Title
Evaluating Exceptions on Time Slices
Abstract
Public transport schedules contain temporal data with many regular patterns that can be represented compactly. Exceptions come as modifications of the initial schedule and break the regular patterns increasing the size of the representation. A typical strategy to preserve the compactness of schedules is to keep exceptions separately. This, however, complicates the automated processing of schedules and imposes a more complex model on applications. In this paper we evaluate exceptions by incorporating them into the patterns that define schedules. We employ sets of time slices, termed multislices, as a representation formalism for schedules and exceptions. The difference of multislices corresponds to the evaluation of exceptions and produces an updated schedule in terms of a multislice. We propose a relational model for multislices, provide an algorithm for efficient evaluating the difference of multislices, and show analytically and experimentally that the evaluation of exceptions is a feasible strategy for realistic schedules.
Year
DOI
Venue
2009
10.1007/978-3-642-04840-1_20
Object-Oriented and Entity-Relationship Modelling/International Conference on Conceptual Modeling / the Entity Relationship Approach
Keywords
Field
DocType
complex model,time slices,public transport schedule,initial schedule,typical strategy,representation formalism,feasible strategy,realistic schedule,relational model,multislices corresponds,regular pattern,temporal data,public transport
Data mining,Preemption,Computer science,Algorithm,Compact space,Schedule,Temporal database,Formalism (philosophy),Relational model
Conference
Volume
ISSN
Citations 
5829
0302-9743
1
PageRank 
References 
Authors
0.36
15
3
Name
Order
Citations
PageRank
Romans Kasperovics192.59
Michael H. Böhlen21173179.40
Johann Gamper346554.06