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SOFSEM
1998
Springer
15 years 4 months ago
Some Results on the Modelling of Spatial Data
Abstract. Formal methods based on the mathematical theory of partially ordered sets (i.e., posets) have been used in the database field for the modelling of spatial data since many...
Luca Forlizzi, Enrico Nardelli
PDIS
1996
IEEE
15 years 4 months ago
Querying the World Wide Web
The World Wide Web is a large, heterogeneous, distributedcollectionof documents connected by hypertext links. The most common technologycurrently used for searching the Web depend...
Alberto O. Mendelzon, George A. Mihaila, Tova Milo
APN
1994
Springer
15 years 4 months ago
On the Model of Computation of Place/Transition Petri Nets
Abstract. In the last few years, the semantics of Petri nets has been investigated in several different ways. Apart from the classical "token game", one can model the beh...
José Meseguer, Ugo Montanari, Vladimiro Sas...
ICSE
1993
IEEE-ACM
15 years 4 months ago
"...And Nothing Else Changes": The Frame Problem in Procedure Specifications
We give examples of situations where formal specifications of procedures in the standard pre/postcondition style become lengthy, cumbersome and difficult to change, a problem whic...
Alexander Borgida, John Mylopoulos, Raymond Reiter
REX
1993
15 years 4 months ago
Relationships Between Models of Concurrency
Abstract. Models for concurrency can be classified with respect to three relevant parameters: behaviour/system, interleaving/noninterleaving, linear/branching time. When modelling...
Mogens Nielsen, Vladimiro Sassone, Glynn Winskel