Abstract. We consider the problem of XML schema evolution preserving the validity of existing documents related to the original schema. The aim of such schema evolution is to fit ...
Recently, the issue of functional dependencies in XML (XFDs) have been investigated. In this paper we consider the problem of checking the satisfaction of an XFD in an XML document...
The mediator/wrapper approach is used to integrate data from different databases and other data sources by introducing a middleware virtual database that provides high level abstr...
Visibly Pushdown Languages (VPLs), recognized by Visibly Pushdown Automata (VPAs), are a nicely behaved family of contextfree languages. It has been shown that VPAs are equivalent ...
DTDs and XML Schema are important validation languages for XML documents. They lie at opposite ends of a spectrum of validation languages in terms of expressive power and readabil...