49. The computer program product of claim 47 further comprising: means for storing said one or more virtual tags with said one or more transformation rules as a respective, one or more virtual tag objects in a virtual repository; and means for retrieving said one or more stored virtual tag objects from said virtual repository when subsequently accessing said electronic document, said stored one or more transformation rules being used to generate said virtual page.
49. The computer program product of claim 47 further comprising: means for storing said one or more virtual tags with said one or more transformation rules as a respective, one or more virtual tag objects in a virtual repository; and means for retrieving said one or more stored virtual tag objects from said virtual repository when subsequently accessing said electronic document, said stored one or more transformation rules being used to generate said virtual page. 64. The system of claim 49 wherein said one or more virtual tags previously constructed are used for constructing one or more new virtual tags and one or more new transformation rules.