METADATA EXPANDED SEMANTICALLY BASED RESOURCE SEARCH IN EDUCATION GRID

摘要

Educationalresourcesaretheinfrastructureof distanceeducation.Ononehand,mostofeduca tionalresources(suchastext,images,audio,vide o,courseware,…,etc)existintheformoffiles.Thesefileshavethecharacteristicsofbeinghugea mountwhicharefromkilobytestogigabytes,in creasingcontinually,andbeinggeographicallydis tributedalloverChina.Ontheotherhand,thereis alackofinteroperabilitybetweenheterogeneousand complexeducationalresources.Largeamountsofre sourcesbecomeadiscreteandisolated"information isle".Inordertoacquirethereso...