3. The method of claim 1 further comprising the step of: 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 tag repository; and 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.
3. The method of claim 1 further comprising the step of: 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 tag repository; and 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. 6. The method of claim 3 further comprising the steps of: building a tree representation of said one or more instances of said electronic document; and determining a document scheme from said tree representation of said one or more instances of said electronic document and a tree structure of alternate versions of said one or more instances of said electronic document.