Brief account of multilayer portal model for information grid
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University Digital Museum Grid (UDMGrid) is a typical system of information grid, whose portal is to seamlessly access digital specimens by a one-stop information service. Based on information grid, semantic web and portal model, this paper presents a multilayer portal model for information grid. It is composed of six layers, including grid resource layer, grid service layer, portlet service layer, portlet layer and user layer. The application of this multilayer portal model in UDMGrid demonstrates its usability, maintainability and expansibility.