In this paper we consider general path constraints for semistructured databases. Our general constraints do not suffer from the limitations of the path constraints previously stud...
Contained rewriting and maximal contained rewriting of tree pattern queries using views have been studied recently for the class of tree patterns involving /, //, and []. Given que...
d abstract) Diego Calvanese1 , Giuseppe De Giacomo1 , Maurizio Lenzerini1 , Moshe Y. Vardi2 1 Universit`a di Roma “La Sapienza” Dip. di Informatica e Sistemistica via Salaria 1...
Diego Calvanese, Giuseppe De Giacomo, Maurizio Len...
Virtual views are a mechanism that facilitates re-use and makes queries easier to express. However the use of iterative view definitions makes very simple query evaluation and an...
Given an intensional database (IDB) and an extension database (EDB), the view update problem translates updates on the IDB into updates on the EDB. One approach to the view update...