\input zb-basic
\input zb-ioport
\iteman{io-port 05854793}
\itemau{Keet, C.Maria; Artale, Alessandro}
\itemti{A basic characterization of relation migration.}
\itemso{Meersman, Robert (ed.) et al., On the move to meaningful internet systems: OTM 2010 workshops. Confederated international workshops and posters: International workshops: AVYTAT, ADI, DATAVIEW, EI2N, ISDE, MONET, OnToContent, ORM, P2P-CDVE, SeDeS, SWWS and OTMA. Hersonissos, Crete, Greece, October 25--29, 2010. Proceedings. Berlin: Springer (ISBN 978-3-642-16960-1/pbk). Lecture Notes in Computer Science 6428, 484-493 (2010).}
\itemab
Summary: Representing and reasoning over evolving objects has been investigated widely. Less attention has been devoted to the similar notion of relation migration, i.e., how tuples of a relation (ORM facts) can evolve along time. We identify different ways how a relation can change over time and give a logic-based semantics to the notion of relation migration to capture its behaviour. We also introduce the notion of lifespan of a relation and clarify the interactions between object migration and relation migration. Its use in graphical conceptual data modelling is illustrated with a minor extension to ORM2 so as to more easily communicate such constraints with domain experts.
\itemrv{~}
\itemcc{}
\itemut{}
\itemli{doi:10.1007/978-3-642-16961-8\_70}
\end