Querying object-oriented databases
SIGMOD '92 Proceedings of the 1992 ACM SIGMOD international conference on Management of data
Fuzzy querying in conventional databases
Fuzzy logic for the management of uncertainty
Database models for infinite and indefinite temporal information
Information Systems
Algebraic equivalences among nested relational expressions
CIKM '94 Proceedings of the third international conference on Information and knowledge management
Representation of Definite, Indefinite and Infinite Temporal Information
IDEAS '00 Proceedings of the 2000 International Symposium on Database Engineering & Applications
A Temporal Reasoning Approach to Model Workflow Activities
NGIT '99 Proceedings of the 4th International Workshop on Next Generation Information Technologies and Systems
Representing & Querying Temporal Workflow Schemas
Proceedings of the Baltic Conference, BalticDB&IS 2002 - Volume 2
Multidimensional Data Modeling for Complex Data
ICDE '99 Proceedings of the 15th International Conference on Data Engineering
The Data Warehouse Lifecycle Toolkit
The Data Warehouse Lifecycle Toolkit
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The need for explicit time representation in workflow environments has been recently identified. Although the concept of time is an intrinsic part of a workflow application, time management has been treated as an issue of ordering the constructs of the workflow specification. This traditional approach aids mainly in the monitoring of activity deadlines. There is limited support for modelling and representation of time constraints associated with the processes and their activities or cases. This paper presents a temporal formalism for representing indeterminacy to workflow specifications. We further argue that integrating workflows with temporal databases can further enhance the workflow specification. Finally we utilise agents as part of a temporal workflow environment. Particular attention is paid in the allocation of agents to workflow activities with reference to the properties of conflict resolution and moving hierarchies.