To do so, we will produce such a virtualization concept in which the user would feel as if he or she were locally manipulating the remote-site RDB from a local RDB process environment. That can be accomplished by converting the schema information and data information of the local RDB into the XML schema, and then storing that information into the RDB that the user would like to operate. We developed an XML conversion program, XMLExport/Import, as depicted in Figure2. We then used such different vendor RDBs as MySQL, PostgreSQL, and SQLServer2005 because they are available in the RDB virtualization system creation environment. We used PHP as the programming language to develop an XML Export/Import system.