Information Technology Journal 1812-5638 1812-5646 Asian Network for Scientific Information 10.3923/itj.2013.2454.2459 Luo Yonghong Yu Zhou Zhuang Yanhao Zheng Zhaopeng 12 2013 12 12 In grid computing environment, we can create a global ontology for multiple local ontologies to integrate geographically distributed data sources. However, some data sources are likely to dynamically join and quit grid environment. Thus, it is very important for data semantic access to build dynamic mapping relation between global ontology and local ontologies. In this study, we present mapping algorithms of joining and quitting for data sources in grid system. When a new data source joins grid system, elements mapping between global ontology and its local ontology can be rapidly established through using the method of subtree interception and the corresponding global elements should be added to active elements set. During processing of quitting algorithms, elements mapping between global ontology and the quitted ontology should be canceled and the corresponding global elements need to be move to suspended elements set. In semantic data operation, we regulate only mappings generated from active elements set can be employed for data semantic query. Experimental results show that proposed algorithm effectively fulfils dynamic mappings between global ontology and local ontologies and improves the accuracy of user semantic query in grid environment.

]]> 1 Foster, I. and C. Kesselman, 1999 The Grid: Blueprint for a Future Computing Infrastructure. 2 Rubiolo, M., M.L. Caliusco, G. Stegmayer, M. Coronel and M.G. Fabrizi, 2012 Inf. Sci., 194 107 119 3 McBrien, P. and A. Poulovassilis, 2003 Proceedings of the 19th International Conference on Data Engineering, 2003 pp: 227 238 4 Qasim, I. and S. Khan, 2009 Proceedings of the 2nd International Conference on Computer, Control and Communication, 2009 pp: 1 5 5 Zuofu, Z., X. Chao amd G. Hongmei, 2011 Proceedings of the International Conference on Internet Technology and Applications, 2011 pp: 1 4 6 Pirro, G. and D. Talia, 2010 Data Knowledge Eng., 69 444 471 7 Mao, M., Y. Peng and M. Spring, 2010 Web Semant., 8 14 25 8 Kros, J.F., M. Lin and M.L. Brown, 2006 Comput. Oper. Res., 33 3136 3149 9 Chen, T.Y., F.C. Kuo and R. Merkel, 2004 Proceedings of the 4th International Conference on Quality Software, 2004 pp:146 153 10 Park, S. and W. Kim, 2007 Int. J. Electron. Commerce, 12 69 87 11 Jean-Mary, Y.R., E.P. Shironoshita and M.R. Kabuka, 2009 Web Semant., 7 235 251