Study On Ontology-based Service Matching In Grid Environment

With the rapid development of global economy, flexible business composition has been a main operation mode within enterprises in present environment of network business. By connecting heterogenous systems or companies located geographically or logically separately together, companies can share their resources, increase their abilities of communication and cooperation, respond the changes of costumers flexibly in order to make enterprises decrease the cost, increase the efficiency and enhance the advantage of competition.In this paper, a system of Enterprise Flexible Composition Service Grid (EFCS-Grid) is discussed. Firstly, in terms of the demand of the system, the general framework of EFCS-Grid system is put forward. Then, the function of components in this system is introduced in brief and the issue of ontology-based service matching is discussed detailedly.Much research is done on construction and application of ontology in this paper. The corresponding ontology knowledge is constructed for service grid. The ideas of ontology and OWL (Web Ontology Language) are applied to establish a uniform abstract concept model and standardization for grid services. To resolve the problem of incompletion of ontology, the conception of complete ontology for relatively closed system is put forward and the mechanism of self-learning is added into ontology for increasing the usability and feasibility of ontology.In view of the large amount of different services in grid, the services in system are classified and stored by different ontology domains. At the same time, context-based domain selection algorithm and ontology-based service matching algorithm are proposed in the process of service matching, which increases the matching efficiency and precision.In order to resolve the heterogeneity among services in grid, domain modular services are defined for each ontology domain. When service...