational Memory (GOM)  service has been used. It provides methods for accessing an ontology-based model remotely. "
[Show abstract][Hide abstract] ABSTRACT: In this paper we describe a semi-automatic programming framework for supporting users with managing the deployment of distributed applications along with storing large amounts of data in order to maintain Quality of Service in highly dynamic and distributed environments, e.g., Grid. The Polish national PL-GRID project aims to provide Polish science with both hardware and software infrastructures which will allow scientists to perform complex simulations and in-silico experiments on a scale greater than ever before. We highlight the issues and challenges related to data storage strategies that arise at the analysis stage of user requirements coming from different areas of science. Next we present a solution to the discussed issues along with a description of sample usage scenarios. At the end we provide remarks on the current status of the implementation work and some results from the tests performed.
[Show abstract][Hide abstract] ABSTRACT: This paper presents a brief overview of the work on translation of Common Information Model (CIM) to Web Ontology Language
(OWL) standard. The main motivation for the work is given, along with discussion of major issues faced during this work. The
paper contains also comparison of existing approaches to conversion of CIM to OWL and presents the CIM2OWL tool that performs
the conversion of CIM schema and allows convertion of CIM instances - representing for instance configurations of particular
systems - to OWL individuals.
Computational Science - ICCS 2007, 7th International Conference Beijing, China, May 27-30, 2007, Proceedings, Part I; 01/2007
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