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Periodicity-based temporal constraints Paolo Terenziani*

Summary: Periodicity-based temporal constraints
Paolo Terenziani*
, Luca Anselma°, Stefania Montani*
DI, Univ. Piemonte Orientale "A. Avogadro", Spalto Marengo 33, Alessandria, Italy
{terenz, stefania}@mfn.unipmn.it
°DI, Universitą di Torino, Corso Svizzera 185, 10149 Torino, Italy
Abstract. We propose a framework for performing extensional and intensional
temporal reasoning about qualitative and quantitative "periodicity-dependent"
temporal constraints between repeated events, also considering user-defined
1 Introduction
Recently, several specialized approaches to deal with different kinds of temporal
constraints have been developed [9]. Some of these approaches work on "periodicity-
based" temporal constraints, in which qualitative constraints (e.g., "before" [6]) or
durations [3] between periodic events depend on the specific periodicity in which
such events occur. Independently, since the use of a periodicity or calendar depends
on the cultural, legal, and even business orientation of the users (see e.g., [5]), several
approaches have been devised to model user-defined periodicities (consider, e.g., the


Source: Anselma, Luca - Dipartimento di Informatica, Universitą di Torino


Collections: Computer Technologies and Information Sciences